diff --git a/modules/openapi-generator/src/main/resources/Java/pojo.mustache b/modules/openapi-generator/src/main/resources/Java/pojo.mustache
index 653f44062d1..1754416a396 100644
--- a/modules/openapi-generator/src/main/resources/Java/pojo.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/pojo.mustache
@@ -8,6 +8,7 @@
   {{classname}}.JSON_PROPERTY_{{nameInSnakeCase}}{{^-last}},{{/-last}}
 {{/vars}}
 })
+@JsonTypeName("{{name}}")
 {{/jackson}}
 {{>additionalModelTypeAnnotations}}{{>generatedAnnotation}}{{#discriminator}}{{>typeInfoAnnotation}}{{/discriminator}}{{>xmlAnnotation}}
 public class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{{#vendorExtensions.x-implements}}{{#-first}}implements {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{#-last}} {{/-last}}{{/vendorExtensions.x-implements}}{
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ed7e6208829..69dabddfb14 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index e8ab9ce9565..dd0b5d8f55e 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 48afb5b470b..e681cb5b824 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayTest.java
index 55935f343f5..bdcc439a5ec 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Cat.java
index 11c2fd9d662..cad2931b1ba 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/CatAllOf.java
index 35c447ac0e9..e4802f50ff6 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumArrays.java
index 0ac0036a126..f1250725f78 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index bd7a3dc18ec..963fe400ccb 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FormatTest.java
index 80b36862ad7..9ff00f4e174 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MapTest.java
index bf8f3e69457..1a01d996695 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 1535857a4de..9d3468b0efa 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Order.java
index 504b92303ec..aa9bda546dd 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/OuterComposite.java
index 31b0d1358fa..a8c3379f3df 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Pet.java
index 6a5bf52230d..676bb150cf4 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 576744af258..53c8da26958 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 14952abd077..e991a141958 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/XmlItem.java
index 44bbe30a93a..1a92dbfb49d 100644
--- a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ed7e6208829..69dabddfb14 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index e8ab9ce9565..dd0b5d8f55e 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 48afb5b470b..e681cb5b824 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayTest.java
index 55935f343f5..bdcc439a5ec 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumArrays.java
index 0ac0036a126..f1250725f78 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index bd7a3dc18ec..963fe400ccb 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FormatTest.java
index 80b36862ad7..9ff00f4e174 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MapTest.java
index bf8f3e69457..1a01d996695 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 1535857a4de..9d3468b0efa 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Order.java
index b3c44d7f5da..b3ff3f899c2 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Pet.java
index 6a5bf52230d..676bb150cf4 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 7591858f5a4..eea3eb5d325 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 7d40ec56e6f..744c4c54041 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/XmlItem.java
index cac71c7221b..b4d37be1ec1 100644
--- a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ed7e6208829..69dabddfb14 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index e8ab9ce9565..dd0b5d8f55e 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 48afb5b470b..e681cb5b824 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayTest.java
index 55935f343f5..bdcc439a5ec 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumArrays.java
index 0ac0036a126..f1250725f78 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index bd7a3dc18ec..963fe400ccb 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FormatTest.java
index 80b36862ad7..9ff00f4e174 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MapTest.java
index bf8f3e69457..1a01d996695 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 1535857a4de..9d3468b0efa 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Order.java
index b3c44d7f5da..b3ff3f899c2 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Pet.java
index 6a5bf52230d..676bb150cf4 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 7591858f5a4..eea3eb5d325 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 7d40ec56e6f..744c4c54041 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/XmlItem.java
index cac71c7221b..b4d37be1ec1 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 5ebe1c8ee18..b8384154297 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index f914c4e3fcb..451fb921ed9 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 487cf1fc561..5e0a8bf1775 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 9cb9ec3b910..850655a7bf5 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 02af190b86f..6d227683f21 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index a16182f31fe..7e4c01b58fe 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 0e95700279e..f36d34a0a55 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index f271d047b66..404c9afac7b 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Animal.java
index b1696a15313..e7fcffafcaf 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index d5ec3bd25a5..ff29cbd649b 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 35faf670399..218df786344 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayTest.java
index e2072043de9..b02f5bc7859 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCat.java
index 977dfe8c7a0..cc33fb0e900 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index 06ea3367a30..94578707ba6 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Capitalization.java
index e2f6f53c30e..8ba2c2edfe1 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Cat.java
index e2a016871bd..1b1f719eed5 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/CatAllOf.java
index 599d25f19a9..59265384ceb 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Category.java
index 59fd6769b8f..2d0635698d0 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ClassModel.java
index 66097484b81..a2f379a4fcc 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Client.java
index 722ebd54715..16c5b187867 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Dog.java
index 7a35b22a219..a7d4d0bb67d 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/DogAllOf.java
index 84ccb965aa8..a2da595e240 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumArrays.java
index c7d655942e5..a879a1a5818 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumTest.java
