fix: #1466 additionalProperties works now in spring generator (#11572) (fix #1466)

* fix: #1466 additionalProperties works now in spring generator

* chore: chore: #1466 solved rebase conflicts

* 1466; updated samples

* [Spring] update additionalProperties MR

* [Spring] additionalProperties unit test

---------

Co-authored-by: Your Name <benfonty@gmail.com>
Co-authored-by: Oleh Kurpiak <oleh.kurpiak@gmail.com>

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java

@@ -716,6 +716,7 @@ public class SpringCodegen extends AbstractJavaCodegen
             apiTemplateFiles.clear();
             modelTemplateFiles.clear();
         }
+        supportsAdditionalPropertiesWithComposedSchema = true;
     }
 
     private boolean containsEnums() {

modules/openapi-generator/src/main/resources/JavaSpring/additionalProperties.mustache

@@ -0,0 +1,39 @@
+{{#additionalPropertiesType}}
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, {{{.}}}> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public {{classname}} putAdditionalProperty(String key, {{{.}}} value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, {{{.}}}>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, {{{.}}}> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public {{{.}}} getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
+{{/additionalPropertiesType}}

modules/openapi-generator/src/main/resources/JavaSpring/model.mustache

@@ -45,6 +45,12 @@ import {{javaxPackage}}.annotation.Generated;
 
 {{#models}}
 {{#model}}
+{{#additionalPropertiesType}}
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
+{{/additionalPropertiesType}}
 {{#isEnum}}
 {{>enumOuterClass}}
 {{/isEnum}}

modules/openapi-generator/src/main/resources/JavaSpring/pojo.mustache

@@ -194,6 +194,7 @@ public class {{classname}}{{#parent}} extends {{{parent}}}{{/parent}}{{^parent}}
   }
   {{! end feature: getter and setter }}
   {{/vars}}
+{{>additionalProperties}}
   {{#parentVars}}
 
   {{! begin feature: fluent setter methods for inherited properties }}
@@ -217,7 +218,6 @@ public class {{classname}}{{#parent}} extends {{{parent}}}{{/parent}}{{^parent}}
   {{/isMap}}
   {{! end feature: fluent setter methods for inherited properties }}
   {{/parentVars}}
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {
@@ -228,30 +228,27 @@ public class {{classname}}{{#parent}} extends {{{parent}}}{{/parent}}{{^parent}}
     }{{#hasVars}}
     {{classname}} {{classVarName}} = ({{classname}}) o;
     return {{#vars}}{{#vendorExtensions.x-is-jackson-optional-nullable}}equalsNullable(this.{{name}}, {{classVarName}}.{{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^vendorExtensions.x-is-jackson-optional-nullable}}{{#isByteArray}}Arrays{{/isByteArray}}{{^isByteArray}}Objects{{/isByteArray}}.equals(this.{{name}}, {{classVarName}}.{{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^-last}} &&
-        {{/-last}}{{/vars}}{{#parent}} &&
+        {{/-last}}{{/vars}}{{#additionalPropertiesType}} &&
+    Objects.equals(this.additionalProperties, {{classVarName}}.additionalProperties){{/additionalPropertiesType}}{{#parent}} &&
         super.equals(o){{/parent}};{{/hasVars}}{{^hasVars}}
     return true;{{/hasVars}}
-  }
-  {{#vendorExtensions.x-jackson-optional-nullable-helpers}}
+  }{{#vendorExtensions.x-jackson-optional-nullable-helpers}}
 
   private static <T> boolean equalsNullable(JsonNullable<T> a, JsonNullable<T> b) {
     return a == b || (a != null && b != null && a.isPresent() && b.isPresent() && Objects.deepEquals(a.get(), b.get()));
-  }
-  {{/vendorExtensions.x-jackson-optional-nullable-helpers}}
+  }{{/vendorExtensions.x-jackson-optional-nullable-helpers}}
 
