[Dart] Fix enum generation (#6729)

* [Dart] Fix enum generation

* Update generated Order file

* Re-add constructor

* Generate dart2 files

* Dart - nicer enum formatting

* Dart - generate enum name as className+enumName

* Dart - dont initialize vars to null by default

Fixes #3633

* Dart - Generate inlined enums and deserialize them

* Merge branch 'master' of github.com:agilob/openapi-generator into 6727

* Dart - Fix using default value

* Fix typo

* Regenerate add dart files

* dart Revert override for dart dio and jaguar

* Fix dart model tests

* Fix dart1 generated template

* Use {{{datatypeWithEnum}}}

* Dart - throw when enum not known

* Fix generating enum with datatype from list

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

@@ -1768,7 +1768,7 @@ public class DefaultCodegen implements CodegenConfig {
             if (encoding != null) {
                 codegenParameter.contentType = encoding.getContentType();
             } else {
-                LOGGER.debug("encoding not specified for " + codegenParameter.baseName);
+                LOGGER.debug("encoding not specified for {}", codegenParameter.baseName);
             }
         }
     }
@@ -1790,6 +1790,9 @@ public class DefaultCodegen implements CodegenConfig {
     /**
      * Return the default value of the property
      *
+     * Return null if you do NOT want a default value.
+     * Any non-null value will cause {{#defaultValue} check to pass.
+     *
      * @param schema Property schema
      * @return string presentation of the default value of the property
      */
@@ -1810,7 +1813,7 @@ public class DefaultCodegen implements CodegenConfig {
      */
     @SuppressWarnings("squid:S3923")
     private String getPropertyDefaultValue(Schema schema) {
-        /**
+        /*
          * Although all branches return null, this is left intentionally as examples for new contributors
          */
         if (ModelUtils.isBooleanSchema(schema)) {

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

@@ -17,6 +17,7 @@
 
 package org.openapitools.codegen.languages;
 
+import com.google.common.collect.Sets;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
 
@@ -30,9 +31,8 @@ import org.slf4j.LoggerFactory;
 
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.InputStreamReader;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.*;
 
 import static org.openapitools.codegen.utils.StringUtils.camelize;
@@ -50,6 +50,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
     public static final String PUB_HOMEPAGE = "pubHomepage";
     public static final String USE_ENUM_EXTENSION = "useEnumExtension";
     public static final String SUPPORT_DART2 = "supportDart2";
+
     protected boolean browserClient = true;
     protected String pubName = "openapi";
     protected String pubVersion = "1.0.0";
@@ -106,9 +107,11 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
         modelTestTemplateFiles.put("model_test.mustache", ".dart");
         apiTestTemplateFiles.put("api_test.mustache", ".dart");
 
-        List<String> reservedWordsList = new ArrayList<String>();
+        List<String> reservedWordsList = new ArrayList<>();
         try {
-            BufferedReader reader = new BufferedReader(new InputStreamReader(DartClientCodegen.class.getResourceAsStream("/dart/dart-keywords.txt"), Charset.forName("UTF-8")));
+            BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(DartClientCodegen.class.getResourceAsStream("/dart/dart-keywords.txt"),
+                            StandardCharsets.UTF_8));
             while (reader.ready()) {
                 reservedWordsList.add(reader.readLine());
             }
@@ -118,18 +121,17 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
         }
         setReservedWordsLowerCase(reservedWordsList);
 
-        languageSpecificPrimitives = new HashSet<String>(
-                Arrays.asList(
-                        "String",
-                        "bool",
-                        "int",
-                        "num",
-                        "double")
+        languageSpecificPrimitives = Sets.newHashSet(
+            "String",
+            "bool",
+            "int",
+            "num",
+            "double"
         );
         instantiationTypes.put("array", "List");
         instantiationTypes.put("map", "Map");
 
-        typeMapping = new HashMap<String, String>();
+        typeMapping = new HashMap<>();
         typeMapping.put("Array", "List");
         typeMapping.put("array", "List");
         typeMapping.put("List", "List");
@@ -329,7 +331,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
         // replace - with _ e.g. created-at => created_at
         name = name.replaceAll("-", "_");
 
-        // if it's all uppper case, do nothing
+        // if it's all upper case, do nothing
         if (name.matches("^[A-Z_]*$")) {
             return name;
         }
@@ -403,9 +405,9 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
     @Override
     public String toDefaultValue(Schema schema) {
         if (ModelUtils.isMapSchema(schema)) {
-            return "{}";
+            return "const {}";
         } else if (ModelUtils.isArraySchema(schema)) {
-            return "[]";
+            return "const []";
         }
 
         if (schema.getDefault() != null) {
@@ -414,7 +416,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
             }
             return schema.getDefault().toString();
         } else {
-            return "null";
+            return null;
         }
     }
 
@@ -435,7 +437,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
     @Override
     public String getSchemaType(Schema p) {
         String openAPIType = super.getSchemaType(p);
-        String type = null;
+        String type;
         if (typeMapping.containsKey(openAPIType)) {
             type = typeMapping.get(openAPIType);
             if (languageSpecificPrimitives.contains(type)) {
@@ -495,19 +497,16 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
             return false;
         }
         Object extension = cm.vendorExtensions.get("x-enum-values");
-        List<Map<String, Object>> values =
-                (List<Map<String, Object>>) extension;
-        List<Map<String, String>> enumVars =
-                new ArrayList<Map<String, String>>();
+        List<Map<String, Object>> values = (List<Map<String, Object>>) extension;
+        List<Map<String, String>> enumVars = new ArrayList<>();
         for (Map<String, Object> value : values) {
-            Map<String, String> enumVar = new HashMap<String, String>();
+            Map<String, String> enumVar = new HashMap<>();
             String name = camelize((String) value.get("identifier"), true);
             if (isReservedWord(name)) {
                 name = escapeReservedWord(name);
             }
             enumVar.put("name", name);
-            enumVar.put("value", toEnumValue(
-                    value.get("numericValue").toString(), cm.dataType));
+            enumVar.put("value", toEnumValue(value.get("numericValue").toString(), cm.dataType));
             if (value.containsKey("description")) {
                 enumVar.put("description", value.get("description").toString());
             }
@@ -611,13 +610,12 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
         }
 
         // only procees the following type (or we can simply rely on the file extension to check if it's a Dart file)
-        Set<String> supportedFileType = new HashSet<String>(
-                Arrays.asList(
-                        "supporting-mustache",
-                        "model-test",
-                        "model",
-                        "api-test",
-                        "api"));
+        Set<String> supportedFileType = Sets.newHashSet(
+            "supporting-mustache",
+            "model-test",
+            "model",
+            "api-test",
+            "api");
         if (!supportedFileType.contains(fileType)) {
             return;
         }
@@ -632,7 +630,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
                 if (exitValue != 0) {
                     LOGGER.error("Error running the command ({}). Exit code: {}", command, exitValue);
                 } else {
-                    LOGGER.info("Successfully executed: " + command);
+                    LOGGER.info("Successfully executed: {}", command);
                 }
             } catch (Exception e) {
                 LOGGER.error("Error running the command ({}). Exception: {}", command, e.getMessage());

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

@@ -130,13 +130,21 @@ public class DartDioClientCodegen extends DartClientCodegen {
     }
 