index 228f40c25a5..aa566c522fb 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index b63dd70b9fc..61bc8afe5ca 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FormatTest.java
index b1ff8f62848..30b5485ed4b 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index d97638b9718..cb3f7e2df65 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MapTest.java
index 6526c3b9e0e..941d0948f52 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index c0b5421506a..e6a3e833e88 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Model200Response.java
index 580ba9ec082..407654ced87 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index b04a200f706..73130efae9c 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelReturn.java
index d305142f664..531db822e91 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Name.java
index f0ec7081f20..129237744f1 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/NumberOnly.java
index c824c8f32fc..3a778f12b7a 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Order.java
index 11fa861b7ed..d8c64568783 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterComposite.java
index c9cf98b070a..e9521e72e13 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Pet.java
index 8497783b508..2656090a8dc 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index eadfaa84449..a8163489063 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SpecialModelName.java
index fd40afb4847..6bb2ab83731 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Tag.java
index 83ef3325718..d04c324a353 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 1b4ced9e2b3..685a6d6cec6 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 05b715a1111..c21bf8dde8a 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/User.java
index 278b837b1af..73c4374a992 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/XmlItem.java
index 98c0531d95e..39be9f2a535 100644
--- a/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 5ebe1c8ee18..b8384154297 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index f914c4e3fcb..451fb921ed9 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 487cf1fc561..5e0a8bf1775 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 9cb9ec3b910..850655a7bf5 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 02af190b86f..6d227683f21 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index a16182f31fe..7e4c01b58fe 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 0e95700279e..f36d34a0a55 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index f271d047b66..404c9afac7b 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Animal.java
index b1696a15313..e7fcffafcaf 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index d5ec3bd25a5..ff29cbd649b 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 35faf670399..218df786344 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayTest.java
index e2072043de9..b02f5bc7859 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCat.java
index 977dfe8c7a0..cc33fb0e900 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index 06ea3367a30..94578707ba6 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Capitalization.java
index e2f6f53c30e..8ba2c2edfe1 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Cat.java
index e2a016871bd..1b1f719eed5 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/CatAllOf.java
index 599d25f19a9..59265384ceb 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Category.java
index 59fd6769b8f..2d0635698d0 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ClassModel.java
index 66097484b81..a2f379a4fcc 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Client.java
index 722ebd54715..16c5b187867 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Dog.java
index 7a35b22a219..a7d4d0bb67d 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/DogAllOf.java
index 84ccb965aa8..a2da595e240 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumArrays.java
index c7d655942e5..a879a1a5818 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumTest.java
index 228f40c25a5..aa566c522fb 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index b63dd70b9fc..61bc8afe5ca 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FormatTest.java
index b1ff8f62848..30b5485ed4b 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index d97638b9718..cb3f7e2df65 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MapTest.java
index 6526c3b9e0e..941d0948f52 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index c0b5421506a..e6a3e833e88 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Model200Response.java
index 580ba9ec082..407654ced87 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index b04a200f706..73130efae9c 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelReturn.java
index d305142f664..531db822e91 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Name.java
index f0ec7081f20..129237744f1 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/NumberOnly.java
index c824c8f32fc..3a778f12b7a 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Order.java
index 11fa861b7ed..d8c64568783 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/OuterComposite.java
index c9cf98b070a..e9521e72e13 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Pet.java
index 8497783b508..2656090a8dc 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index eadfaa84449..a8163489063 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/SpecialModelName.java
index fd40afb4847..6bb2ab83731 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Tag.java
index 83ef3325718..d04c324a353 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 1b4ced9e2b3..685a6d6cec6 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 05b715a1111..c21bf8dde8a 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/User.java
index 278b837b1af..73c4374a992 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/XmlItem.java
index 98c0531d95e..39be9f2a535 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8a8cbcb2136..369c9055890 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 8351a9f6bd9..71f66209c53 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 6d4ba919e2a..3ce97ede5f8 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ea6367b321b..a82fc748f3d 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -47,6 +47,7 @@ import org.hibernate.validator.constraints.*;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 097ad92a8ea..ea64c8e86a9 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 58e6beefb67..11a6c6dbf3e 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index bdd98a66c5f..d229b08588d 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index dcedade3e05..50f9a1828d0 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Animal.java
index 6000099c10a..67c8842108a 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Animal.java
@@ -39,6 +39,7 @@ import org.hibernate.validator.constraints.*;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index 496074f932e..542a0399ed7 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index b708449a3f4..9fe646bac81 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayTest.java