   @Override
   public int hashCode() {
-    return Objects.hash({{#vars}}{{#vendorExtensions.x-is-jackson-optional-nullable}}hashCodeNullable({{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^vendorExtensions.x-is-jackson-optional-nullable}}{{^isByteArray}}{{name}}{{/isByteArray}}{{#isByteArray}}Arrays.hashCode({{name}}){{/isByteArray}}{{/vendorExtensions.x-is-jackson-optional-nullable}}{{^-last}}, {{/-last}}{{/vars}}{{#parent}}{{#hasVars}}, {{/hasVars}}super.hashCode(){{/parent}});
-  }
-  {{#vendorExtensions.x-jackson-optional-nullable-helpers}}
+    return Objects.hash({{#vars}}{{#vendorExtensions.x-is-jackson-optional-nullable}}hashCodeNullable({{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^vendorExtensions.x-is-jackson-optional-nullable}}{{^isByteArray}}{{name}}{{/isByteArray}}{{#isByteArray}}Arrays.hashCode({{name}}){{/isByteArray}}{{/vendorExtensions.x-is-jackson-optional-nullable}}{{^-last}}, {{/-last}}{{/vars}}{{#parent}}{{#hasVars}}, {{/hasVars}}super.hashCode(){{/parent}}{{#additionalPropertiesType}}{{#hasVars}}, {{/hasVars}}{{^hasVars}}{{#parent}}, {{/parent}}{{/hasVars}}additionalProperties{{/additionalPropertiesType}});
+  }{{#vendorExtensions.x-jackson-optional-nullable-helpers}}
 
   private static <T> int hashCodeNullable(JsonNullable<T> a) {
     if (a == null) {
       return 1;
     }
     return a.isPresent() ? Arrays.deepHashCode(new Object[]{a.get()}) : 31;
-  }
-  {{/vendorExtensions.x-jackson-optional-nullable-helpers}}
+  }{{/vendorExtensions.x-jackson-optional-nullable-helpers}}
 
   @Override
   public String toString() {
@@ -261,7 +258,9 @@ public class {{classname}}{{#parent}} extends {{{parent}}}{{/parent}}{{^parent}}
     sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     {{/parent}}
     {{#vars}}sb.append("    {{name}}: ").append(toIndentedString({{name}})).append("\n");
-    {{/vars}}sb.append("}");
+    {{/vars}}{{#additionalPropertiesType}}
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
+    {{/additionalPropertiesType}}sb.append("}");
     return sb.toString();
   }
 

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java

@@ -605,6 +605,34 @@ public class SpringCodegenTest {
                 .containsWithNameAndAttributes("RequestPart", ImmutableMap.of("value", "\"statusArray\"", "required", "false"));
     }
 
+    @Test
+    public void testAdditionalProperties_issue1466() throws IOException {
+        final SpringCodegen codegen = new SpringCodegen();
+
+        final Map<String, File> files = generateFiles(codegen, "src/test/resources/3_0/spring/petstore-with-fake-endpoints-models-for-testing.yaml");
+
+        JavaFileAssert.assertThat(files.get("AdditionalPropertiesAnyType.java"))
+            .hasProperty("additionalProperties").withType("Map<String, Object>")
+            .toType()
+            .assertMethod("putAdditionalProperty", "String", "Object")
+            .toFileAssert()
+            .assertMethod("getAdditionalProperty", "String").hasReturnType("Object");
+
+        JavaFileAssert.assertThat(files.get("AdditionalPropertiesArray.java"))
+            .hasProperty("additionalProperties").withType("Map<String, List>")
+            .toType()
+            .assertMethod("putAdditionalProperty", "String", "List")
+            .toFileAssert()
+            .assertMethod("getAdditionalProperty", "String").hasReturnType("List");
+
+        JavaFileAssert.assertThat(files.get("AdditionalPropertiesInteger.java"))
+            .hasProperty("additionalProperties").withType("Map<String, Integer>")
+            .toType()
+            .assertMethod("putAdditionalProperty", "String", "Integer")
+            .toFileAssert()
+            .assertMethod("getAdditionalProperty", "String").hasReturnType("Integer");
+    }
+
     @Test
     public void shouldAddParameterWithInHeaderWhenImplicitHeadersIsTrue_issue14418() throws IOException {
         File output = Files.createTempDirectory("test").toFile().getCanonicalFile();