     @Override
-    public String toDefaultValue(Schema p) {
-        if (ModelUtils.isMapSchema(p)) {
+    public String toDefaultValue(Schema schema) {
+        if (ModelUtils.isMapSchema(schema)) {
             return "const {}";
-        } else if (ModelUtils.isArraySchema(p)) {
+        } else if (ModelUtils.isArraySchema(schema)) {
             return "const []";
         }
-        return super.toDefaultValue(p);
+
+        if (schema.getDefault() != null) {
+            if (ModelUtils.isStringSchema(schema)) {
+                return "\"" + schema.getDefault().toString().replaceAll("\"", "\\\"") + "\"";
+            }
+            return schema.getDefault().toString();
+        } else {
+            return "null";
+        }
     }
 
     @Override

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

@@ -132,13 +132,21 @@ public class DartJaguarClientCodegen extends DartClientCodegen {
     }
 
     @Override
-    public String toDefaultValue(Schema p) {
-        if (ModelUtils.isMapSchema(p)) {
+    public String toDefaultValue(Schema schema) {
+        if (ModelUtils.isMapSchema(schema)) {
             return "const {}";
-        } else if (ModelUtils.isArraySchema(p)) {
+        } else if (ModelUtils.isArraySchema(schema)) {
             return "const []";
         }
-        return super.toDefaultValue(p);
+
+        if (schema.getDefault() != null) {
+            if (ModelUtils.isStringSchema(schema)) {
+                return "\"" + schema.getDefault().toString().replaceAll("\"", "\\\"") + "\"";
+            }
+            return schema.getDefault().toString();
+        } else {
+            return "null";
+        }
     }
 
     @Override

modules/openapi-generator/src/main/resources/dart/class.mustache

@@ -1,7 +1,7 @@
 class {{classname}} {
   {{#vars}}
   {{#description}}/* {{{description}}} */{{/description}}
-  {{{dataType}}} {{name}} = {{{defaultValue}}};
+  {{^defaultValue}}{{{dataType}}} {{name}} = null;{{/defaultValue}}{{#defaultValue}}{{{dataType}}} {{name}} = {{defaultValue}};{{/defaultValue}}
   {{#allowableValues}}
   {{#min}} // range from {{min}} to {{max}}{{/min}}//{{^min}}enum {{name}}Enum { {{#values}} {{.}}, {{/values}} };{{/min}}{
   {{/allowableValues}}

modules/openapi-generator/src/main/resources/dart2/class.mustache

@@ -1,15 +1,19 @@
 class {{classname}} {
   {{#vars}}
-  {{#description}}/* {{{description}}} */{{/description}}
-  {{{dataType}}} {{name}} = {{{defaultValue}}};
+  {{#description}}/// {{{description}}}{{/description}}
+  {{^isEnum}}
+  {{^defaultValue}}{{{dataType}}} {{name}};{{/defaultValue}}{{#defaultValue}}{{{dataType}}} {{name}} = {{defaultValue}};{{/defaultValue}}
+  {{/isEnum}}
+  {{#isEnum}}
   {{#allowableValues}}
-  {{#min}} // range from {{min}} to {{max}}{{/min}}//{{^min}}enum {{name}}Enum { {{#values}} {{.}}, {{/values}} };{{/min}}{
+  {{#min}} // range from {{min}} to {{max}}{{/min}}{{classname}}{{{enumName}}} {{name}}{{#required}} = {{{defaultValue}}}{{/required}}{{^required}}{{/required}};
   {{/allowableValues}}
+  {{/isEnum}}
   {{/vars}}
 
   {{classname}}({
   {{#vars}}
-    {{#required}}@required this.{{name}},{{/required}}{{^required}}this.{{name}},{{/required}}
+    {{#required}}@required this.{{name}}{{/required}}{{^required}}this.{{name}}{{#defaultValue}} = {{defaultValue}}{{/defaultValue}}{{/required}},
   {{/vars}}
   });
 
@@ -78,7 +82,12 @@ class {{classname}} {
       json['{{baseName}}'].toDouble();
           {{/isDouble}}
           {{^isDouble}}
+    {{^isEnum}}
     {{name}} = json['{{baseName}}'];
+    {{/isEnum}}
+    {{#isEnum}}
+    {{name}} = {{classname}}{{{enumName}}}.fromJson(json['{{baseName}}']);
+    {{/isEnum}}
           {{/isDouble}}
         {{/isMapContainer}}
       {{/isListContainer}}
@@ -89,7 +98,7 @@ class {{classname}} {
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     {{#vars}}
         {{^isNullable}}
     if ({{name}} != null)
@@ -102,7 +111,12 @@ class {{classname}} {
       {{/isDate}}
       {{^isDateTime}}
       {{^isDate}}
+      {{^isEnum}}
       json['{{baseName}}'] = {{name}};
+      {{/isEnum}}
+      {{#isEnum}}
+      json['{{baseName}}'] = {{name}}.value;
+      {{/isEnum}}
       {{/isDate}}
       {{/isDateTime}}
     {{/vars}}
@@ -114,7 +128,7 @@ class {{classname}} {
   }
 
   static Map<String, {{classname}}> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, {{classname}}>();
+    final map = Map<String, {{classname}}>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = {{classname}}.fromJson(value));
     }
@@ -123,12 +137,17 @@ class {{classname}} {
 
   // maps a json object with a list of {{classname}}-objects as value to a dart map
   static Map<String, List<{{classname}}>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<{{classname}}>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = {{classname}}.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<{{classname}}>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = {{classname}}.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
+{{#vars}}
+{{#isEnum}}
+{{>enum_inline}}
+{{/isEnum}}
+{{/vars}}

modules/openapi-generator/src/main/resources/dart2/enum.mustache

@@ -9,20 +9,27 @@ class {{classname}} {
       {{#description}}
   /// {{description}}
       {{/description}}
-  static const {{classname}} {{{name}}} = const {{classname}}._internal({{{value}}});
+  static const {{classname}} {{{name}}} = {{classname}}._internal({{value}});
     {{/enumVars}}
   {{/allowableValues}}
   
-  {{dataType}} toJson (){
-    return this.value;
+  {{dataType}} toJson () {
+    return value;
+  }
+
+  @override
+  String toString () {
+    return value;
   }
 
   static {{classname}} fromJson({{dataType}} value) {
-    return new {{classname}}TypeTransformer().decode(value);
+    return {{classname}}TypeTransformer().decode(value);
   }
   
   static List<{{classname}}> listFromJson(List<dynamic> json) {
-    return json == null ? new List<{{classname}}>() : json.map((value) => {{classname}}.fromJson(value)).toList();
+    return json == null
+        ? List<{{classname}}>()
+        : json.map((value) => {{classname}}.fromJson(value)).toList();
   }
 }
 

modules/openapi-generator/src/main/resources/dart2/enum_inline.mustache

@@ -0,0 +1,52 @@
+class {{classname}}{{enumName}} {
+  /// The underlying value of this enum member.
+  final {{{dataType}}} value;
+
+  const {{classname}}{{enumName}}._internal(this.value);
+
+  {{#allowableValues}}
+  {{#enumVars}}
+  {{#description}}
+  /// {{description}}
+  {{/description}}
+  static const {{classname}}{{enumName}} {{name}} = {{classname}}{{enumName}}._internal({{{value}}});
+  {{/enumVars}}
+  {{/allowableValues}}
+
+  {{{dataType}}} toJson () {
+    return value;
+  }
+
+  @override
+  String toString () {
+    return value;
+  }
+
+  static {{classname}}{{enumName}} fromJson({{{dataType}}} value) {
+    return {{classname}}{{enumName}}TypeTransformer().decode(value);
+  }
+
+  static List<{{classname}}{{enumName}}> listFromJson(List<dynamic> json) {
+    return json == null
+      ? List<{{classname}}{{enumName}}>()
+      : json.map((value) => {{classname}}{{enumName}}.fromJson(value)).toList();
+  }
+}
+
+class {{classname}}{{enumName}}TypeTransformer {
+
+  dynamic encode({{classname}}{{enumName}} data) {
+    return data.value;
+  }
+
+  {{classname}}{{enumName}} decode(dynamic data) {
+    switch (data) {
+    {{#allowableValues}}
+      {{#enumVars}}
+      case {{{value}}}: return {{classname}}{{enumName}}.{{{name}}};
+      {{/enumVars}}
+    {{/allowableValues}}
+      default: return null;
+    }
+  }
+}

modules/openapi-generator/src/test/java/org/openapitools/codegen/dart/DartModelTest.java