index 62ea923ecd8..bb83a4975ed 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -38,6 +38,7 @@ import org.hibernate.validator.constraints.*;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCat.java
index 55b712b372b..49c0f1fb11e 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCat.java
@@ -37,6 +37,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index e16b2adb83f..c1a12c8bf45 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -33,6 +33,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Capitalization.java
index 39a7a222228..173870c2d26 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -38,6 +38,7 @@ import org.hibernate.validator.constraints.*;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Cat.java
index ad57bdd07c4..bee1425ff99 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Cat.java
@@ -38,6 +38,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/CatAllOf.java
index 5e7b5db80f8..ac424799ed4 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -33,6 +33,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Category.java
index 27fbb540578..ccd9f93c584 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Category.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ClassModel.java
index f8de7e1af7c..a3a74f29d38 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Client.java
index fdabdf1a4a6..4d328806bea 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Client.java
@@ -33,6 +33,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Dog.java
index 5adb5c7fd32..e81d56c4f06 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Dog.java
@@ -37,6 +37,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/DogAllOf.java
index e0111656a3a..deb268002a9 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -33,6 +33,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumArrays.java
index 86cf02f315c..951183417db 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumTest.java
index 7db84922f2e..e8fa82b0354 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -38,6 +38,7 @@ import org.hibernate.validator.constraints.*;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index 8d4bbba1cca..5ca05e38be1 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FormatTest.java
index 46bbbee3d44..9602ed5d8f6 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -51,6 +51,7 @@ import org.hibernate.validator.constraints.*;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index e1eef91976b..0122ac4712e 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MapTest.java
index a62998d7dc9..f8f26d972aa 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MapTest.java
@@ -39,6 +39,7 @@ import org.hibernate.validator.constraints.*;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 7f05131c8a2..cac573fa8d7 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -41,6 +41,7 @@ import org.hibernate.validator.constraints.*;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Model200Response.java
index e9cded1a198..7f0bd6d0a97 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index 10b29e5ccd0..e4e9b9dbf4b 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -35,6 +35,7 @@ import org.hibernate.validator.constraints.*;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelReturn.java
index 51543a59aa2..dd928b4ce53 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Name.java
index cbaf054096e..eb28bc295b5 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Name.java
@@ -37,6 +37,7 @@ import org.hibernate.validator.constraints.*;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/NumberOnly.java
index 808c98571fa..3dd9b8242b7 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Order.java
index b3d94578008..30409727260 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Order.java
@@ -39,6 +39,7 @@ import org.hibernate.validator.constraints.*;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/OuterComposite.java
index d817fe339de..86989454bbe 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -36,6 +36,7 @@ import org.hibernate.validator.constraints.*;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Pet.java
index 96e32de0d7b..e537e21c396 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Pet.java
@@ -44,6 +44,7 @@ import org.hibernate.validator.constraints.*;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index ac3322d6704..d90bc2fb132 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 65632ef87f1..b6e97d4e5b8 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -33,6 +33,7 @@ import org.hibernate.validator.constraints.*;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Tag.java
index e35043410b4..302e2555b67 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/Tag.java
@@ -34,6 +34,7 @@ import org.hibernate.validator.constraints.*;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index eeff89514d4..42c86a3a82f 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -40,6 +40,7 @@ import org.hibernate.validator.constraints.*;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 70e592bafc2..3cf28c8bf1a 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -41,6 +41,7 @@ import org.hibernate.validator.constraints.*;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/User.java
index 73fcd3b05e5..43803f81c9d 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/User.java
@@ -40,6 +40,7 @@ import org.hibernate.validator.constraints.*;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/XmlItem.java
index b33587769a7..7df99e1cf3b 100644
--- a/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/rest-assured-jackson/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -64,6 +64,7 @@ import org.hibernate.validator.constraints.*;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ed7e6208829..69dabddfb14 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index e8ab9ce9565..dd0b5d8f55e 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 48afb5b470b..e681cb5b824 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayTest.java
index 55935f343f5..bdcc439a5ec 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumArrays.java
index 0ac0036a126..f1250725f78 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index bd7a3dc18ec..963fe400ccb 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FormatTest.java
index 80b36862ad7..9ff00f4e174 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MapTest.java
index bf8f3e69457..1a01d996695 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 1535857a4de..9d3468b0efa 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Order.java
index b3c44d7f5da..b3ff3f899c2 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Pet.java
index 6a5bf52230d..676bb150cf4 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 7591858f5a4..eea3eb5d325 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 7d40ec56e6f..744c4c54041 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/XmlItem.java