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -14,12 +12,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -41,6 +43,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -52,20 +91,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -4,9 +4,7 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,12 +13,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -42,6 +44,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -53,20 +92,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -14,12 +12,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -41,6 +43,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -52,20 +91,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -14,12 +12,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -41,6 +43,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -52,20 +91,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,12 +13,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -42,6 +44,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -53,20 +92,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -4,7 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -14,12 +13,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -41,6 +44,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -52,20 +92,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -14,12 +12,16 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -41,6 +43,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -52,20 +91,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/BigCat.java

@@ -96,6 +96,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -110,7 +111,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/Cat.java

@@ -64,6 +64,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -73,7 +74,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/model/Dog.java

@@ -56,6 +56,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -65,7 +66,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesAnyTypeDto.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,13 +13,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyTypeDto
  */
 
 @JsonTypeName("AdditionalPropertiesAnyType")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyTypeDto extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyTypeDto {
 
   private String name;
 
@@ -43,6 +45,43 @@ public class AdditionalPropertiesAnyTypeDto extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyTypeDto putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -54,20 +93,21 @@ public class AdditionalPropertiesAnyTypeDto extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyTypeDto additionalPropertiesAnyType = (AdditionalPropertiesAnyTypeDto) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyTypeDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesArrayDto.java

@@ -5,9 +5,7 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -16,13 +14,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArrayDto
  */
 
 @JsonTypeName("AdditionalPropertiesArray")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArrayDto extends HashMap<String, List> {
+public class AdditionalPropertiesArrayDto {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesArrayDto extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArrayDto putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesArrayDto extends HashMap<String, List> {
     }
     AdditionalPropertiesArrayDto additionalPropertiesArray = (AdditionalPropertiesArrayDto) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArrayDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesBooleanDto.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,13 +13,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBooleanDto
  */
 
 @JsonTypeName("AdditionalPropertiesBoolean")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBooleanDto extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBooleanDto {
 
   private String name;
 
@@ -43,6 +45,43 @@ public class AdditionalPropertiesBooleanDto extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBooleanDto putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -54,20 +93,21 @@ public class AdditionalPropertiesBooleanDto extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBooleanDto additionalPropertiesBoolean = (AdditionalPropertiesBooleanDto) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBooleanDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesIntegerDto.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,13 +13,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesIntegerDto
  */
 
 @JsonTypeName("AdditionalPropertiesInteger")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesIntegerDto extends HashMap<String, Integer> {
+public class AdditionalPropertiesIntegerDto {
 
   private String name;
 
@@ -43,6 +45,43 @@ public class AdditionalPropertiesIntegerDto extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesIntegerDto putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -54,20 +93,21 @@ public class AdditionalPropertiesIntegerDto extends HashMap<String, Integer> {
     }
     AdditionalPropertiesIntegerDto additionalPropertiesInteger = (AdditionalPropertiesIntegerDto) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesIntegerDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesNumberDto.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -16,13 +14,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumberDto
  */
 
 @JsonTypeName("AdditionalPropertiesNumber")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumberDto extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumberDto {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesNumberDto extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumberDto putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesNumberDto extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumberDto additionalPropertiesNumber = (AdditionalPropertiesNumberDto) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumberDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesObjectDto.java

@@ -5,7 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -15,13 +14,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObjectDto
  */
 
 @JsonTypeName("AdditionalPropertiesObject")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObjectDto extends HashMap<String, Map> {
+public class AdditionalPropertiesObjectDto {
 
   private String name;
 