@@ -36,6 +36,7 @@ public class DartModelTest {
                 .addProperties("id", new IntegerSchema())
                 .addProperties("name", new StringSchema())
                 .addProperties("createdAt", new DateTimeSchema())
+                .addProperties("defaultItem", new IntegerSchema()._default(1))
                 .addRequiredItem("id")
                 .addRequiredItem("name");
         final DefaultCodegen codegen = new DartClientCodegen();
@@ -46,7 +47,7 @@ public class DartModelTest {
         Assert.assertEquals(cm.name, "sample");
         Assert.assertEquals(cm.classname, "Sample");
         Assert.assertEquals(cm.description, "a sample model");
-        Assert.assertEquals(cm.vars.size(), 3);
+        Assert.assertEquals(cm.vars.size(), 4);
         // {{imports}} is not used in template
         //Assert.assertEquals(cm.imports.size(), 1);
 
@@ -54,7 +55,7 @@ public class DartModelTest {
         Assert.assertEquals(property1.baseName, "id");
         Assert.assertEquals(property1.dataType, "int");
         Assert.assertEquals(property1.name, "id");
-        Assert.assertEquals(property1.defaultValue, "null");
+        Assert.assertNull(property1.defaultValue);
         Assert.assertEquals(property1.baseType, "int");
         Assert.assertTrue(property1.hasMore);
         Assert.assertTrue(property1.required);
@@ -65,7 +66,7 @@ public class DartModelTest {
         Assert.assertEquals(property2.baseName, "name");
         Assert.assertEquals(property2.dataType, "String");
         Assert.assertEquals(property2.name, "name");
-        Assert.assertEquals(property2.defaultValue, "null");
+        Assert.assertNull(property2.defaultValue);
         Assert.assertEquals(property2.baseType, "String");
         Assert.assertTrue(property2.hasMore);
         Assert.assertTrue(property2.required);
@@ -77,11 +78,20 @@ public class DartModelTest {
         Assert.assertEquals(property3.complexType, "DateTime");
         Assert.assertEquals(property3.dataType, "DateTime");
         Assert.assertEquals(property3.name, "createdAt");
-        Assert.assertEquals(property3.defaultValue, "null");
+        Assert.assertNull(property3.defaultValue);
         Assert.assertEquals(property3.baseType, "DateTime");
-        Assert.assertFalse(property3.hasMore);
+        Assert.assertTrue(property3.hasMore);
         Assert.assertFalse(property3.required);
         Assert.assertFalse(property3.isContainer);
+
+        final CodegenProperty property4 = cm.vars.get(3);
+        Assert.assertEquals(property4.baseName, "defaultItem");
+        Assert.assertEquals(property4.dataType, "int");
+        Assert.assertEquals(property4.defaultValue, "1");
+        Assert.assertEquals(property4.baseType, "int");
+        Assert.assertFalse(property4.hasMore);
+        Assert.assertFalse(property4.required);
+        Assert.assertFalse(property4.isContainer);
     }
 
     @Test(description = "convert a model with list property")
@@ -89,9 +99,9 @@ public class DartModelTest {
         final Schema model = new Schema()
                 .description("a sample model")
                 .addProperties("id", new IntegerSchema())
-                .addProperties("urls", new ArraySchema()
-                        .items(new StringSchema()))
+                .addProperties("urls", new ArraySchema().items(new StringSchema()))
                 .addRequiredItem("id");
+
         final DefaultCodegen codegen = new DartClientCodegen();
         OpenAPI openAPI = TestUtils.createOpenAPIWithOneSchema("sample", model);
         codegen.setOpenAPI(openAPI);
@@ -106,7 +116,7 @@ public class DartModelTest {
         Assert.assertEquals(property1.baseName, "id");
         Assert.assertEquals(property1.dataType, "int");
         Assert.assertEquals(property1.name, "id");
-        Assert.assertEquals(property1.defaultValue, "null");
+        Assert.assertNull(property1.defaultValue);
         Assert.assertEquals(property1.baseType, "int");
         Assert.assertTrue(property1.hasMore);
         Assert.assertTrue(property1.required);

samples/client/petstore/dart/flutter_petstore/openapi/doc/ApiResponse.md

@@ -8,9 +8,9 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**code** | **int** |  | [optional] [default to null]
-**type** | **String** |  | [optional] [default to null]
-**message** | **String** |  | [optional] [default to null]
+**code** | **int** |  | [optional] 
+**type** | **String** |  | [optional] 
+**message** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/Category.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/InlineObject.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**name** | **String** | Updated name of the pet | [optional] [default to null]
-**status** | **String** | Updated status of the pet | [optional] [default to null]
+**name** | **String** | Updated name of the pet | [optional] 
+**status** | **String** | Updated status of the pet | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/InlineObject1.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**additionalMetadata** | **String** | Additional data to pass to server | [optional] [default to null]
-**file** | [**MultipartFile**](File.md) | file to upload | [optional] [default to null]
+**additionalMetadata** | **String** | Additional data to pass to server | [optional] 
+**file** | [**MultipartFile**](File.md) | file to upload | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/Order.md

@@ -8,11 +8,11 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**petId** | **int** |  | [optional] [default to null]
-**quantity** | **int** |  | [optional] [default to null]
-**shipDate** | [**DateTime**](DateTime.md) |  | [optional] [default to null]
-**status** | **String** | Order Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**petId** | **int** |  | [optional] 
+**quantity** | **int** |  | [optional] 
+**shipDate** | [**DateTime**](DateTime.md) |  | [optional] 
+**status** | **String** | Order Status | [optional] 
 **complete** | **bool** |  | [optional] [default to false]
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/dart/flutter_petstore/openapi/doc/Pet.md

@@ -8,12 +8,12 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**category** | [**Category**](Category.md) |  | [optional] [default to null]
-**name** | **String** |  | [default to null]
-**photoUrls** | **List<String>** |  | [default to []]
-**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to []]
-**status** | **String** | pet status in the store | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**category** | [**Category**](Category.md) |  | [optional] 
+**name** | **String** |  | 
+**photoUrls** | **List<String>** |  | [default to const []]
+**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to const []]
+**status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/PetApi.md

@@ -88,8 +88,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| Pet id to delete | [default to null]
- **apiKey** | **String**|  | [optional] [default to null]
+ **petId** | **int**| Pet id to delete | 
+ **apiKey** | **String**|  | [optional] 
 
