From 7d338a30be317b9d2bcdf7e6dc3a5a0586eeaed9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Tue, 4 Mar 2025 19:49:20 +0900
Subject: [PATCH 1/8] [dart][dart-dio] Add type information to oneOf and anyOf

---
 .../dio/serialization/built_value/class_members.mustache      | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_members.mustache b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_members.mustache
index 0df06e1e3073..34e3f75a1967 100644
--- a/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_members.mustache
+++ b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_members.mustache
@@ -13,10 +13,10 @@
   {{/allowableValues}}
 
 {{/vendorExtensions.x-self-only-props}}{{#anyOf}}{{#-first}}  /// Any Of {{#anyOf}}[{{{.}}}]{{^-last}}, {{/-last}}{{/anyOf}}
-  AnyOf get anyOf;
+  AnyOf{{anyOf.size}}<{{#anyOf}}{{{.}}}{{^-last}}, {{/-last}}{{/anyOf}}> get anyOf;
 
 {{/-first}}{{/anyOf}}{{#oneOf}}{{#-first}}  /// One Of {{#oneOf}}[{{{.}}}]{{^-last}}, {{/-last}}{{/oneOf}}
-  OneOf get oneOf;
+  OneOf{{oneOf.size}}<{{#oneOf}}{{{.}}}{{^-last}}, {{/-last}}{{/oneOf}}> get oneOf;
 
 {{/-first}}{{/oneOf}}{{#discriminator}}  static const String discriminatorFieldName = r'{{propertyBaseName}}';{{#hasDiscriminatorWithNonEmptyMapping}}
 

From 19736e6d64b07335f719ef2aea3cf55838f9d7bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Tue, 4 Mar 2025 19:53:37 +0900
Subject: [PATCH 2/8] [dart][dart-dio] update sample

---
 .../client/petstore/dart-dio/oneof/lib/src/model/fruit.dart     | 2 +-
 .../lib/src/model/bar_ref_or_value.dart                         | 2 +-
 .../lib/src/model/foo_ref_or_value.dart                         | 2 +-
 .../oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart | 2 +-
 .../dart-dio/oneof_primitive/lib/src/model/example.dart         | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
index 11f8cfa70501..d3932692e357 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
@@ -23,7 +23,7 @@ abstract class Fruit implements Built<Fruit, FruitBuilder> {
   String? get color;
 
   /// One Of [Apple], [Banana]
-  OneOf get oneOf;
+  OneOf2<Apple, Banana> get oneOf;
 
   Fruit._();
 
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
index f880cb557955..f3fcbcb15c11 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
@@ -28,7 +28,7 @@ part 'bar_ref_or_value.g.dart';
 @BuiltValue()
 abstract class BarRefOrValue implements Built<BarRefOrValue, BarRefOrValueBuilder> {
   /// One Of [Bar], [BarRef]
-  OneOf get oneOf;
+  OneOf2<Bar, BarRef> get oneOf;
 
   static const String discriminatorFieldName = r'@type';
 
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
index d8164c5b9073..66ce17cb7229 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
@@ -27,7 +27,7 @@ part 'foo_ref_or_value.g.dart';
 @BuiltValue()
 abstract class FooRefOrValue implements Built<FooRefOrValue, FooRefOrValueBuilder> {
   /// One Of [Foo], [FooRef]
-  OneOf get oneOf;
+  OneOf2<Foo, FooRef> get oneOf;
 
   static const String discriminatorFieldName = r'@type';
 
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
index 31b61361de5e..84ff29129843 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
@@ -25,7 +25,7 @@ abstract class Fruit implements Built<Fruit, FruitBuilder> {
   // enum fruitTypeEnum {  APPLE,  BANANA,  };
 
   /// One Of [Apple], [Banana]
-  OneOf get oneOf;
+  OneOf2<Apple, Banana> get oneOf;
 
   static const String discriminatorFieldName = r'fruitType';
 
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
index 799b77e4e178..c63d28690946 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
@@ -18,7 +18,7 @@ part 'example.g.dart';
 @BuiltValue()
 abstract class Example implements Built<Example, ExampleBuilder> {
   /// One Of [Child], [int]
-  OneOf get oneOf;
+  OneOf2<Child, int> get oneOf;
 
   Example._();
 

From 39ef27fe400f2749d3c714a61cf50c33be192b85 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Wed, 5 Mar 2025 05:20:01 +0900
Subject: [PATCH 3/8] [dart][dart-dio] Add type information to oneOf and anyOf

---
 .../languages/DartDioClientCodegen.java       |  4 +
 .../built_value/class_serializer.mustache     | 12 ++-
 .../built_value/serializers_util.mustache     | 74 +++++++++++++++++++
 3 files changed, 86 insertions(+), 4 deletions(-)
 create mode 100644 modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/serializers_util.mustache

diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartDioClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartDioClientCodegen.java
index 81414c5e03bf..bc3fd94b7f36 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartDioClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartDioClientCodegen.java
@@ -250,6 +250,7 @@ private void configureSerializationLibrary(String srcFolder) {
     private void configureSerializationLibraryBuiltValue(String srcFolder) {
         supportingFiles.add(new SupportingFile("serialization/built_value/serializers.mustache", srcFolder, "serializers.dart"));
         supportingFiles.add(new SupportingFile("serialization/built_value/api_util.mustache", srcFolder, "api_util.dart"));
+        supportingFiles.add(new SupportingFile("serialization/built_value/serializers_util.mustache", srcFolder, "serializers_util.dart"));
 