@@ -43,6 +46,43 @@ public class AdditionalPropertiesObjectDto extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObjectDto putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -54,20 +94,21 @@ public class AdditionalPropertiesObjectDto extends HashMap<String, Map> {
     }
     AdditionalPropertiesObjectDto additionalPropertiesObject = (AdditionalPropertiesObjectDto) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObjectDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/AdditionalPropertiesStringDto.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import jakarta.validation.constraints.NotNull;
@@ -15,13 +13,17 @@ import jakarta.validation.constraints.NotNull;
 import java.util.*;
 import jakarta.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesStringDto
  */
 
 @JsonTypeName("AdditionalPropertiesString")
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesStringDto extends HashMap<String, String> {
+public class AdditionalPropertiesStringDto {
 
   private String name;
 
@@ -43,6 +45,43 @@ public class AdditionalPropertiesStringDto extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesStringDto putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -54,20 +93,21 @@ public class AdditionalPropertiesStringDto extends HashMap<String, String> {
     }
     AdditionalPropertiesStringDto additionalPropertiesString = (AdditionalPropertiesStringDto) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesStringDto {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/BigCatDto.java

@@ -87,6 +87,7 @@ public class BigCatDto extends CatDto {
     this.kind = kind;
   }
 
+
   public BigCatDto declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -101,7 +102,6 @@ public class BigCatDto extends CatDto {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/CatDto.java

@@ -54,6 +54,7 @@ public class CatDto extends AnimalDto {
     this.declawed = declawed;
   }
 
+
   public CatDto className(String className) {
     super.setClassName(className);
     return this;
@@ -63,7 +64,6 @@ public class CatDto extends AnimalDto {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/model/DogDto.java

@@ -47,6 +47,7 @@ public class DogDto extends AnimalDto {
     this.breed = breed;
   }
 
+
   public DogDto className(String className) {
     super.setClassName(className);
     return this;
@@ -56,7 +57,6 @@ public class DogDto extends AnimalDto {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -4,9 +4,7 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -4,7 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -16,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -44,6 +47,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +95,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/BigCat.java

@@ -88,6 +88,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -102,7 +103,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/Cat.java

@@ -56,6 +56,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -65,7 +66,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/model/Dog.java

@@ -48,6 +48,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -57,7 +58,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/Bar.java

@@ -127,6 +127,7 @@ public class Bar extends Entity implements BarRefOrValue {
     this.foo = foo;
   }
 
+
   public Bar href(String href) {
     super.setHref(href);
     return this;
@@ -146,7 +147,6 @@ public class Bar extends Entity implements BarRefOrValue {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/BarCreate.java

@@ -106,6 +106,7 @@ public class BarCreate extends Entity {
     this.foo = foo;
   }
 
+
   public BarCreate href(String href) {
     super.setHref(href);
     return this;
@@ -130,7 +131,6 @@ public class BarCreate extends Entity {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/BarRef.java

@@ -37,6 +37,7 @@ public class BarRef extends EntityRef implements BarRefOrValue {
     super(atType);
   }
 
+
   public BarRef name(String name) {
     super.setName(name);
     return this;
@@ -71,7 +72,6 @@ public class BarRef extends EntityRef implements BarRefOrValue {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/Foo.java

@@ -81,6 +81,7 @@ public class Foo extends Entity implements FooRefOrValue {
     this.fooPropB = fooPropB;
   }
 
+
   public Foo href(String href) {
     super.setHref(href);
     return this;
@@ -105,7 +106,6 @@ public class Foo extends Entity implements FooRefOrValue {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/FooRef.java

@@ -59,6 +59,7 @@ public class FooRef extends EntityRef implements FooRefOrValue {
     this.foorefPropA = foorefPropA;
   }
 
+
   public FooRef name(String name) {
     super.setName(name);
     return this;
@@ -93,7 +94,6 @@ public class FooRef extends EntityRef implements FooRefOrValue {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/Pasta.java

@@ -59,6 +59,7 @@ public class Pasta extends Entity {
     this.vendor = vendor;
   }
 
+
   public Pasta href(String href) {
     super.setHref(href);
     return this;
@@ -83,7 +84,6 @@ public class Pasta extends Entity {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/Pizza.java

@@ -68,6 +68,7 @@ public class Pizza extends Entity {
     this.pizzaSize = pizzaSize;
   }
 