index cac71c7221b..b4d37be1ec1 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index efc3b84bf2a..c3987e3e6b8 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesAnyType")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 31a4337b6d2..f712562fe2c 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesArray")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index ee23b1af511..dc2bb3eef1e 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesBoolean")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 3d5e6fcace6..9c8e03cc6fa 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -46,6 +46,7 @@ import javax.xml.bind.annotation.*;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesClass")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 8e7d92f3c05..61e3d378277 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesInteger")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 78cb61213ea..3ee492823a2 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesNumber")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 4500d7c75e9..8686828cea6 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesObject")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index ecb1ee65991..7a1466746e8 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "AdditionalPropertiesString")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Animal.java
index a1c686e4043..f095e15f8fc 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Animal.java
@@ -38,6 +38,7 @@ import javax.xml.bind.annotation.*;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index 5b7a37e2c6c..419372fe652 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ArrayOfArrayOfNumberOnly")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 4229fe87922..3b5fc5fce8b 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ArrayOfNumberOnly")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayTest.java
index a9d28beed59..e48085b5ed5 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -37,6 +37,7 @@ import javax.xml.bind.annotation.*;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ArrayTest")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCat.java
index 6620a9b97f8..ca4dedcd931 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCat.java
@@ -36,6 +36,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index 2e18b155835..d316f2b36a9 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "BigCatAllOf")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Capitalization.java
index 99bd1d44c16..d48b6fa8822 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -37,6 +37,7 @@ import javax.xml.bind.annotation.*;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Capitalization")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Cat.java
index 819f471d4d2..e1a042dd2f7 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Cat.java
@@ -37,6 +37,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/CatAllOf.java
index 08013a05f17..462407581cb 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "CatAllOf")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Category.java
index 0fac149c3f1..a930d1bc6c1 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Category.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Category")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ClassModel.java
index ddf9c5ff4d0..c033a35e123 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ClassModel")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Client.java
index ea032cc67a2..600c79b96bc 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Client.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Client")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Dog.java
index 7b29a6925fb..cda1e44bf96 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Dog.java
@@ -36,6 +36,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/DogAllOf.java
index 245acff75f0..82015fc5922 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "DogAllOf")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumArrays.java
index 3e0a30d5db4..3fc53e70aaa 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "EnumArrays")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumTest.java
index 2e7c564e1de..65d86469fcd 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -37,6 +37,7 @@ import javax.xml.bind.annotation.*;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "EnumTest")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index d10064f9917..b780bd75ddf 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "FileSchemaTestClass")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FormatTest.java
index 91704f198c4..97c7d3db0b6 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -50,6 +50,7 @@ import javax.xml.bind.annotation.*;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "FormatTest")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index e74c99362ca..159dc84522b 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "HasOnlyReadOnly")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MapTest.java
index 8b884e9219a..dfe553a53b4 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MapTest.java
@@ -38,6 +38,7 @@ import javax.xml.bind.annotation.*;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "MapTest")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 6f861da33ca..baa0706b448 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -40,6 +40,7 @@ import javax.xml.bind.annotation.*;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "MixedPropertiesAndAdditionalPropertiesClass")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Model200Response.java
index c3464184ebe..8cc0b01a465 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Name")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index 614c174f1e9..ea7ade3b0c2 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -34,6 +34,7 @@ import javax.xml.bind.annotation.*;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ModelApiResponse")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelReturn.java
index 656b594449d..6b134c78ada 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Return")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Name.java
index 79927485b64..9e94b613cec 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Name.java
@@ -36,6 +36,7 @@ import javax.xml.bind.annotation.*;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Name")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/NumberOnly.java
index 272c4dd85ee..b778927f320 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "NumberOnly")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Order.java
index ee3ecc82c41..f8495458a35 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Order.java
@@ -38,6 +38,7 @@ import javax.xml.bind.annotation.*;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Order")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/OuterComposite.java
index 35ee47ce134..0226b0ecbbd 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -35,6 +35,7 @@ import javax.xml.bind.annotation.*;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "OuterComposite")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Pet.java
index 37909c018d6..0424303b076 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Pet.java