         typeMapping.put("Array", "BuiltList");
         typeMapping.put("array", "BuiltList");
@@ -557,6 +558,9 @@ private void adaptToDartInheritance(Map<String, ModelsMap> objs) {
             interfaceImports.addAll(cm.allOf);
             interfaceImports.addAll(cm.oneOf);
             interfaceImports.addAll(cm.anyOf);
+            if(!cm.oneOf.isEmpty() || !cm.anyOf.isEmpty()) {
+                interfaceImports.add("package:" + pubName + "/" + sourceFolder + "/serializers_util.dart");
+            }
             cm.imports.addAll(rewriteImports(interfaceImports, true));
         }
     }
diff --git a/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_serializer.mustache b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_serializer.mustache
index 4cd02f3506de..a32b15b463df 100644
--- a/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_serializer.mustache
+++ b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_serializer.mustache
@@ -148,7 +148,9 @@ class _${{classname}}Serializer implements PrimitiveSerializer<{{classname}}> {
         throw UnsupportedError("Couldn't deserialize oneOf for the discriminator value: ${discValue}");
         {{/vendorExtensions.x-is-parent}}
     }
-    result.oneOf = OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult);
+    result.oneOf = oneOfFactory(
+      OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult)
+    )<{{#mappedModels}}{{modelName}}{{^-last}}, {{/-last}}{{/mappedModels}}{{#vendorExtensions.x-is-parent}}{{#mappedModels}}, {{/mappedModels}}${{classname}}{{/vendorExtensions.x-is-parent}}>();
     {{/discriminator}}
     {{/hasDiscriminatorWithNonEmptyMapping}}
     {{^hasDiscriminatorWithNonEmptyMapping}}
@@ -173,7 +175,7 @@ class _${{classname}}Serializer implements PrimitiveSerializer<{{classname}}> {
     {{! has no probs at all, pass the serialized as is }}
     oneOfDataSrc = serialized;
     {{/vendorExtensions.x-has-self-and-ancestor-only-props}}
-    result.oneOf = serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOf;
+    result.oneOf = oneOfFactory(serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOfDynamic)<{{#composedSchemas}}{{#oneOf}}{{{datatypeWithEnum}}}{{^-last}}, {{/-last}}{{/oneOf}}{{/composedSchemas}}>();
     {{/hasDiscriminatorWithNonEmptyMapping}}
     return result.build();
     {{/-first}}
@@ -225,7 +227,9 @@ class _${{classname}}Serializer implements PrimitiveSerializer<{{classname}}> {
         throw UnsupportedError("Couldn't deserialize anyOf for the discriminator value: ${discValue}");
         {{/vendorExtensions.x-is-parent}}
     }
-    result.anyOf = AnyOfDynamic(values: {anyOfTypes.indexOf(anyOfType): anyOfResult}, types: anyOfTypes);
+    result.anyOf = anyOfFactory(
+      AnyOfDynamic(values: {anyOfTypes.indexOf(anyOfType): anyOfResult}, types: anyOfTypes)
+    )<{{#mappedModels}}{{modelName}}{{^-last}}, {{/-last}}{{/mappedModels}}{{#vendorExtensions.x-is-parent}}{{#mappedModels}}, {{/mappedModels}}${{classname}}{{/vendorExtensions.x-is-parent}}>();
     {{/discriminator}}
     {{/hasDiscriminatorWithNonEmptyMapping}}
     {{^hasDiscriminatorWithNonEmptyMapping}}
@@ -250,7 +254,7 @@ class _${{classname}}Serializer implements PrimitiveSerializer<{{classname}}> {
     {{! has no probs at all, pass the serialized as is }}
     anyOfDataSrc = serialized;
     {{/vendorExtensions.x-has-self-and-ancestor-only-props}}
-    result.anyOf = serializers.deserialize(anyOfDataSrc, specifiedType: targetType) as AnyOf;
+    result.anyOf = anyOfFactory(serializers.deserialize(anyOfDataSrc, specifiedType: targetType) as AnyOfDynamic)<{{#composedSchemas}}{{#anyOf}}{{{datatypeWithEnum}}}{{^-last}}, {{/-last}}{{/anyOf}}{{/composedSchemas}}>();
     {{/hasDiscriminatorWithNonEmptyMapping}}
     return result.build();
     {{/-first}}
diff --git a/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/serializers_util.mustache b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/serializers_util.mustache
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/serializers_util.mustache
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}

From 500a84a956d2707c495b8bbd8c1b5dfc4261c0d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Wed, 5 Mar 2025 05:22:12 +0900
Subject: [PATCH 4/8] [dart][dart-dio] update sample

---
 .../dart-dio/oneof/.openapi-generator/FILES   |  1 +
 .../dart-dio/oneof/lib/src/model/fruit.dart   |  3 +-
 .../oneof/lib/src/serializers_util.dart       | 74 +++++++++++++++++++
 .../.openapi-generator/FILES                  |  1 +
 .../lib/src/model/bar_ref_or_value.dart       |  5 +-
 .../lib/src/model/foo_ref_or_value.dart       |  5 +-
 .../lib/src/model/fruit.dart                  |  5 +-
 .../lib/src/serializers_util.dart             | 74 +++++++++++++++++++
 .../oneof_primitive/.openapi-generator/FILES  |  1 +
 .../lib/src/model/example.dart                |  3 +-
 .../lib/src/serializers_util.dart             | 74 +++++++++++++++++++
 .../.openapi-generator/FILES                  |  1 +
 .../lib/src/serializers_util.dart             | 74 +++++++++++++++++++
 13 files changed, 316 insertions(+), 5 deletions(-)
 create mode 100644 samples/openapi3/client/petstore/dart-dio/oneof/lib/src/serializers_util.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/serializers_util.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/serializers_util.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/lib/src/serializers_util.dart

diff --git a/samples/openapi3/client/petstore/dart-dio/oneof/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/oneof/.openapi-generator/FILES
index f1ab7b5540a3..cfdac167076b 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof/.openapi-generator/FILES
+++ b/samples/openapi3/client/petstore/dart-dio/oneof/.openapi-generator/FILES
@@ -20,4 +20,5 @@ lib/src/model/banana.dart
 lib/src/model/date.dart
 lib/src/model/fruit.dart
 lib/src/serializers.dart
+lib/src/serializers_util.dart
 pubspec.yaml
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
index d3932692e357..1cf671b9513c 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/model/fruit.dart
@@ -5,6 +5,7 @@
 // ignore_for_file: unused_element
 import 'package:openapi/src/model/apple.dart';
 import 'package:openapi/src/model/banana.dart';
+import 'package:openapi/src/serializers_util.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 import 'package:one_of/one_of.dart';
@@ -116,7 +117,7 @@ class _$FruitSerializer implements PrimitiveSerializer<Fruit> {
       result: result,
     );
     oneOfDataSrc = unhandled;
-    result.oneOf = serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOf;
+    result.oneOf = oneOfFactory(serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOfDynamic)<Apple, Banana>();
     return result.build();
   }
 }
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/serializers_util.dart b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/serializers_util.dart
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/oneof/lib/src/serializers_util.dart
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/.openapi-generator/FILES
index 5e9dbd5a0777..a0fa851b4883 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/.openapi-generator/FILES
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/.openapi-generator/FILES
@@ -52,4 +52,5 @@ lib/src/model/pasta.dart
 lib/src/model/pizza.dart
 lib/src/model/pizza_speziale.dart
 lib/src/serializers.dart
+lib/src/serializers_util.dart
 pubspec.yaml
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
index f3fcbcb15c11..56c79dddd725 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/bar_ref_or_value.dart
@@ -5,6 +5,7 @@
 // ignore_for_file: unused_element
 import 'package:openapi/src/model/foo_ref_or_value.dart';
 import 'package:openapi/src/model/bar_ref.dart';
+import 'package:openapi/src/serializers_util.dart';
 import 'package:openapi/src/model/bar.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
@@ -128,7 +129,9 @@ class _$BarRefOrValueSerializer implements PrimitiveSerializer<BarRefOrValue> {
       default:
         throw UnsupportedError("Couldn't deserialize oneOf for the discriminator value: ${discValue}");
     }
-    result.oneOf = OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult);
+    result.oneOf = oneOfFactory(
+      OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult)
+    )<Bar, BarRef>();
     return result.build();
   }
 }
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
index 66ce17cb7229..cd60550dfbb2 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/foo_ref_or_value.dart
@@ -4,6 +4,7 @@
 