+
   public Pizza href(String href) {
     super.setHref(href);
     return this;
@@ -92,7 +93,6 @@ public class Pizza extends Entity {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/spring-boot-oneof/src/main/java/org/openapitools/model/PizzaSpeziale.java

@@ -60,6 +60,7 @@ public class PizzaSpeziale extends Pizza {
     this.toppings = toppings;
   }
 
+
   public PizzaSpeziale pizzaSize(BigDecimal pizzaSize) {
     super.setPizzaSize(pizzaSize);
     return this;
@@ -89,7 +90,6 @@ public class PizzaSpeziale extends Pizza {
     super.setAtType(atType);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -4,9 +4,7 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -4,7 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -16,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -44,6 +47,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +95,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/BigCat.java

@@ -99,6 +99,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -113,7 +114,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/Cat.java

@@ -67,6 +67,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -76,7 +77,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/Dog.java

@@ -59,6 +59,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -68,7 +69,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -4,9 +4,7 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -4,7 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -16,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -44,6 +47,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +95,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/BigCat.java

@@ -99,6 +99,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -113,7 +114,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/Cat.java

@@ -67,6 +67,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -76,7 +77,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/Dog.java

@@ -59,6 +59,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -68,7 +69,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -4,9 +4,7 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -5,8 +5,6 @@ import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -4,7 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -16,12 +15,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -44,6 +47,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +95,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -4,8 +4,6 @@ import java.net.URI;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +14,16 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/BigCat.java

@@ -99,6 +99,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -113,7 +114,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/Cat.java

@@ -67,6 +67,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -76,7 +77,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/model/Dog.java

@@ -59,6 +59,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -68,7 +69,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -16,12 +14,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -6,9 +6,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -16,12 +14,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -16,12 +14,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -7,8 +7,6 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -6,7 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -16,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -44,6 +47,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +95,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
 import javax.validation.constraints.*;
@@ -16,12 +14,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -44,6 +46,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -55,20 +94,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/BigCat.java

@@ -99,6 +99,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -113,7 +114,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/Cat.java

@@ -67,6 +67,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -76,7 +77,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/model/Dog.java

@@ -59,6 +59,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -68,7 +69,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -6,9 +6,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -18,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -46,6 +48,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -57,20 +96,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -7,8 +7,6 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -18,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -46,6 +48,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -57,20 +96,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -6,7 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -17,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -45,6 +48,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +96,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/BigCat.java

@@ -100,6 +100,7 @@ public class BigCat extends Cat {
     this.kind = kind;
   }
 
+
   public BigCat declawed(Boolean declawed) {
     super.setDeclawed(declawed);
     return this;
@@ -114,7 +115,6 @@ public class BigCat extends Cat {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/Cat.java

@@ -68,6 +68,7 @@ public class Cat extends Animal {
     this.declawed = declawed;
   }
 
+
   public Cat className(String className) {
     super.setClassName(className);
     return this;
@@ -77,7 +78,6 @@ public class Cat extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/Dog.java

@@ -60,6 +60,7 @@ public class Dog extends Animal {
     this.breed = breed;
   }
 
+
   public Dog className(String className) {
     super.setClassName(className);
     return this;
@@ -69,7 +70,6 @@ public class Dog extends Animal {
     super.setColor(color);
     return this;
   }
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesAnyType.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesAnyType
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+public class AdditionalPropertiesAnyType {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Object> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesAnyType putAdditionalProperty(String key, Object value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Object>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Object> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Object getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
     }
     AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
     return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesAnyType.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesAnyType {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesArray.java

@@ -6,9 +6,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -18,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesArray
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesArray extends HashMap<String, List> {
+public class AdditionalPropertiesArray {
 
   private String name;
 