@@ -43,6 +43,7 @@ import javax.xml.bind.annotation.*;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Pet")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 0be00a22367..57084c5e993 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "ReadOnlyFirst")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 58163dd6d17..32cce001290 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.*;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "$special[model.name]")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Tag.java
index 974ad471b0c..a2a2a2c4edb 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/Tag.java
@@ -33,6 +33,7 @@ import javax.xml.bind.annotation.*;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "Tag")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 0dc0b2bba1d..194b3f5945f 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -39,6 +39,7 @@ import javax.xml.bind.annotation.*;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "TypeHolderDefault")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index c9f2384befd..f92547fa4ae 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -40,6 +40,7 @@ import javax.xml.bind.annotation.*;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "TypeHolderExample")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/User.java
index 422d7752bd6..13e68b7831f 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/User.java
@@ -39,6 +39,7 @@ import javax.xml.bind.annotation.*;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(name = "User")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/XmlItem.java
index 203718e6be8..e52e67606a1 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -63,6 +63,7 @@ import javax.xml.bind.annotation.*;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @XmlRootElement(namespace="http://a.com/schema", name = "XmlItem")
 @XmlAccessorType(XmlAccessType.FIELD)
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index ed7e6208829..69dabddfb14 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index e8ab9ce9565..dd0b5d8f55e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index 48afb5b470b..e681cb5b824 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayTest.java
index 55935f343f5..bdcc439a5ec 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumArrays.java
index 0ac0036a126..f1250725f78 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index bd7a3dc18ec..963fe400ccb 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FormatTest.java
index 80b36862ad7..9ff00f4e174 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MapTest.java
index bf8f3e69457..1a01d996695 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 1535857a4de..9d3468b0efa 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Order.java
index b3c44d7f5da..b3ff3f899c2 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Pet.java
index 6a5bf52230d..676bb150cf4 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 7591858f5a4..eea3eb5d325 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 7d40ec56e6f..744c4c54041 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/XmlItem.java
index cac71c7221b..b4d37be1ec1 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index fa6626c94e0..387b7f51314 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 354b0903000..9f5af133b98 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index d7288e217bb..8ce8a83beb4 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 88c28846436..75fd3415821 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -46,6 +46,7 @@ import javax.validation.Valid;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 124f23b8118..182e01e7273 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 4e85c9bc75d..5121298662d 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 0c207b1ae4e..276ea5e5d3f 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index 38a2d64184d..2cb110c33d5 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Animal.java
index 8c60f38980a..331815a2399 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Animal.java
@@ -38,6 +38,7 @@ import javax.validation.Valid;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index dd4eab20728..d8d7e6c0b34 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index e53d9fa43be..4174c5c51d5 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayTest.java
index 7c63ae77edf..fb173a83038 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -37,6 +37,7 @@ import javax.validation.Valid;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCat.java
index 2b715b520bf..ec916f10527 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCat.java
@@ -36,6 +36,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index 753ab4858bd..527c3c6404c 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -32,6 +32,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Capitalization.java
index b35babfce00..e5989afa63e 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -37,6 +37,7 @@ import javax.validation.Valid;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Cat.java
index f3f16caeb0e..e3334667fbf 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Cat.java
@@ -37,6 +37,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/CatAllOf.java
index eb7bffd9769..42cb0bc374e 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -32,6 +32,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Category.java
index 6254fd1572c..f415fdeccb5 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Category.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ClassModel.java
index 9daccdea987..7fe05b05352 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Client.java
index 00211f41e45..5ef6ec4dd28 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Client.java
@@ -32,6 +32,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Dog.java
index 24a79dd6a8b..95ef0ecb2eb 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Dog.java
@@ -36,6 +36,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/DogAllOf.java
index 524e0959dbe..93510a32e63 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -32,6 +32,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumArrays.java
index ffb811dcd62..23738bf1532 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumTest.java
index 5d1e7704064..b0b4965fb2f 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -37,6 +37,7 @@ import javax.validation.Valid;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index 6aa90e5fe21..1c126d30712 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FormatTest.java
index 3c77f93588f..4f38c6602cf 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -50,6 +50,7 @@ import javax.validation.Valid;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index fd12294525f..d3a6d83b4ab 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MapTest.java
index 1af6a8647a3..7cda035f9fa 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MapTest.java
@@ -38,6 +38,7 @@ import javax.validation.Valid;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index b89403e74c3..616414d0252 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -40,6 +40,7 @@ import javax.validation.Valid;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Model200Response.java