 ### Return type
 
@@ -134,7 +134,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to []]
+ **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to const []]
 
 ### Return type
 
@@ -179,7 +179,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **tags** | [**List<String>**](String.md)| Tags to filter by | [default to []]
+ **tags** | [**List<String>**](String.md)| Tags to filter by | [default to const []]
 
 ### Return type
 
@@ -226,7 +226,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to return | [default to null]
+ **petId** | **int**| ID of pet to return | 
 
 ### Return type
 
@@ -313,9 +313,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet that needs to be updated | [default to null]
- **name** | **String**| Updated name of the pet | [optional] [default to null]
- **status** | **String**| Updated status of the pet | [optional] [default to null]
+ **petId** | **int**| ID of pet that needs to be updated | 
+ **name** | **String**| Updated name of the pet | [optional] 
+ **status** | **String**| Updated status of the pet | [optional] 
 
 ### Return type
 
@@ -360,9 +360,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to update | [default to null]
- **additionalMetadata** | **String**| Additional data to pass to server | [optional] [default to null]
- **file** | **MultipartFile**| file to upload | [optional] [default to null]
+ **petId** | **int**| ID of pet to update | 
+ **additionalMetadata** | **String**| Additional data to pass to server | [optional] 
+ **file** | **MultipartFile**| file to upload | [optional] 
 
 ### Return type
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/StoreApi.md

@@ -40,7 +40,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **String**| ID of the order that needs to be deleted | [default to null]
+ **orderId** | **String**| ID of the order that needs to be deleted | 
 
 ### Return type
 
@@ -126,7 +126,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **int**| ID of pet that needs to be fetched | [default to null]
+ **orderId** | **int**| ID of pet that needs to be fetched | 
 
 ### Return type
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/Tag.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/User.md

@@ -8,14 +8,14 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**username** | **String** |  | [optional] [default to null]
-**firstName** | **String** |  | [optional] [default to null]
-**lastName** | **String** |  | [optional] [default to null]
-**email** | **String** |  | [optional] [default to null]
-**password** | **String** |  | [optional] [default to null]
-**phone** | **String** |  | [optional] [default to null]
-**userStatus** | **int** | User Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**username** | **String** |  | [optional] 
+**firstName** | **String** |  | [optional] 
+**lastName** | **String** |  | [optional] 
+**email** | **String** |  | [optional] 
+**password** | **String** |  | [optional] 
+**phone** | **String** |  | [optional] 
+**userStatus** | **int** | User Status | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/flutter_petstore/openapi/doc/UserApi.md

@@ -182,7 +182,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be deleted | [default to null]
+ **username** | **String**| The name that needs to be deleted | 
 
 ### Return type
 
@@ -223,7 +223,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be fetched. Use user1 for testing. | [default to null]
+ **username** | **String**| The name that needs to be fetched. Use user1 for testing. | 
 
 ### Return type
 
@@ -265,8 +265,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The user name for login | [default to null]
- **password** | **String**| The password for login in clear text | [default to null]
+ **username** | **String**| The user name for login | 
+ **password** | **String**| The password for login in clear text | 
 
 ### Return type
 
@@ -353,7 +353,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| name that need to be deleted | [default to null]
+ **username** | **String**| name that need to be deleted | 
  **user** | [**User**](User.md)| Updated user object | 
 
 ### Return type

samples/client/petstore/dart/flutter_petstore/openapi/lib/model/pet.dart

@@ -8,9 +8,9 @@ class Pet {
   
   String name = null;
   
-  List<String> photoUrls = [];
+  List<String> photoUrls = const [];
   
-  List<Tag> tags = [];
+  List<Tag> tags = const [];
   /* pet status in the store */
   String status = null;
   //enum statusEnum {  available,  pending,  sold,  };{

samples/client/petstore/dart/openapi-browser-client/doc/ApiResponse.md

@@ -8,9 +8,9 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**code** | **int** |  | [optional] [default to null]
-**type** | **String** |  | [optional] [default to null]
-**message** | **String** |  | [optional] [default to null]
+**code** | **int** |  | [optional] 
+**type** | **String** |  | [optional] 
+**message** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi-browser-client/doc/Category.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi-browser-client/doc/Order.md

@@ -8,11 +8,11 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**petId** | **int** |  | [optional] [default to null]
-**quantity** | **int** |  | [optional] [default to null]
-**shipDate** | [**DateTime**](DateTime.md) |  | [optional] [default to null]
-**status** | **String** | Order Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**petId** | **int** |  | [optional] 
+**quantity** | **int** |  | [optional] 
+**shipDate** | [**DateTime**](DateTime.md) |  | [optional] 
+**status** | **String** | Order Status | [optional] 
 **complete** | **bool** |  | [optional] [default to false]
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/dart/openapi-browser-client/doc/Pet.md

@@ -8,12 +8,12 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**category** | [**Category**](Category.md) |  | [optional] [default to null]
-**name** | **String** |  | [default to null]
-**photoUrls** | **List<String>** |  | [default to []]
-**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to []]
-**status** | **String** | pet status in the store | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**category** | [**Category**](Category.md) |  | [optional] 
+**name** | **String** |  | 
+**photoUrls** | **List<String>** |  | [default to const []]
+**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to const []]
+**status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi-browser-client/doc/PetApi.md

@@ -87,8 +87,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| Pet id to delete | [default to null]
- **apiKey** | **String**|  | [optional] [default to null]
+ **petId** | **int**| Pet id to delete | 
+ **apiKey** | **String**|  | [optional] 
 
 ### Return type
 
@@ -133,7 +133,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to []]
+ **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to const []]
 
 ### Return type
 
@@ -178,7 +178,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **tags** | [**List<String>**](String.md)| Tags to filter by | [default to []]
+ **tags** | [**List<String>**](String.md)| Tags to filter by | [default to const []]
 
 ### Return type
 
@@ -225,7 +225,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to return | [default to null]
+ **petId** | **int**| ID of pet to return | 
 
 ### Return type
 
@@ -311,9 +311,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet that needs to be updated | [default to null]
- **name** | **String**| Updated name of the pet | [optional] [default to null]
- **status** | **String**| Updated status of the pet | [optional] [default to null]
+ **petId** | **int**| ID of pet that needs to be updated | 
+ **name** | **String**| Updated name of the pet | [optional] 
+ **status** | **String**| Updated status of the pet | [optional] 
 
 ### Return type
 
@@ -358,9 +358,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to update | [default to null]
- **additionalMetadata** | **String**| Additional data to pass to server | [optional] [default to null]
- **file** | **MultipartFile**| file to upload | [optional] [default to null]
+ **petId** | **int**| ID of pet to update | 
+ **additionalMetadata** | **String**| Additional data to pass to server | [optional] 
+ **file** | **MultipartFile**| file to upload | [optional] 
 
 ### Return type
 

samples/client/petstore/dart/openapi-browser-client/doc/StoreApi.md

@@ -40,7 +40,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **String**| ID of the order that needs to be deleted | [default to null]
+ **orderId** | **String**| ID of the order that needs to be deleted | 
 
 ### Return type
 
@@ -126,7 +126,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **int**| ID of pet that needs to be fetched | [default to null]
+ **orderId** | **int**| ID of pet that needs to be fetched | 
 