 // ignore_for_file: unused_element
 import 'package:openapi/src/model/foo.dart';
+import 'package:openapi/src/serializers_util.dart';
 import 'package:openapi/src/model/foo_ref.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
@@ -127,7 +128,9 @@ class _$FooRefOrValueSerializer implements PrimitiveSerializer<FooRefOrValue> {
       default:
         throw UnsupportedError("Couldn't deserialize oneOf for the discriminator value: ${discValue}");
     }
-    result.oneOf = OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult);
+    result.oneOf = oneOfFactory(
+      OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult)
+    )<Foo, FooRef>();
     return result.build();
   }
 }
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
index 84ff29129843..2df328089a73 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/model/fruit.dart
@@ -6,6 +6,7 @@
 import 'package:openapi/src/model/apple.dart';
 import 'package:openapi/src/model/banana.dart';
 import 'package:openapi/src/model/fruit_type.dart';
+import 'package:openapi/src/serializers_util.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 import 'package:one_of/one_of.dart';
@@ -159,7 +160,9 @@ class _$FruitSerializer implements PrimitiveSerializer<Fruit> {
       default:
         throw UnsupportedError("Couldn't deserialize oneOf for the discriminator value: ${discValue}");
     }
-    result.oneOf = OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult);
+    result.oneOf = oneOfFactory(
+      OneOfDynamic(typeIndex: oneOfTypes.indexOf(oneOfType), types: oneOfTypes, value: oneOfResult)
+    )<Apple, Banana>();
     return result.build();
   }
 }
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/serializers_util.dart b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/serializers_util.dart
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/lib/src/serializers_util.dart
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/.openapi-generator/FILES
index 7f2ac59bf645..fca8b5b7dde5 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/.openapi-generator/FILES
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/.openapi-generator/FILES
@@ -18,4 +18,5 @@ lib/src/model/child.dart
 lib/src/model/date.dart
 lib/src/model/example.dart
 lib/src/serializers.dart
+lib/src/serializers_util.dart
 pubspec.yaml
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
index c63d28690946..98fac4f6bbbf 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/model/example.dart
@@ -4,6 +4,7 @@
 
 // ignore_for_file: unused_element
 import 'package:openapi/src/model/child.dart';
+import 'package:openapi/src/serializers_util.dart';
 import 'dart:core';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
@@ -65,7 +66,7 @@ class _$ExampleSerializer implements PrimitiveSerializer<Example> {
     Object? oneOfDataSrc;
     final targetType = const FullType(OneOf, [FullType(Child), FullType(int), ]);
     oneOfDataSrc = serialized;
-    result.oneOf = serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOf;
+    result.oneOf = oneOfFactory(serializers.deserialize(oneOfDataSrc, specifiedType: targetType) as OneOfDynamic)<Child, int>();
     return result.build();
   }
 }
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/serializers_util.dart b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/serializers_util.dart
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_primitive/lib/src/serializers_util.dart
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/.openapi-generator/FILES
index 21ad1188dd90..db69a186b0bc 100644
--- a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/.openapi-generator/FILES
+++ b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/.openapi-generator/FILES
@@ -126,4 +126,5 @@ lib/src/model/tag.dart
 lib/src/model/test_inline_freeform_additional_properties_request.dart
 lib/src/model/user.dart
 lib/src/serializers.dart
+lib/src/serializers_util.dart
 pubspec.yaml
diff --git a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/lib/src/serializers_util.dart b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/lib/src/serializers_util.dart
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake/lib/src/serializers_util.dart
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}

From c6e9dc344ec79cee1243ee69f57c62b509cbfa03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Wed, 5 Mar 2025 05:22:40 +0900
Subject: [PATCH 5/8] [dart][dart-dio] add anyof test

---
 bin/configs/dart-dio-anyof.yaml | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 bin/configs/dart-dio-anyof.yaml

diff --git a/bin/configs/dart-dio-anyof.yaml b/bin/configs/dart-dio-anyof.yaml
new file mode 100644
index 000000000000..da2a92019ffa
--- /dev/null
+++ b/bin/configs/dart-dio-anyof.yaml
@@ -0,0 +1,11 @@
+generatorName: dart-dio
+outputDir: samples/openapi3/client/petstore/dart-dio/anyof
+inputSpec: modules/openapi-generator/src/test/resources/3_0/anyOf.yaml
+templateDir: modules/openapi-generator/src/main/resources/dart/libraries/dio
+typeMappings:
+  Client: "ModelClient"
+  File: "ModelFile"
+  EnumClass: "ModelEnumClass"
+additionalProperties:
+  hideGenerationTimestamp: "true"
+  enumUnknownDefaultCase: "true"

From a029b20a46ea10619862a615f96dc697a2aa7403 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Wed, 5 Mar 2025 05:25:26 +0900
Subject: [PATCH 6/8] [dart][dart-dio] update sample