index f81da2c68d4..8f22137e39c 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index d2d83b7c8c8..49f8f9a8b60 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -34,6 +34,7 @@ import javax.validation.Valid;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelReturn.java
index 615643b0c20..74f47f3347c 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Name.java
index bb632537c29..86d9872a6f9 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Name.java
@@ -36,6 +36,7 @@ import javax.validation.Valid;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/NumberOnly.java
index e28055d3e0e..40e0022dafe 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Order.java
index 958cde521c7..7ad9832e30c 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Order.java
@@ -38,6 +38,7 @@ import javax.validation.Valid;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/OuterComposite.java
index d43f68b95b7..373dbdb2116 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -35,6 +35,7 @@ import javax.validation.Valid;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Pet.java
index 5c9aaa274f6..3cff642f98f 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Pet.java
@@ -43,6 +43,7 @@ import javax.validation.Valid;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 94ff8172c38..26b7cbe70ee 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 244b9b5fe4d..cc0959a6cd0 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -32,6 +32,7 @@ import javax.validation.Valid;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Tag.java
index 16654daed44..23dda1dae1f 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/Tag.java
@@ -33,6 +33,7 @@ import javax.validation.Valid;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index c8a59d7a5d8..beaf2efb9df 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -39,6 +39,7 @@ import javax.validation.Valid;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index cf507a49fdd..a2e2ab32084 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -40,6 +40,7 @@ import javax.validation.Valid;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/User.java
index f666b56bdd2..31c43108fa4 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/User.java
@@ -39,6 +39,7 @@ import javax.validation.Valid;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/XmlItem.java
index 5fb882c6e85..c862ef57ad8 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -63,6 +63,7 @@ import javax.validation.Valid;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 72b63a9ecef..fe92686d699 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index 13daa982415..80f01df5c69 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index de2bc5fd8e0..9cc52573b7e 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayTest.java
index 3c88533eaa5..96f71f6261a 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumArrays.java
index e670cf4b391..703122c4b77 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index e22a96e86da..4ed33e999cc 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FormatTest.java
index 054cf24c9ce..4e5f5f4e9db 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MapTest.java
index 4662120ae29..7a54ba52864 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 15fd74975df..b05c8cbc5cd 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Order.java
index 7aa3053c0ae..4b7dd3df38d 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Pet.java
index 4eec0507992..ed5a336b7de 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 0c86ba44682..c3629b1c0a7 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 127acb1c0df..16071d123fc 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/XmlItem.java
index e7f4fb912d6..1407a6d002c 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
index 8d2c7147bdb..62b1da4c2f0 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesAnyType")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
index 79e87782bd2..0115b4dd963 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesArray.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesArray")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesArray extends HashMap<String, List> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
index 8c5bc6271da..a430b6fc572 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesBoolean")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
index 72b63a9ecef..fe92686d699 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java
@@ -44,6 +44,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
   AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
 })
+@JsonTypeName("AdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
   public static final String JSON_PROPERTY_MAP_STRING = "map_string";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
index 41d50c58cea..9f7587c2edf 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesInteger.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesInteger")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
index 5b656c5825a..9700dab2bd2 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesNumber.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesNumber")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
index 2326f099b48..60a59e97a22 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesObject.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesObject")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
index cde27cbad9f..5d355241baf 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   AdditionalPropertiesString.JSON_PROPERTY_NAME
 })
+@JsonTypeName("AdditionalPropertiesString")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesString extends HashMap<String, String> {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Animal.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Animal.java
index 9dc580215d1..99d5797e86e 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Animal.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Animal.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Animal.JSON_PROPERTY_CLASS_NAME,
   Animal.JSON_PROPERTY_COLOR
 })
+@JsonTypeName("Animal")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
index 13daa982415..80f01df5c69 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
index de2bc5fd8e0..9cc52573b7e 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
 })
+@JsonTypeName("ArrayOfNumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayOfNumberOnly {
   public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayTest.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayTest.java
index 3c88533eaa5..96f71f6261a 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayTest.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ArrayTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
   ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
 })
+@JsonTypeName("ArrayTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ArrayTest {