@@ -46,6 +48,43 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, List> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesArray putAdditionalProperty(String key, List value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, List>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, List> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public List getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -57,20 +96,21 @@ public class AdditionalPropertiesArray extends HashMap<String, List> {
     }
     AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
     return Objects.equals(this.name, additionalPropertiesArray.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesArray.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesArray {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesBoolean.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesBoolean
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+public class AdditionalPropertiesBoolean {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Boolean> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesBoolean putAdditionalProperty(String key, Boolean value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Boolean>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Boolean> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Boolean getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
     }
     AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
     return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesBoolean.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesBoolean {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesInteger.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesInteger
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+public class AdditionalPropertiesInteger {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Integer> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesInteger putAdditionalProperty(String key, Integer value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Integer>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Integer> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Integer getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
     }
     AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
     return Objects.equals(this.name, additionalPropertiesInteger.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesInteger.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesInteger {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesNumber.java

@@ -7,8 +7,6 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -18,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesNumber
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+public class AdditionalPropertiesNumber {
 
   private String name;
 
@@ -46,6 +48,43 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, BigDecimal> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesNumber putAdditionalProperty(String key, BigDecimal value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, BigDecimal>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, BigDecimal> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public BigDecimal getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -57,20 +96,21 @@ public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
     }
     AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
     return Objects.equals(this.name, additionalPropertiesNumber.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesNumber.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesNumber {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesObject.java

@@ -6,7 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
 import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
@@ -17,12 +16,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesObject
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesObject extends HashMap<String, Map> {
+public class AdditionalPropertiesObject {
 
   private String name;
 
@@ -45,6 +48,43 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, Map> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesObject putAdditionalProperty(String key, Map value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, Map>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, Map> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public Map getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +96,21 @@ public class AdditionalPropertiesObject extends HashMap<String, Map> {
     }
     AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
     return Objects.equals(this.name, additionalPropertiesObject.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesObject.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesObject {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/AdditionalPropertiesString.java

@@ -6,8 +6,6 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
-import java.util.HashMap;
-import java.util.Map;
 import org.openapitools.jackson.nullable.JsonNullable;
 import java.time.OffsetDateTime;
 import javax.validation.Valid;
@@ -17,12 +15,16 @@ import javax.validation.constraints.*;
 import java.util.*;
 import javax.annotation.Generated;
 
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
 /**
  * AdditionalPropertiesString
  */
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
-public class AdditionalPropertiesString extends HashMap<String, String> {
+public class AdditionalPropertiesString {
 
   private String name;
 
@@ -45,6 +47,43 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
   public void setName(String name) {
     this.name = name;
   }
+    /**
+    * A container for additional, undeclared properties.
+    * This is a holder for any undeclared properties as specified with
+    * the 'additionalProperties' keyword in the OAS document.
+    */
+    private Map<String, String> additionalProperties;
+
+    /**
+    * Set the additional (undeclared) property with the specified name and value.
+    * If the property does not already exist, create it otherwise replace it.
+    */
+    @JsonAnySetter
+    public AdditionalPropertiesString putAdditionalProperty(String key, String value) {
+        if (this.additionalProperties == null) {
+            this.additionalProperties = new HashMap<String, String>();
+        }
+        this.additionalProperties.put(key, value);
+        return this;
+    }
+
+    /**
+    * Return the additional (undeclared) property.
+    */
+    @JsonAnyGetter
+    public Map<String, String> getAdditionalProperties() {
+        return additionalProperties;
+    }
+
+    /**
+    * Return the additional (undeclared) property with the specified name.
+    */
+    public String getAdditionalProperty(String key) {
+        if (this.additionalProperties == null) {
+            return null;
+        }
+        return this.additionalProperties.get(key);
+    }
 
   @Override
   public boolean equals(Object o) {
@@ -56,20 +95,21 @@ public class AdditionalPropertiesString extends HashMap<String, String> {
     }
     AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
     return Objects.equals(this.name, additionalPropertiesString.name) &&
-        super.equals(o);
+    Objects.equals(this.additionalProperties, additionalPropertiesString.additionalProperties);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(name, super.hashCode());
+    return Objects.hash(name, additionalProperties);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesString {\n");
-    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
     sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    
+    sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
     sb.append("}");
     return sb.toString();
   }