---
 .../client/petstore/dart-dio/anyof/.gitignore |  41 ++++++
 .../dart-dio/anyof/.openapi-generator-ignore  |  23 ++++
 .../dart-dio/anyof/.openapi-generator/FILES   |  29 ++++
 .../dart-dio/anyof/.openapi-generator/VERSION |   1 +
 .../client/petstore/dart-dio/anyof/README.md  |  85 ++++++++++++
 .../dart-dio/anyof/analysis_options.yaml      |   9 ++
 .../petstore/dart-dio/anyof/doc/Apple.md      |  15 +++
 .../petstore/dart-dio/anyof/doc/Banana.md     |  15 +++
 .../petstore/dart-dio/anyof/doc/DefaultApi.md |  51 +++++++
 .../petstore/dart-dio/anyof/doc/Fruit.md      |  17 +++
 .../petstore/dart-dio/anyof/lib/openapi.dart  |  18 +++
 .../petstore/dart-dio/anyof/lib/src/api.dart  |  73 ++++++++++
 .../anyof/lib/src/api/default_api.dart        |  94 +++++++++++++
 .../dart-dio/anyof/lib/src/api_util.dart      |  77 +++++++++++
 .../anyof/lib/src/auth/api_key_auth.dart      |  30 +++++
 .../dart-dio/anyof/lib/src/auth/auth.dart     |  18 +++
 .../anyof/lib/src/auth/basic_auth.dart        |  37 ++++++
 .../anyof/lib/src/auth/bearer_auth.dart       |  26 ++++
 .../dart-dio/anyof/lib/src/auth/oauth.dart    |  26 ++++
 .../anyof/lib/src/date_serializer.dart        |  31 +++++
 .../dart-dio/anyof/lib/src/model/apple.dart   | 108 +++++++++++++++
 .../dart-dio/anyof/lib/src/model/banana.dart  | 108 +++++++++++++++
 .../dart-dio/anyof/lib/src/model/date.dart    |  70 ++++++++++
 .../dart-dio/anyof/lib/src/model/fruit.dart   | 125 ++++++++++++++++++
 .../dart-dio/anyof/lib/src/serializers.dart   |  36 +++++
 .../anyof/lib/src/serializers_util.dart       |  74 +++++++++++
 .../petstore/dart-dio/anyof/pubspec.yaml      |  20 +++
 .../dart-dio/anyof/test/apple_test.dart       |  16 +++
 .../dart-dio/anyof/test/banana_test.dart      |  16 +++
 .../dart-dio/anyof/test/default_api_test.dart |  16 +++
 .../dart-dio/anyof/test/fruit_test.dart       |  26 ++++
 31 files changed, 1331 insertions(+)
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/.gitignore
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator-ignore
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/VERSION
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/README.md
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/analysis_options.yaml
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/doc/Apple.md
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/doc/Banana.md
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/doc/DefaultApi.md
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/doc/Fruit.md
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/openapi.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api/default_api.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api_util.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/api_key_auth.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/auth.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/basic_auth.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/bearer_auth.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/oauth.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/date_serializer.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/apple.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/banana.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/date.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/fruit.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers_util.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/pubspec.yaml
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/test/apple_test.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/test/banana_test.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/test/default_api_test.dart
 create mode 100644 samples/openapi3/client/petstore/dart-dio/anyof/test/fruit_test.dart

diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/.gitignore b/samples/openapi3/client/petstore/dart-dio/anyof/.gitignore
new file mode 100644
index 000000000000..4298cdcbd1a2
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/.gitignore
@@ -0,0 +1,41 @@
+# See https://dart.dev/guides/libraries/private-files
+
+# Files and directories created by pub
+.dart_tool/
+.buildlog
+.packages
+.project
+.pub/
+build/
+**/packages/
+
+# Files created by dart2js
+# (Most Dart developers will use pub build to compile Dart, use/modify these
+#  rules if you intend to use dart2js directly
+#  Convention is to use extension '.dart.js' for Dart compiled to Javascript to
+#  differentiate from explicit Javascript files)
+*.dart.js
+*.part.js
+*.js.deps
+*.js.map
+*.info.json
+
+# Directory created by dartdoc
+doc/api/
+
+# Don't commit pubspec lock file
+# (Library packages only! Remove pattern if developing an application package)
+pubspec.lock
+
+# Don’t commit files and directories created by other development environments.
+# For example, if your development environment creates any of the following files,
+# consider putting them in a global ignore file:
+
+# IntelliJ
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# Mac
+.DS_Store
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator-ignore b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator-ignore
new file mode 100644
index 000000000000..7484ee590a38
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator-ignore
@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
new file mode 100644
index 000000000000..67195a16eea9
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
@@ -0,0 +1,29 @@
+.gitignore
+.openapi-generator-ignore
+README.md
+analysis_options.yaml
+doc/Apple.md
+doc/Banana.md
+doc/DefaultApi.md
+doc/Fruit.md
+lib/openapi.dart
+lib/src/api.dart
+lib/src/api/default_api.dart
+lib/src/api_util.dart
+lib/src/auth/api_key_auth.dart
+lib/src/auth/auth.dart
+lib/src/auth/basic_auth.dart
+lib/src/auth/bearer_auth.dart
+lib/src/auth/oauth.dart
+lib/src/date_serializer.dart
+lib/src/model/apple.dart
+lib/src/model/banana.dart
+lib/src/model/date.dart
+lib/src/model/fruit.dart
+lib/src/serializers.dart
+lib/src/serializers_util.dart
+pubspec.yaml
+test/apple_test.dart
+test/banana_test.dart
+test/default_api_test.dart
+test/fruit_test.dart
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/VERSION b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/VERSION
new file mode 100644
index 000000000000..96cfbb19ae28
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/VERSION
@@ -0,0 +1 @@
+7.13.0-SNAPSHOT
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/README.md b/samples/openapi3/client/petstore/dart-dio/anyof/README.md
new file mode 100644
index 000000000000..9e65e355c0fe
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/README.md
@@ -0,0 +1,85 @@
+# openapi (EXPERIMENTAL)
+No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+
+This Dart package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
+
+- API version: 0.0.1
+- Generator version: 7.13.0-SNAPSHOT
+- Build package: org.openapitools.codegen.languages.DartDioClientCodegen
+
+## Requirements
+
+* Dart 2.15.0+ or Flutter 2.8.0+
+* Dio 5.0.0+ (https://pub.dev/packages/dio)
+
+## Installation & Usage
+
+### pub.dev
+To use the package from [pub.dev](https://pub.dev), please include the following in pubspec.yaml
+```yaml
+dependencies:
+  openapi: 1.0.0
+```
+
+### Github
+If this Dart package is published to Github, please include the following in pubspec.yaml
+```yaml
+dependencies:
+  openapi:
+    git:
+      url: https://github.com/GIT_USER_ID/GIT_REPO_ID.git
+      #ref: main
+```
+
+### Local development
+To use the package from your local drive, please include the following in pubspec.yaml
+```yaml
+dependencies:
+  openapi:
+    path: /path/to/openapi
+```
+
+## Getting Started
+
+Please follow the [installation procedure](#installation--usage) and then run the following:
+
+```dart
+import 'package:openapi/openapi.dart';
+
+
+final api = Openapi().getDefaultApi();
+
+try {
+    final response = await api.rootGet();
+    print(response);
+} catch on DioException (e) {
+    print("Exception when calling DefaultApi->rootGet: $e\n");
+}
+
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *http://localhost*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+[*DefaultApi*](doc/DefaultApi.md) | [**rootGet**](doc/DefaultApi.md#rootget) | **GET** / | 
+
+
+## Documentation For Models
+
+ - [Apple](doc/Apple.md)
+ - [Banana](doc/Banana.md)
+ - [Fruit](doc/Fruit.md)
+
+
+## Documentation For Authorization
+
+Endpoints do not require authorization.
+
+
+## Author
+
+
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/analysis_options.yaml b/samples/openapi3/client/petstore/dart-dio/anyof/analysis_options.yaml
new file mode 100644
index 000000000000..16a95850087a
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/analysis_options.yaml
@@ -0,0 +1,9 @@
+analyzer:
+  language:
+    strict-inference: true
+    strict-raw-types: true
+    strict-casts: false
+  exclude:
+    - test/*.dart
+  errors:
+    deprecated_member_use_from_same_package: ignore
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/doc/Apple.md b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Apple.md
new file mode 100644
index 000000000000..c7f711b87cef
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Apple.md
@@ -0,0 +1,15 @@
+# openapi.model.Apple
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**kind** | **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)
+
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/doc/Banana.md b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Banana.md
new file mode 100644
index 000000000000..bef8a58a4276
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Banana.md
@@ -0,0 +1,15 @@
+# openapi.model.Banana
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**count** | **num** |  | [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)
+
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/doc/DefaultApi.md b/samples/openapi3/client/petstore/dart-dio/anyof/doc/DefaultApi.md
new file mode 100644
index 000000000000..b010661371f9
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/doc/DefaultApi.md
@@ -0,0 +1,51 @@
+# openapi.api.DefaultApi
+
+## Load the API package
+```dart
+import 'package:openapi/api.dart';
+```
+
+All URIs are relative to *http://localhost*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**rootGet**](DefaultApi.md#rootget) | **GET** / | 
+
+
+# **rootGet**
+> Fruit rootGet()
+
+
+
+### Example
+```dart
+import 'package:openapi/api.dart';
+
+final api = Openapi().getDefaultApi();
+
+try {
+    final response = api.rootGet();
+    print(response);
+} catch on DioException (e) {
+    print('Exception when calling DefaultApi->rootGet: $e\n');
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+[**Fruit**](Fruit.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/doc/Fruit.md b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Fruit.md
new file mode 100644
index 000000000000..5d48cc6e6d38
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/doc/Fruit.md
@@ -0,0 +1,17 @@
+# openapi.model.Fruit
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**color** | **String** |  | [optional] 
+**kind** | **String** |  | [optional] 
+**count** | **num** |  | [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)
+
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/openapi.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/openapi.dart
new file mode 100644
index 000000000000..bdddadb4c579
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/openapi.dart
@@ -0,0 +1,18 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+export 'package:openapi/src/api.dart';
+export 'package:openapi/src/auth/api_key_auth.dart';
+export 'package:openapi/src/auth/basic_auth.dart';
+export 'package:openapi/src/auth/bearer_auth.dart';
+export 'package:openapi/src/auth/oauth.dart';
+export 'package:openapi/src/serializers.dart';
+export 'package:openapi/src/model/date.dart';
+
+export 'package:openapi/src/api/default_api.dart';