   public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCat.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCat.java
index 864ec623e43..b3033deacc7 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCat.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCat.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCat.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCatAllOf.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCatAllOf.java
index a22af0b67c0..6a3df7eafca 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCatAllOf.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/BigCatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   BigCatAllOf.JSON_PROPERTY_KIND
 })
+@JsonTypeName("BigCat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BigCatAllOf {
   /**
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Capitalization.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Capitalization.java
index c7ea7879dbe..6d7704bfba0 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Capitalization.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Capitalization.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
   Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
 })
+@JsonTypeName("Capitalization")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Capitalization {
   public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Cat.java
index 664eb00008b..ed7d126fa5c 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Cat.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Cat.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/CatAllOf.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/CatAllOf.java
index bbbb99689bd..a90ea75ffb7 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/CatAllOf.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/CatAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   CatAllOf.JSON_PROPERTY_DECLAWED
 })
+@JsonTypeName("Cat_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class CatAllOf {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Category.java
index 5823854c4c9..87a09fb2bae 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Category.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Category.JSON_PROPERTY_ID,
   Category.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Category")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Category {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ClassModel.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ClassModel.java
index 93445a9610c..c4008f60e64 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ClassModel.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ClassModel.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ClassModel.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("ClassModel")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ClassModel {
   public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Client.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Client.java
index 2820a5517c9..013eeba9b6e 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Client.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Client.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Client.JSON_PROPERTY_CLIENT
 })
+@JsonTypeName("Client")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Client {
   public static final String JSON_PROPERTY_CLIENT = "client";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Dog.java
index d81430849bb..5f29f08ac2e 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Dog.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   Dog.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
 
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/DogAllOf.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/DogAllOf.java
index 21babf24544..c5af5ce9324 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/DogAllOf.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/DogAllOf.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   DogAllOf.JSON_PROPERTY_BREED
 })
+@JsonTypeName("Dog_allOf")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DogAllOf {
   public static final String JSON_PROPERTY_BREED = "breed";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumArrays.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumArrays.java
index e670cf4b391..703122c4b77 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumArrays.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumArrays.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
   EnumArrays.JSON_PROPERTY_ARRAY_ENUM
 })
+@JsonTypeName("EnumArrays")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumArrays {
   /**
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumTest.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumTest.java
index e58cb6c2627..180480621bf 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumTest.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/EnumTest.java
@@ -35,6 +35,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   EnumTest.JSON_PROPERTY_ENUM_NUMBER,
   EnumTest.JSON_PROPERTY_OUTER_ENUM
 })
+@JsonTypeName("Enum_Test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
   /**
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
index e22a96e86da..4ed33e999cc 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FileSchemaTestClass.JSON_PROPERTY_FILE,
   FileSchemaTestClass.JSON_PROPERTY_FILES
 })
+@JsonTypeName("FileSchemaTestClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FileSchemaTestClass {
   public static final String JSON_PROPERTY_FILE = "file";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FormatTest.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FormatTest.java
index 16a5c6b6a67..c06b5e2cdb6 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FormatTest.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/FormatTest.java
@@ -48,6 +48,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_PASSWORD,
   FormatTest.JSON_PROPERTY_BIG_DECIMAL
 })
+@JsonTypeName("format_test")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
   public static final String JSON_PROPERTY_INTEGER = "integer";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
index 09ce9ea3cba..7d19aedaf05 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   HasOnlyReadOnly.JSON_PROPERTY_BAR,
   HasOnlyReadOnly.JSON_PROPERTY_FOO
 })
+@JsonTypeName("hasOnlyReadOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HasOnlyReadOnly {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MapTest.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MapTest.java
index 4662120ae29..7a54ba52864 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MapTest.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MapTest.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MapTest.JSON_PROPERTY_DIRECT_MAP,
   MapTest.JSON_PROPERTY_INDIRECT_MAP
 })
+@JsonTypeName("MapTest")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MapTest {
   public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
index 15fd74975df..b05c8cbc5cd 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
   MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
 })
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class MixedPropertiesAndAdditionalPropertiesClass {
   public static final String JSON_PROPERTY_UUID = "uuid";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Model200Response.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Model200Response.java
index f4cfa618708..a0128aa6fa5 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Model200Response.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Model200Response.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Model200Response.JSON_PROPERTY_NAME,
   Model200Response.JSON_PROPERTY_PROPERTY_CLASS
 })
+@JsonTypeName("200_response")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Model200Response {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index fadebd3adae..d4b95b9f279 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -32,6 +32,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ModelApiResponse.JSON_PROPERTY_TYPE,
   ModelApiResponse.JSON_PROPERTY_MESSAGE
 })
+@JsonTypeName("ApiResponse")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelApiResponse {
   public static final String JSON_PROPERTY_CODE = "code";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelReturn.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelReturn.java
index fd011c26d08..dff176002fd 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelReturn.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ModelReturn.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   ModelReturn.JSON_PROPERTY_RETURN
 })
+@JsonTypeName("Return")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ModelReturn {
   public static final String JSON_PROPERTY_RETURN = "return";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Name.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Name.java
index 2856bb62713..0d2544deef1 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Name.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Name.java
@@ -34,6 +34,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Name.JSON_PROPERTY_PROPERTY,
   Name.JSON_PROPERTY_123NUMBER
 })
+@JsonTypeName("Name")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Name {
   public static final String JSON_PROPERTY_NAME = "name";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/NumberOnly.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/NumberOnly.java
index 6f75ce84869..70fd4e2bd2e 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/NumberOnly.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/NumberOnly.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   NumberOnly.JSON_PROPERTY_JUST_NUMBER
 })
+@JsonTypeName("NumberOnly")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class NumberOnly {
   public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Order.java
index 7aa3053c0ae..4b7dd3df38d 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Order.java
@@ -36,6 +36,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Order.JSON_PROPERTY_STATUS,
   Order.JSON_PROPERTY_COMPLETE
 })
+@JsonTypeName("Order")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Order {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/OuterComposite.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/OuterComposite.java
index 01d6299649f..5065b8e6326 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/OuterComposite.java
@@ -33,6 +33,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   OuterComposite.JSON_PROPERTY_MY_STRING,
   OuterComposite.JSON_PROPERTY_MY_BOOLEAN
 })
+@JsonTypeName("OuterComposite")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class OuterComposite {
   public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Pet.java
index 4eec0507992..ed5a336b7de 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Pet.java
@@ -41,6 +41,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Pet.JSON_PROPERTY_TAGS,
   Pet.JSON_PROPERTY_STATUS
 })
+@JsonTypeName("Pet")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Pet {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
index 938b1ab5306..10615e92497 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   ReadOnlyFirst.JSON_PROPERTY_BAR,
   ReadOnlyFirst.JSON_PROPERTY_BAZ
 })
+@JsonTypeName("ReadOnlyFirst")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class ReadOnlyFirst {
   public static final String JSON_PROPERTY_BAR = "bar";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/SpecialModelName.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/SpecialModelName.java
index 0e689d7d2dc..b41f654fab8 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/SpecialModelName.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/SpecialModelName.java
@@ -30,6 +30,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonPropertyOrder({
   SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
 })
+@JsonTypeName("$special[model.name]")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class SpecialModelName {
   public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Tag.java
index 09eb968690d..d551564e69c 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/Tag.java
@@ -31,6 +31,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   Tag.JSON_PROPERTY_ID,
   Tag.JSON_PROPERTY_NAME
 })
+@JsonTypeName("Tag")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class Tag {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
index 0c86ba44682..c3629b1c0a7 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderDefault")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderDefault {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java
index 127acb1c0df..16071d123fc 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -38,6 +38,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
   TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
 })
+@JsonTypeName("TypeHolderExample")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TypeHolderExample {
   public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/User.java
index 68d6a47d486..0f0e9cbde49 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/User.java
@@ -37,6 +37,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   User.JSON_PROPERTY_PHONE,
   User.JSON_PROPERTY_USER_STATUS
 })
+@JsonTypeName("User")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class User {
   public static final String JSON_PROPERTY_ID = "id";
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/XmlItem.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/XmlItem.java
index e7f4fb912d6..1407a6d002c 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/XmlItem.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/XmlItem.java
@@ -61,6 +61,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   XmlItem.JSON_PROPERTY_PREFIX_NS_ARRAY,
   XmlItem.JSON_PROPERTY_PREFIX_NS_WRAPPED_ARRAY
 })
+@JsonTypeName("XmlItem")
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class XmlItem {
   public static final String JSON_PROPERTY_ATTRIBUTE_STRING = "attribute_string";