 ### Return type
 

samples/client/petstore/dart/openapi-browser-client/doc/Tag.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi-browser-client/doc/User.md

@@ -8,14 +8,14 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**username** | **String** |  | [optional] [default to null]
-**firstName** | **String** |  | [optional] [default to null]
-**lastName** | **String** |  | [optional] [default to null]
-**email** | **String** |  | [optional] [default to null]
-**password** | **String** |  | [optional] [default to null]
-**phone** | **String** |  | [optional] [default to null]
-**userStatus** | **int** | User Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**username** | **String** |  | [optional] 
+**firstName** | **String** |  | [optional] 
+**lastName** | **String** |  | [optional] 
+**email** | **String** |  | [optional] 
+**password** | **String** |  | [optional] 
+**phone** | **String** |  | [optional] 
+**userStatus** | **int** | User Status | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi-browser-client/doc/UserApi.md

@@ -166,7 +166,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be deleted | [default to null]
+ **username** | **String**| The name that needs to be deleted | 
 
 ### Return type
 
@@ -207,7 +207,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be fetched. Use user1 for testing. | [default to null]
+ **username** | **String**| The name that needs to be fetched. Use user1 for testing. | 
 
 ### Return type
 
@@ -249,8 +249,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The user name for login | [default to null]
- **password** | **String**| The password for login in clear text | [default to null]
+ **username** | **String**| The user name for login | 
+ **password** | **String**| The password for login in clear text | 
 
 ### Return type
 
@@ -329,7 +329,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| name that need to be deleted | [default to null]
+ **username** | **String**| name that need to be deleted | 
  **body** | [**User**](User.md)| Updated user object | 
 
 ### Return type

samples/client/petstore/dart/openapi-browser-client/lib/model/pet.dart

@@ -8,9 +8,9 @@ class Pet {
   
   String name = null;
   
-  List<String> photoUrls = [];
+  List<String> photoUrls = const [];
   
-  List<Tag> tags = [];
+  List<Tag> tags = const [];
   /* pet status in the store */
   String status = null;
   //enum statusEnum {  available,  pending,  sold,  };{

samples/client/petstore/dart/openapi/doc/ApiResponse.md

@@ -8,9 +8,9 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**code** | **int** |  | [optional] [default to null]
-**type** | **String** |  | [optional] [default to null]
-**message** | **String** |  | [optional] [default to null]
+**code** | **int** |  | [optional] 
+**type** | **String** |  | [optional] 
+**message** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi/doc/Category.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi/doc/Order.md

@@ -8,11 +8,11 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**petId** | **int** |  | [optional] [default to null]
-**quantity** | **int** |  | [optional] [default to null]
-**shipDate** | [**DateTime**](DateTime.md) |  | [optional] [default to null]
-**status** | **String** | Order Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**petId** | **int** |  | [optional] 
+**quantity** | **int** |  | [optional] 
+**shipDate** | [**DateTime**](DateTime.md) |  | [optional] 
+**status** | **String** | Order Status | [optional] 
 **complete** | **bool** |  | [optional] [default to false]
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/dart/openapi/doc/Pet.md

@@ -8,12 +8,12 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**category** | [**Category**](Category.md) |  | [optional] [default to null]
-**name** | **String** |  | [default to null]
-**photoUrls** | **List<String>** |  | [default to []]
-**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to []]
-**status** | **String** | pet status in the store | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**category** | [**Category**](Category.md) |  | [optional] 
+**name** | **String** |  | 
+**photoUrls** | **List<String>** |  | [default to const []]
+**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to const []]
+**status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi/doc/PetApi.md

@@ -87,8 +87,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| Pet id to delete | [default to null]
- **apiKey** | **String**|  | [optional] [default to null]
+ **petId** | **int**| Pet id to delete | 
+ **apiKey** | **String**|  | [optional] 
 
 ### Return type
 
@@ -133,7 +133,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to []]
+ **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to const []]
 
 ### Return type
 
@@ -178,7 +178,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **tags** | [**List<String>**](String.md)| Tags to filter by | [default to []]
+ **tags** | [**List<String>**](String.md)| Tags to filter by | [default to const []]
 
 ### Return type
 
@@ -225,7 +225,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to return | [default to null]
+ **petId** | **int**| ID of pet to return | 
 
 ### Return type
 
@@ -311,9 +311,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet that needs to be updated | [default to null]
- **name** | **String**| Updated name of the pet | [optional] [default to null]
- **status** | **String**| Updated status of the pet | [optional] [default to null]
+ **petId** | **int**| ID of pet that needs to be updated | 
+ **name** | **String**| Updated name of the pet | [optional] 
+ **status** | **String**| Updated status of the pet | [optional] 
 
 ### Return type
 
@@ -358,9 +358,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to update | [default to null]
- **additionalMetadata** | **String**| Additional data to pass to server | [optional] [default to null]
- **file** | **MultipartFile**| file to upload | [optional] [default to null]
+ **petId** | **int**| ID of pet to update | 
+ **additionalMetadata** | **String**| Additional data to pass to server | [optional] 
+ **file** | **MultipartFile**| file to upload | [optional] 
 
 ### Return type
 

samples/client/petstore/dart/openapi/doc/StoreApi.md

@@ -40,7 +40,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **String**| ID of the order that needs to be deleted | [default to null]
+ **orderId** | **String**| ID of the order that needs to be deleted | 
 
 ### Return type
 
@@ -126,7 +126,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **int**| ID of pet that needs to be fetched | [default to null]
+ **orderId** | **int**| ID of pet that needs to be fetched | 
 
 ### Return type
 

samples/client/petstore/dart/openapi/doc/Tag.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi/doc/User.md

@@ -8,14 +8,14 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**username** | **String** |  | [optional] [default to null]
-**firstName** | **String** |  | [optional] [default to null]
-**lastName** | **String** |  | [optional] [default to null]
-**email** | **String** |  | [optional] [default to null]
-**password** | **String** |  | [optional] [default to null]
-**phone** | **String** |  | [optional] [default to null]
-**userStatus** | **int** | User Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**username** | **String** |  | [optional] 
+**firstName** | **String** |  | [optional] 
+**lastName** | **String** |  | [optional] 
+**email** | **String** |  | [optional] 
+**password** | **String** |  | [optional] 
+**phone** | **String** |  | [optional] 
+**userStatus** | **int** | User Status | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart/openapi/doc/UserApi.md

@@ -166,7 +166,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be deleted | [default to null]
+ **username** | **String**| The name that needs to be deleted | 
 
 ### Return type
 
@@ -207,7 +207,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be fetched. Use user1 for testing. | [default to null]
+ **username** | **String**| The name that needs to be fetched. Use user1 for testing. | 
 
 ### Return type
 
@@ -249,8 +249,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The user name for login | [default to null]
- **password** | **String**| The password for login in clear text | [default to null]
+ **username** | **String**| The user name for login | 
+ **password** | **String**| The password for login in clear text | 
 
 ### Return type
 
@@ -329,7 +329,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| name that need to be deleted | [default to null]
+ **username** | **String**| name that need to be deleted | 
  **body** | [**User**](User.md)| Updated user object | 
 
 ### Return type

samples/client/petstore/dart/openapi/lib/model/pet.dart

@@ -8,9 +8,9 @@ class Pet {
   
   String name = null;
   
-  List<String> photoUrls = [];
+  List<String> photoUrls = const [];
   