+
+export 'package:openapi/src/model/apple.dart';
+export 'package:openapi/src/model/banana.dart';
+export 'package:openapi/src/model/fruit.dart';
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api.dart
new file mode 100644
index 000000000000..dfd8e847bdd9
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api.dart
@@ -0,0 +1,73 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'package:dio/dio.dart';
+import 'package:built_value/serializer.dart';
+import 'package:openapi/src/serializers.dart';
+import 'package:openapi/src/auth/api_key_auth.dart';
+import 'package:openapi/src/auth/basic_auth.dart';
+import 'package:openapi/src/auth/bearer_auth.dart';
+import 'package:openapi/src/auth/oauth.dart';
+import 'package:openapi/src/api/default_api.dart';
+
+class Openapi {
+  static const String basePath = r'http://localhost';
+
+  final Dio dio;
+  final Serializers serializers;
+
+  Openapi({
+    Dio? dio,
+    Serializers? serializers,
+    String? basePathOverride,
+    List<Interceptor>? interceptors,
+  })  : this.serializers = serializers ?? standardSerializers,
+        this.dio = dio ??
+            Dio(BaseOptions(
+              baseUrl: basePathOverride ?? basePath,
+              connectTimeout: const Duration(milliseconds: 5000),
+              receiveTimeout: const Duration(milliseconds: 3000),
+            )) {
+    if (interceptors == null) {
+      this.dio.interceptors.addAll([
+        OAuthInterceptor(),
+        BasicAuthInterceptor(),
+        BearerAuthInterceptor(),
+        ApiKeyAuthInterceptor(),
+      ]);
+    } else {
+      this.dio.interceptors.addAll(interceptors);
+    }
+  }
+
+  void setOAuthToken(String name, String token) {
+    if (this.dio.interceptors.any((i) => i is OAuthInterceptor)) {
+      (this.dio.interceptors.firstWhere((i) => i is OAuthInterceptor) as OAuthInterceptor).tokens[name] = token;
+    }
+  }
+
+  void setBearerAuth(String name, String token) {
+    if (this.dio.interceptors.any((i) => i is BearerAuthInterceptor)) {
+      (this.dio.interceptors.firstWhere((i) => i is BearerAuthInterceptor) as BearerAuthInterceptor).tokens[name] = token;
+    }
+  }
+
+  void setBasicAuth(String name, String username, String password) {
+    if (this.dio.interceptors.any((i) => i is BasicAuthInterceptor)) {
+      (this.dio.interceptors.firstWhere((i) => i is BasicAuthInterceptor) as BasicAuthInterceptor).authInfo[name] = BasicAuthInfo(username, password);
+    }
+  }
+
+  void setApiKey(String name, String apiKey) {
+    if (this.dio.interceptors.any((i) => i is ApiKeyAuthInterceptor)) {
+      (this.dio.interceptors.firstWhere((element) => element is ApiKeyAuthInterceptor) as ApiKeyAuthInterceptor).apiKeys[name] = apiKey;
+    }
+  }
+
+  /// Get DefaultApi instance, base route and serializer can be overridden by a given but be careful,
+  /// by doing that all interceptors will not be executed
+  DefaultApi getDefaultApi() {
+    return DefaultApi(dio, serializers);
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api/default_api.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api/default_api.dart
new file mode 100644
index 000000000000..64c4b4eff3b6
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api/default_api.dart
@@ -0,0 +1,94 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'dart:async';
+
+import 'package:built_value/json_object.dart';
+import 'package:built_value/serializer.dart';
+import 'package:dio/dio.dart';
+
+import 'package:openapi/src/model/fruit.dart';
+
+class DefaultApi {
+
+  final Dio _dio;
+
+  final Serializers _serializers;
+
+  const DefaultApi(this._dio, this._serializers);
+
+  /// rootGet
+  /// 
+  ///
+  /// Parameters:
+  /// * [cancelToken] - A [CancelToken] that can be used to cancel the operation
+  /// * [headers] - Can be used to add additional headers to the request
+  /// * [extras] - Can be used to add flags to the request
+  /// * [validateStatus] - A [ValidateStatus] callback that can be used to determine request success based on the HTTP status of the response
+  /// * [onSendProgress] - A [ProgressCallback] that can be used to get the send progress
+  /// * [onReceiveProgress] - A [ProgressCallback] that can be used to get the receive progress
+  ///
+  /// Returns a [Future] containing a [Response] with a [Fruit] as data
+  /// Throws [DioException] if API call or serialization fails
+  Future<Response<Fruit>> rootGet({ 
+    CancelToken? cancelToken,
+    Map<String, dynamic>? headers,
+    Map<String, dynamic>? extra,
+    ValidateStatus? validateStatus,
+    ProgressCallback? onSendProgress,
+    ProgressCallback? onReceiveProgress,
+  }) async {
+    final _path = r'/';
+    final _options = Options(
+      method: r'GET',
+      headers: <String, dynamic>{
+        ...?headers,
+      },
+      extra: <String, dynamic>{
+        'secure': <Map<String, String>>[],
+        ...?extra,
+      },
+      validateStatus: validateStatus,
+    );
+
+    final _response = await _dio.request<Object>(
+      _path,
+      options: _options,
+      cancelToken: cancelToken,
+      onSendProgress: onSendProgress,
+      onReceiveProgress: onReceiveProgress,
+    );
+
+    Fruit? _responseData;
+
+    try {
+      final rawResponse = _response.data;
+      _responseData = rawResponse == null ? null : _serializers.deserialize(
+        rawResponse,
+        specifiedType: const FullType(Fruit),
+      ) as Fruit;
+
+    } catch (error, stackTrace) {
+      throw DioException(
+        requestOptions: _response.requestOptions,
+        response: _response,
+        type: DioExceptionType.unknown,
+        error: error,
+        stackTrace: stackTrace,
+      );
+    }
+
+    return Response<Fruit>(
+      data: _responseData,
+      headers: _response.headers,
+      isRedirect: _response.isRedirect,
+      requestOptions: _response.requestOptions,
+      redirects: _response.redirects,
+      statusCode: _response.statusCode,
+      statusMessage: _response.statusMessage,
+      extra: _response.extra,
+    );
+  }
+
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api_util.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api_util.dart
new file mode 100644
index 000000000000..ed3bb12f25b8
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/api_util.dart
@@ -0,0 +1,77 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:built_collection/built_collection.dart';
+import 'package:built_value/serializer.dart';
+import 'package:dio/dio.dart';
+
+/// Format the given form parameter object into something that Dio can handle.
+/// Returns primitive or String.
+/// Returns List/Map if the value is BuildList/BuiltMap.
+dynamic encodeFormParameter(Serializers serializers, dynamic value, FullType type) {
+  if (value == null) {
+    return '';
+  }
+  if (value is String || value is num || value is bool) {
+    return value;
+  }
+  final serialized = serializers.serialize(
+    value as Object,
+    specifiedType: type,
+  );
+  if (serialized is String) {
+    return serialized;
+  }
+  if (value is BuiltList || value is BuiltSet || value is BuiltMap) {
+    return serialized;
+  }
+  return json.encode(serialized);
+}
+
+dynamic encodeQueryParameter(
+  Serializers serializers,
+  dynamic value,
+  FullType type,
+) {
+  if (value == null) {
+    return '';
+  }
+  if (value is String || value is num || value is bool) {
+    return value;
+  }
+  if (value is Uint8List) {
+    // Currently not sure how to serialize this
+    return value;
+  }
+  final serialized = serializers.serialize(
+    value as Object,
+    specifiedType: type,
+  );
+  if (serialized == null) {
+    return '';
+  }
+  if (serialized is String) {
+    return serialized;
+  }
+  return serialized;
+}
+
+ListParam<Object?> encodeCollectionQueryParameter<T>(
+  Serializers serializers,
+  dynamic value,
+  FullType type, {
+  ListFormat format = ListFormat.multi,
+}) {
+  final serialized = serializers.serialize(
+    value as Object,
+    specifiedType: type,
+  );
+  if (value is BuiltList<T> || value is BuiltSet<T>) {
+    return ListParam(List.of((serialized as Iterable<Object?>).cast()), format);
+  }
+  throw ArgumentError('Invalid value passed to encodeCollectionQueryParameter');
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/api_key_auth.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/api_key_auth.dart
new file mode 100644
index 000000000000..ee16e3f0f92f
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/api_key_auth.dart
@@ -0,0 +1,30 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+
+import 'package:dio/dio.dart';
+import 'package:openapi/src/auth/auth.dart';
+
+class ApiKeyAuthInterceptor extends AuthInterceptor {
+  final Map<String, String> apiKeys = {};
+
+  @override
+  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
+    final authInfo = getAuthInfo(options, (secure) => secure['type'] == 'apiKey');
+    for (final info in authInfo) {
+      final authName = info['name'] as String;
+      final authKeyName = info['keyName'] as String;
+      final authWhere = info['where'] as String;
+      final apiKey = apiKeys[authName];
+      if (apiKey != null) {
+        if (authWhere == 'query') {
+          options.queryParameters[authKeyName] = apiKey;
+        } else {
+          options.headers[authKeyName] = apiKey;
+        }
+      }
+    }
+    super.onRequest(options, handler);
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/auth.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/auth.dart
new file mode 100644
index 000000000000..f7ae9bf3f11e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/auth.dart
@@ -0,0 +1,18 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'package:dio/dio.dart';
+
+abstract class AuthInterceptor extends Interceptor {
+  /// Get auth information on given route for the given type.
+  /// Can return an empty list if type is not present on auth data or
+  /// if route doesn't need authentication.
+  List<Map<String, String>> getAuthInfo(RequestOptions route, bool Function(Map<String, String> secure) handles) {
+    if (route.extra.containsKey('secure')) {
+      final auth = route.extra['secure'] as List<Map<String, String>>;
+      return auth.where((secure) => handles(secure)).toList();
+    }
+    return [];
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/basic_auth.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/basic_auth.dart
new file mode 100644
index 000000000000..b65ccb5b71f7
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/basic_auth.dart
@@ -0,0 +1,37 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'dart:convert';
+
+import 'package:dio/dio.dart';
+import 'package:openapi/src/auth/auth.dart';
+
+class BasicAuthInfo {
+  final String username;
+  final String password;
+
+  const BasicAuthInfo(this.username, this.password);
+}
+
+class BasicAuthInterceptor extends AuthInterceptor {
+  final Map<String, BasicAuthInfo> authInfo = {};
+
+  @override
+  void onRequest(
+    RequestOptions options,
+    RequestInterceptorHandler handler,
+  ) {
+    final metadataAuthInfo = getAuthInfo(options, (secure) => (secure['type'] == 'http' && secure['scheme']?.toLowerCase() == 'basic') || secure['type'] == 'basic');
+    for (final info in metadataAuthInfo) {
+      final authName = info['name'] as String;
+      final basicAuthInfo = authInfo[authName];
+      if (basicAuthInfo != null) {
+        final basicAuth = 'Basic ${base64Encode(utf8.encode('${basicAuthInfo.username}:${basicAuthInfo.password}'))}';
+        options.headers['Authorization'] = basicAuth;
+        break;
+      }
+    }
+    super.onRequest(options, handler);
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/bearer_auth.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/bearer_auth.dart
new file mode 100644
index 000000000000..8f46678761b2
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/bearer_auth.dart
@@ -0,0 +1,26 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'package:dio/dio.dart';
+import 'package:openapi/src/auth/auth.dart';
+
+class BearerAuthInterceptor extends AuthInterceptor {
+  final Map<String, String> tokens = {};
+
+  @override
+  void onRequest(
+    RequestOptions options,
+    RequestInterceptorHandler handler,
+  ) {
+    final authInfo = getAuthInfo(options, (secure) => secure['type'] == 'http' && secure['scheme']?.toLowerCase() == 'bearer');
+    for (final info in authInfo) {
+      final token = tokens[info['name']];
+      if (token != null) {
+        options.headers['Authorization'] = 'Bearer ${token}';
+        break;
+      }
+    }
+    super.onRequest(options, handler);
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/oauth.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/oauth.dart
new file mode 100644
index 000000000000..337cf762b0ce
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/auth/oauth.dart
@@ -0,0 +1,26 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'package:dio/dio.dart';
+import 'package:openapi/src/auth/auth.dart';
+
+class OAuthInterceptor extends AuthInterceptor {
+  final Map<String, String> tokens = {};
+
+  @override
+  void onRequest(
+    RequestOptions options,
+    RequestInterceptorHandler handler,
+  ) {
+    final authInfo = getAuthInfo(options, (secure) => secure['type'] == 'oauth' || secure['type'] == 'oauth2');
+    for (final info in authInfo) {
+      final token = tokens[info['name']];
+      if (token != null) {
+        options.headers['Authorization'] = 'Bearer ${token}';
+        break;
+      }
+    }
+    super.onRequest(options, handler);
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/date_serializer.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/date_serializer.dart
new file mode 100644
index 000000000000..db3c5c437db1
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/date_serializer.dart
@@ -0,0 +1,31 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+import 'package:built_collection/built_collection.dart';
+import 'package:built_value/serializer.dart';
+import 'package:openapi/src/model/date.dart';
+
+class DateSerializer implements PrimitiveSerializer<Date> {
+
+  const DateSerializer();
+
+  @override
+  Iterable<Type> get types => BuiltList.of([Date]);
+
+  @override
+  String get wireName => 'Date';
+
+  @override
+  Date deserialize(Serializers serializers, Object serialized,
+      {FullType specifiedType = FullType.unspecified}) {
+    final parsed = DateTime.parse(serialized as String);
+    return Date(parsed.year, parsed.month, parsed.day);
+  }
+
+  @override
+  Object serialize(Serializers serializers, Date date,
+      {FullType specifiedType = FullType.unspecified}) {
+    return date.toString();
+  }
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/apple.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/apple.dart
new file mode 100644
index 000000000000..02ca94190b96
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/apple.dart
@@ -0,0 +1,108 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+// ignore_for_file: unused_element
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+part 'apple.g.dart';
+
+/// Apple
+///
+/// Properties:
+/// * [kind] 
+@BuiltValue()
+abstract class Apple implements Built<Apple, AppleBuilder> {
+  @BuiltValueField(wireName: r'kind')
+  String? get kind;
+
+  Apple._();
+
+  factory Apple([void updates(AppleBuilder b)]) = _$Apple;
+
+  @BuiltValueHook(initializeBuilder: true)
+  static void _defaults(AppleBuilder b) => b;
+
+  @BuiltValueSerializer(custom: true)
+  static Serializer<Apple> get serializer => _$AppleSerializer();
+}
+
+class _$AppleSerializer implements PrimitiveSerializer<Apple> {
+  @override
+  final Iterable<Type> types = const [Apple, _$Apple];
+
+  @override
+  final String wireName = r'Apple';
+
+  Iterable<Object?> _serializeProperties(
+    Serializers serializers,
+    Apple object, {
+    FullType specifiedType = FullType.unspecified,
+  }) sync* {
+    if (object.kind != null) {
+      yield r'kind';
+      yield serializers.serialize(
+        object.kind,
+        specifiedType: const FullType(String),
+      );
+    }
+  }
+
+  @override
+  Object serialize(
+    Serializers serializers,
+    Apple object, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    return _serializeProperties(serializers, object, specifiedType: specifiedType).toList();