-  List<Tag> tags = [];
+  List<Tag> tags = const [];
   /* pet status in the store */
   String status = null;
   //enum statusEnum {  available,  pending,  sold,  };{

samples/client/petstore/dart2/openapi/lib/model/order.dart

@@ -9,12 +9,10 @@ class Order {
   int quantity = null;
   
   DateTime shipDate = null;
-  /* Order Status */
-  String status = null;
-  //enum statusEnum {  placed,  approved,  delivered,  };{
-  
+  /// Order Status
+  StatusEnum status = null;
+
   bool complete = false;
-  Order();
 
   @override
   String toString() {
@@ -65,12 +63,14 @@ class Order {
   // maps a json object with a list of Order-objects as value to a dart map
   static Map<String, List<Order>> mapListFromJson(Map<String, dynamic> json) {
     var map = Map<String, List<Order>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Order.listFromJson(value);
-       });
-     }
-     return map;
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Order.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
 
+
+enum StatusEnum {  placed,  approved,  delivered,  }

samples/client/petstore/dart2/openapi/lib/model/pet.dart

@@ -11,10 +11,8 @@ class Pet {
   List<String> photoUrls = [];
   
   List<Tag> tags = [];
-  /* pet status in the store */
-  String status = null;
-  //enum statusEnum {  available,  pending,  sold,  };{
-  Pet();
+  /// pet status in the store
+  StatusEnum status = null;
 
   @override
   String toString() {
@@ -69,12 +67,14 @@ class Pet {
   // maps a json object with a list of Pet-objects as value to a dart map
   static Map<String, List<Pet>> mapListFromJson(Map<String, dynamic> json) {
     var map = Map<String, List<Pet>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Pet.listFromJson(value);
-       });
-     }
-     return map;
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Pet.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
 
+
+enum StatusEnum {  available,  pending,  sold,  }

samples/client/petstore/dart2/openapi/lib/model/tag.dart

@@ -5,7 +5,6 @@ class Tag {
   int id = null;
   
   String name = null;
-  Tag();
 
   @override
   String toString() {
@@ -42,12 +41,11 @@ class Tag {
   // maps a json object with a list of Tag-objects as value to a dart map
   static Map<String, List<Tag>> mapListFromJson(Map<String, dynamic> json) {
     var map = Map<String, List<Tag>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Tag.listFromJson(value);
-       });
-     }
-     return map;
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Tag.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
-

samples/client/petstore/dart2/petstore/test/order_model_test.dart

@@ -0,0 +1,9 @@
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+void main() {
+    test('Check if default value is generated', () async {
+      var order = Order();
+      expect(order.complete, equals(false));
+    });
+}

samples/client/petstore/dart2/petstore/test/pet_faked_client_test.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'dart:math';
 
 import 'package:http/http.dart';
 import 'package:openapi/api.dart';
@@ -31,7 +32,7 @@ void main() {
       ..category = category
       ..tags = tags
       ..name = name
-      ..status = status
+      ..status = PetStatusEnum.fromJson(status)
       ..photoUrls = ['https://petstore.com/sample/photo1.jpg'];
   }
 
@@ -188,10 +189,10 @@ void main() {
       final id1 = newId();
       final id2 = newId();
       final id3 = newId();
-      final status = 'available';
+      final status = PetStatusEnum.available_.value;
       final pet1 = makePet(id: id1, status: status);
       final pet2 = makePet(id: id2, status: status);
-      final pet3 = makePet(id: id3, status: 'sold');
+      final pet3 = makePet(id: id3, status: PetStatusEnum.sold_.value);
 
       return Future.wait([addPet(pet1), addPet(pet2), addPet(pet3)])
           .then((_) async {
@@ -202,6 +203,10 @@ void main() {
           getResponseBody: petApi.apiClient.serialize([pet1, pet2]),
         );
         final pets = await petApi.findPetsByStatus([status]);
+
+        // tests serialisation and deserialisation of enum
+        final petsByStatus = pets.where((p) => p.status == PetStatusEnum.available_);
+        expect(petsByStatus.length, equals(2));
         final petIds = pets.map((pet) => pet.id).toList();
         expect(petIds, contains(id1));
         expect(petIds, contains(id2));

samples/client/petstore/dart2/petstore/test/pet_test.dart

@@ -25,14 +25,16 @@ void main() {
         ..id = 124321
         ..name = 'Jose'
     ];
+
     return Pet(
         id : id,
         category: category,
         name: name, //required field
+        tags: tags,
         photoUrls: ['https://petstore.com/sample/photo1.jpg'] //required field
     )
-      ..tags = tags
-      ..status = '';
+      ..status = PetStatusEnum.fromJson(status)
+      ..photoUrls = ['https://petstore.com/sample/photo1.jpg'];
   }
 
   group('Pet API with live client', () {
@@ -79,12 +81,12 @@ void main() {
       var id1 = newId();
       var id2 = newId();
       var id3 = newId();
-      var status = 'available';
+      var status = PetStatusEnum.available_.value;
 
       return Future.wait([
         petApi.addPet(makePet(id: id1, status: status)),
         petApi.addPet(makePet(id: id2, status: status)),
-        petApi.addPet(makePet(id: id3, status: 'sold'))
+        petApi.addPet(makePet(id: id3, status: PetStatusEnum.sold_.value))
       ]).then((_) async {
         var pets = await petApi.findPetsByStatus([status]);
         var petIds = pets.map((pet) => pet.id).toList();

samples/client/petstore/dart2/petstore_client_lib/doc/ApiResponse.md

@@ -8,9 +8,9 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**code** | **int** |  | [optional] [default to null]
-**type** | **String** |  | [optional] [default to null]
-**message** | **String** |  | [optional] [default to null]
+**code** | **int** |  | [optional] 
+**type** | **String** |  | [optional] 
+**message** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart2/petstore_client_lib/doc/Category.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart2/petstore_client_lib/doc/Order.md

@@ -8,11 +8,11 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**petId** | **int** |  | [optional] [default to null]
-**quantity** | **int** |  | [optional] [default to null]
-**shipDate** | [**DateTime**](DateTime.md) |  | [optional] [default to null]
-**status** | **String** | Order Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**petId** | **int** |  | [optional] 
+**quantity** | **int** |  | [optional] 
+**shipDate** | [**DateTime**](DateTime.md) |  | [optional] 
+**status** | **String** | Order Status | [optional] 
 **complete** | **bool** |  | [optional] [default to false]
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/client/petstore/dart2/petstore_client_lib/doc/Pet.md

@@ -8,12 +8,12 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**category** | [**Category**](Category.md) |  | [optional] [default to null]
-**name** | **String** |  | [default to null]
-**photoUrls** | **List<String>** |  | [default to []]
-**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to []]
-**status** | **String** | pet status in the store | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**category** | [**Category**](Category.md) |  | [optional] 
+**name** | **String** |  | 
+**photoUrls** | **List<String>** |  | [default to const []]
+**tags** | [**List<Tag>**](Tag.md) |  | [optional] [default to const []]
+**status** | **String** | pet status in the store | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart2/petstore_client_lib/doc/PetApi.md

@@ -87,8 +87,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| Pet id to delete | [default to null]
- **apiKey** | **String**|  | [optional] [default to null]
+ **petId** | **int**| Pet id to delete | 
+ **apiKey** | **String**|  | [optional] 
 
 ### Return type
 
@@ -133,7 +133,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to []]
+ **status** | [**List<String>**](String.md)| Status values that need to be considered for filter | [default to const []]
 
 ### Return type
 
@@ -178,7 +178,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **tags** | [**List<String>**](String.md)| Tags to filter by | [default to []]
+ **tags** | [**List<String>**](String.md)| Tags to filter by | [default to const []]
 
 ### Return type
 
@@ -225,7 +225,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to return | [default to null]
+ **petId** | **int**| ID of pet to return | 
 
 ### Return type
 
@@ -311,9 +311,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet that needs to be updated | [default to null]
- **name** | **String**| Updated name of the pet | [optional] [default to null]
- **status** | **String**| Updated status of the pet | [optional] [default to null]
+ **petId** | **int**| ID of pet that needs to be updated | 
+ **name** | **String**| Updated name of the pet | [optional] 
+ **status** | **String**| Updated status of the pet | [optional] 
 
 ### Return type
 
@@ -358,9 +358,9 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **petId** | **int**| ID of pet to update | [default to null]
- **additionalMetadata** | **String**| Additional data to pass to server | [optional] [default to null]
- **file** | **MultipartFile**| file to upload | [optional] [default to null]
+ **petId** | **int**| ID of pet to update | 
+ **additionalMetadata** | **String**| Additional data to pass to server | [optional] 
+ **file** | **MultipartFile**| file to upload | [optional] 
 
 ### Return type
 

samples/client/petstore/dart2/petstore_client_lib/doc/StoreApi.md

@@ -40,7 +40,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **String**| ID of the order that needs to be deleted | [default to null]
+ **orderId** | **String**| ID of the order that needs to be deleted | 
 
 ### Return type
 
@@ -126,7 +126,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **orderId** | **int**| ID of pet that needs to be fetched | [default to null]
+ **orderId** | **int**| ID of pet that needs to be fetched | 
 
 ### Return type
 

samples/client/petstore/dart2/petstore_client_lib/doc/Tag.md

@@ -8,8 +8,8 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**name** | **String** |  | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**name** | **String** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart2/petstore_client_lib/doc/User.md

@@ -8,14 +8,14 @@ import 'package:openapi/api.dart';
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**id** | **int** |  | [optional] [default to null]
-**username** | **String** |  | [optional] [default to null]
-**firstName** | **String** |  | [optional] [default to null]
-**lastName** | **String** |  | [optional] [default to null]
-**email** | **String** |  | [optional] [default to null]
-**password** | **String** |  | [optional] [default to null]
-**phone** | **String** |  | [optional] [default to null]
-**userStatus** | **int** | User Status | [optional] [default to null]
+**id** | **int** |  | [optional] 
+**username** | **String** |  | [optional] 
+**firstName** | **String** |  | [optional] 
+**lastName** | **String** |  | [optional] 
+**email** | **String** |  | [optional] 
+**password** | **String** |  | [optional] 
+**phone** | **String** |  | [optional] 
+**userStatus** | **int** | User Status | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

samples/client/petstore/dart2/petstore_client_lib/doc/UserApi.md

@@ -166,7 +166,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be deleted | [default to null]
+ **username** | **String**| The name that needs to be deleted | 
 
 ### Return type
 
@@ -207,7 +207,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The name that needs to be fetched. Use user1 for testing. | [default to null]
+ **username** | **String**| The name that needs to be fetched. Use user1 for testing. | 
 
 ### Return type
 
@@ -249,8 +249,8 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| The user name for login | [default to null]
- **password** | **String**| The password for login in clear text | [default to null]
+ **username** | **String**| The user name for login | 
+ **password** | **String**| The password for login in clear text | 
 
 ### Return type
 
@@ -329,7 +329,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **username** | **String**| name that need to be deleted | [default to null]
+ **username** | **String**| name that need to be deleted | 
  **body** | [**User**](User.md)| Updated user object | 
 
 ### Return type

samples/client/petstore/dart2/petstore_client_lib/lib/model/api_response.dart

@@ -2,11 +2,11 @@ part of openapi.api;
 
 class ApiResponse {
   
-  int code = null;
+  int code;
   
-  String type = null;
+  String type;
   
-  String message = null;
+  String message;
 
   ApiResponse({
     this.code,
@@ -27,7 +27,7 @@ class ApiResponse {
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (code != null)
       json['code'] = code;
     if (type != null)
@@ -42,7 +42,7 @@ class ApiResponse {
   }
 
   static Map<String, ApiResponse> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, ApiResponse>();
+    final map = Map<String, ApiResponse>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = ApiResponse.fromJson(value));
     }
@@ -51,13 +51,13 @@ class ApiResponse {
 
   // maps a json object with a list of ApiResponse-objects as value to a dart map
   static Map<String, List<ApiResponse>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<ApiResponse>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = ApiResponse.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<ApiResponse>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = ApiResponse.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
 

samples/client/petstore/dart2/petstore_client_lib/lib/model/category.dart

@@ -2,9 +2,9 @@ part of openapi.api;
 
 class Category {
   
-  int id = null;
+  int id;
   
-  String name = null;
+  String name;
 
   Category({
     this.id,
@@ -23,7 +23,7 @@ class Category {
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (id != null)
       json['id'] = id;
     if (name != null)
@@ -36,7 +36,7 @@ class Category {
   }
 
   static Map<String, Category> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, Category>();
+    final map = Map<String, Category>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = Category.fromJson(value));
     }
@@ -45,13 +45,13 @@ class Category {
 
   // maps a json object with a list of Category-objects as value to a dart map
   static Map<String, List<Category>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<Category>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Category.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<Category>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Category.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
 

samples/client/petstore/dart2/petstore_client_lib/lib/model/order.dart

@@ -2,16 +2,15 @@ part of openapi.api;
 
 class Order {
   
-  int id = null;
+  int id;
   
-  int petId = null;
+  int petId;
   
-  int quantity = null;
+  int quantity;
   
-  DateTime shipDate = null;
-  /* Order Status */
-  String status = null;
-  //enum statusEnum {  placed,  approved,  delivered,  };{
+  DateTime shipDate;
+  /// Order Status
+  OrderStatusEnum status;
   
   bool complete = false;
 
@@ -21,7 +20,7 @@ class Order {
     this.quantity,
     this.shipDate,
     this.status,
-    this.complete,
+    this.complete = false,
   });
 
   @override
@@ -37,12 +36,12 @@ class Order {
     shipDate = (json['shipDate'] == null) ?
       null :
       DateTime.parse(json['shipDate']);
-    status = json['status'];
+    status = OrderStatusEnum.fromJson(json['status']);
     complete = json['complete'];
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (id != null)
       json['id'] = id;
     if (petId != null)
@@ -52,7 +51,7 @@ class Order {
     if (shipDate != null)
       json['shipDate'] = shipDate == null ? null : shipDate.toUtc().toIso8601String();
     if (status != null)
-      json['status'] = status;
+      json['status'] = status.value;
     if (complete != null)
       json['complete'] = complete;
     return json;
@@ -63,7 +62,7 @@ class Order {
   }
 
   static Map<String, Order> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, Order>();
+    final map = Map<String, Order>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = Order.fromJson(value));
     }
@@ -72,13 +71,62 @@ class Order {
 
   // maps a json object with a list of Order-objects as value to a dart map
   static Map<String, List<Order>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<Order>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Order.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<Order>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Order.listFromJson(value);
+      });
+    }
+    return map;
+  }
+}
+class OrderStatusEnum {
+  /// The underlying value of this enum member.
+  final String value;
+
+  const OrderStatusEnum._internal(this.value);
+
+  /// Order Status
+  static const OrderStatusEnum placed_ = OrderStatusEnum._internal("placed");
+  /// Order Status
+  static const OrderStatusEnum approved_ = OrderStatusEnum._internal("approved");
+  /// Order Status
+  static const OrderStatusEnum delivered_ = OrderStatusEnum._internal("delivered");
+
+  String toJson () {
+    return value;
+  }
+
+  @override
+  String toString () {
+    return value;
+  }
+
+  static OrderStatusEnum fromJson(String value) {
+    return OrderStatusEnumTypeTransformer().decode(value);
+  }
+
+  static List<OrderStatusEnum> listFromJson(List<dynamic> json) {
+    return json == null
+      ? List<OrderStatusEnum>()
+      : json.map((value) => OrderStatusEnum.fromJson(value)).toList();
   }
 }
 
+class OrderStatusEnumTypeTransformer {
+
+  dynamic encode(OrderStatusEnum data) {
+    return data.value;
+  }
+
+  OrderStatusEnum decode(dynamic data) {
+    switch (data) {
+      case "placed": return OrderStatusEnum.placed_;
+      case "approved": return OrderStatusEnum.approved_;
+      case "delivered": return OrderStatusEnum.delivered_;
+      default: return null;
+    }
+  }
+}
+
+

samples/client/petstore/dart2/petstore_client_lib/lib/model/pet.dart

@@ -2,25 +2,24 @@ part of openapi.api;
 
 class Pet {
   
-  int id = null;
+  int id;
   
-  Category category = null;
+  Category category;
   
-  String name = null;
+  String name;
   
-  List<String> photoUrls = [];
+  List<String> photoUrls = const [];
   
-  List<Tag> tags = [];
-  /* pet status in the store */
-  String status = null;
-  //enum statusEnum {  available,  pending,  sold,  };{
+  List<Tag> tags = const [];
+  /// pet status in the store
+  PetStatusEnum status;
 
   Pet({
     this.id,
     this.category,
     @required this.name,
     @required this.photoUrls,
-    this.tags,
+    this.tags = const [],
     this.status,
   });
 
@@ -42,11 +41,11 @@ class Pet {
     tags = (json['tags'] == null) ?
       null :
       Tag.listFromJson(json['tags']);
-    status = json['status'];
+    status = PetStatusEnum.fromJson(json['status']);
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (id != null)
       json['id'] = id;
     if (category != null)
@@ -58,7 +57,7 @@ class Pet {
     if (tags != null)
       json['tags'] = tags;
     if (status != null)
-      json['status'] = status;
+      json['status'] = status.value;
     return json;
   }
 
@@ -67,7 +66,7 @@ class Pet {
   }
 
   static Map<String, Pet> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, Pet>();
+    final map = Map<String, Pet>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = Pet.fromJson(value));
     }
@@ -76,13 +75,62 @@ class Pet {
 
   // maps a json object with a list of Pet-objects as value to a dart map
   static Map<String, List<Pet>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<Pet>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Pet.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<Pet>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Pet.listFromJson(value);
+      });
+    }
+    return map;
+  }
+}
+class PetStatusEnum {
+  /// The underlying value of this enum member.
+  final String value;
+
+  const PetStatusEnum._internal(this.value);
+
+  /// pet status in the store
+  static const PetStatusEnum available_ = PetStatusEnum._internal("available");
+  /// pet status in the store
+  static const PetStatusEnum pending_ = PetStatusEnum._internal("pending");
+  /// pet status in the store
+  static const PetStatusEnum sold_ = PetStatusEnum._internal("sold");
+
+  String toJson () {
+    return value;
+  }
+
+  @override
+  String toString () {
+    return value;
+  }
+
+  static PetStatusEnum fromJson(String value) {
+    return PetStatusEnumTypeTransformer().decode(value);
+  }
+
+  static List<PetStatusEnum> listFromJson(List<dynamic> json) {
+    return json == null
+      ? List<PetStatusEnum>()
+      : json.map((value) => PetStatusEnum.fromJson(value)).toList();
   }
 }
 
+class PetStatusEnumTypeTransformer {
+
+  dynamic encode(PetStatusEnum data) {
+    return data.value;
+  }
+
+  PetStatusEnum decode(dynamic data) {
+    switch (data) {
+      case "available": return PetStatusEnum.available_;
+      case "pending": return PetStatusEnum.pending_;
+      case "sold": return PetStatusEnum.sold_;
+      default: return null;
+    }
+  }
+}
+
+

samples/client/petstore/dart2/petstore_client_lib/lib/model/tag.dart

@@ -2,9 +2,9 @@ part of openapi.api;
 
 class Tag {
   
-  int id = null;
+  int id;
   
-  String name = null;
+  String name;
 
   Tag({
     this.id,
@@ -23,7 +23,7 @@ class Tag {
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (id != null)
       json['id'] = id;
     if (name != null)
@@ -36,7 +36,7 @@ class Tag {
   }
 
   static Map<String, Tag> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, Tag>();
+    final map = Map<String, Tag>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = Tag.fromJson(value));
     }
@@ -45,13 +45,13 @@ class Tag {
 
   // maps a json object with a list of Tag-objects as value to a dart map
   static Map<String, List<Tag>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<Tag>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = Tag.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<Tag>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = Tag.listFromJson(value);
+      });
+    }
+    return map;
   }
 }
 

samples/client/petstore/dart2/petstore_client_lib/lib/model/user.dart

@@ -2,21 +2,21 @@ part of openapi.api;
 
 class User {
   
-  int id = null;
+  int id;
   
-  String username = null;
+  String username;
   
-  String firstName = null;
+  String firstName;
   
-  String lastName = null;
+  String lastName;
   
-  String email = null;
+  String email;
   
-  String password = null;
+  String password;
   
-  String phone = null;
-  /* User Status */
-  int userStatus = null;
+  String phone;
+  /// User Status
+  int userStatus;
 
   User({
     this.id,
@@ -47,7 +47,7 @@ class User {
   }
 
   Map<String, dynamic> toJson() {
-    Map <String, dynamic> json = {};
+    Map<String, dynamic> json = {};
     if (id != null)
       json['id'] = id;
     if (username != null)
@@ -72,7 +72,7 @@ class User {
   }
 
   static Map<String, User> mapFromJson(Map<String, dynamic> json) {
-    var map = Map<String, User>();
+    final map = Map<String, User>();
     if (json != null && json.isNotEmpty) {
       json.forEach((String key, dynamic value) => map[key] = User.fromJson(value));
     }
@@ -81,13 +81,13 @@ class User {
 
   // maps a json object with a list of User-objects as value to a dart map
   static Map<String, List<User>> mapListFromJson(Map<String, dynamic> json) {
-    var map = Map<String, List<User>>();
-     if (json != null && json.isNotEmpty) {
-       json.forEach((String key, dynamic value) {
-         map[key] = User.listFromJson(value);
-       });
-     }
-     return map;
+    final map = Map<String, List<User>>();
+    if (json != null && json.isNotEmpty) {
+      json.forEach((String key, dynamic value) {
+        map[key] = User.listFromJson(value);
+      });
+    }
+    return map;
   }
 }