+  }
+
+  void _deserializeProperties(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+    required List<Object?> serializedList,
+    required AppleBuilder result,
+    required List<Object?> unhandled,
+  }) {
+    for (var i = 0; i < serializedList.length; i += 2) {
+      final key = serializedList[i] as String;
+      final value = serializedList[i + 1];
+      switch (key) {
+        case r'kind':
+          final valueDes = serializers.deserialize(
+            value,
+            specifiedType: const FullType(String),
+          ) as String;
+          result.kind = valueDes;
+          break;
+        default:
+          unhandled.add(key);
+          unhandled.add(value);
+          break;
+      }
+    }
+  }
+
+  @override
+  Apple deserialize(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    final result = AppleBuilder();
+    final serializedList = (serialized as Iterable<Object?>).toList();
+    final unhandled = <Object?>[];
+    _deserializeProperties(
+      serializers,
+      serialized,
+      specifiedType: specifiedType,
+      serializedList: serializedList,
+      unhandled: unhandled,
+      result: result,
+    );
+    return result.build();
+  }
+}
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/banana.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/banana.dart
new file mode 100644
index 000000000000..bf2d632ee114
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/banana.dart
@@ -0,0 +1,108 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+// ignore_for_file: unused_element
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+part 'banana.g.dart';
+
+/// Banana
+///
+/// Properties:
+/// * [count] 
+@BuiltValue()
+abstract class Banana implements Built<Banana, BananaBuilder> {
+  @BuiltValueField(wireName: r'count')
+  num? get count;
+
+  Banana._();
+
+  factory Banana([void updates(BananaBuilder b)]) = _$Banana;
+
+  @BuiltValueHook(initializeBuilder: true)
+  static void _defaults(BananaBuilder b) => b;
+
+  @BuiltValueSerializer(custom: true)
+  static Serializer<Banana> get serializer => _$BananaSerializer();
+}
+
+class _$BananaSerializer implements PrimitiveSerializer<Banana> {
+  @override
+  final Iterable<Type> types = const [Banana, _$Banana];
+
+  @override
+  final String wireName = r'Banana';
+
+  Iterable<Object?> _serializeProperties(
+    Serializers serializers,
+    Banana object, {
+    FullType specifiedType = FullType.unspecified,
+  }) sync* {
+    if (object.count != null) {
+      yield r'count';
+      yield serializers.serialize(
+        object.count,
+        specifiedType: const FullType(num),
+      );
+    }
+  }
+
+  @override
+  Object serialize(
+    Serializers serializers,
+    Banana object, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    return _serializeProperties(serializers, object, specifiedType: specifiedType).toList();
+  }
+
+  void _deserializeProperties(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+    required List<Object?> serializedList,
+    required BananaBuilder result,
+    required List<Object?> unhandled,
+  }) {
+    for (var i = 0; i < serializedList.length; i += 2) {
+      final key = serializedList[i] as String;
+      final value = serializedList[i + 1];
+      switch (key) {
+        case r'count':
+          final valueDes = serializers.deserialize(
+            value,
+            specifiedType: const FullType(num),
+          ) as num;
+          result.count = valueDes;
+          break;
+        default:
+          unhandled.add(key);
+          unhandled.add(value);
+          break;
+      }
+    }
+  }
+
+  @override
+  Banana deserialize(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    final result = BananaBuilder();
+    final serializedList = (serialized as Iterable<Object?>).toList();
+    final unhandled = <Object?>[];
+    _deserializeProperties(
+      serializers,
+      serialized,
+      specifiedType: specifiedType,
+      serializedList: serializedList,
+      unhandled: unhandled,
+      result: result,
+    );
+    return result.build();
+  }
+}
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/date.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/date.dart
new file mode 100644
index 000000000000..b21c7f544bee
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/date.dart
@@ -0,0 +1,70 @@
+/// A gregorian calendar date generated by
+/// OpenAPI generator to differentiate
+/// between [DateTime] and [Date] formats.
+class Date implements Comparable<Date> {
+  final int year;
+
+  /// January is 1.
+  final int month;
+
+  /// First day is 1.
+  final int day;
+
+  Date(this.year, this.month, this.day);
+
+  /// The current date
+  static Date now({bool utc = false}) {
+    var now = DateTime.now();
+    if (utc) {
+      now = now.toUtc();
+    }
+    return now.toDate();
+  }
+
+  /// Convert to a [DateTime].
+  DateTime toDateTime({bool utc = false}) {
+    if (utc) {
+      return DateTime.utc(year, month, day);
+    } else {
+      return DateTime(year, month, day);
+    }
+  }
+
+  @override
+  int compareTo(Date other) {
+    int d = year.compareTo(other.year);
+    if (d != 0) {
+      return d;
+    }
+    d = month.compareTo(other.month);
+    if (d != 0) {
+      return d;
+    }
+    return day.compareTo(other.day);
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Date &&
+          runtimeType == other.runtimeType &&
+          year == other.year &&
+          month == other.month &&
+          day == other.day;
+
+  @override
+  int get hashCode => year.hashCode ^ month.hashCode ^ day.hashCode;
+
+  @override
+  String toString() {
+    final yyyy = year.toString();
+    final mm = month.toString().padLeft(2, '0');
+    final dd = day.toString().padLeft(2, '0');
+
+    return '$yyyy-$mm-$dd';
+  }
+}
+
+extension DateTimeToDate on DateTime {
+  Date toDate() => Date(year, month, day);
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/fruit.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/fruit.dart
new file mode 100644
index 000000000000..958e5bec954e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/model/fruit.dart
@@ -0,0 +1,125 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+// ignore_for_file: unused_element
+import 'package:openapi/src/model/apple.dart';
+import 'package:openapi/src/model/banana.dart';
+import 'package:openapi/src/serializers_util.dart';
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+import 'package:one_of/any_of.dart';
+
+part 'fruit.g.dart';
+
+/// Fruit
+///
+/// Properties:
+/// * [color] 
+/// * [kind] 
+/// * [count] 
+@BuiltValue()
+abstract class Fruit implements Built<Fruit, FruitBuilder> {
+  @BuiltValueField(wireName: r'color')
+  String? get color;
+
+  /// Any Of [Apple], [Banana]
+  AnyOf2<Apple, Banana> get anyOf;
+
+  Fruit._();
+
+  factory Fruit([void updates(FruitBuilder b)]) = _$Fruit;
+
+  @BuiltValueHook(initializeBuilder: true)
+  static void _defaults(FruitBuilder b) => b;
+
+  @BuiltValueSerializer(custom: true)
+  static Serializer<Fruit> get serializer => _$FruitSerializer();
+}
+
+class _$FruitSerializer implements PrimitiveSerializer<Fruit> {
+  @override
+  final Iterable<Type> types = const [Fruit, _$Fruit];
+
+  @override
+  final String wireName = r'Fruit';
+
+  Iterable<Object?> _serializeProperties(
+    Serializers serializers,
+    Fruit object, {
+    FullType specifiedType = FullType.unspecified,
+  }) sync* {
+    if (object.color != null) {
+      yield r'color';
+      yield serializers.serialize(
+        object.color,
+        specifiedType: const FullType(String),
+      );
+    }
+  }
+
+  @override
+  Object serialize(
+    Serializers serializers,
+    Fruit object, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    final anyOf = object.anyOf;
+    final result = _serializeProperties(serializers, object, specifiedType: specifiedType).toList();
+    final serialized = serializers.serialize(anyOf, specifiedType: FullType(AnyOf, anyOf.valueTypes.map((type) => FullType(type)).toList()));
+    result.addAll((serialized is Map ? serialized.entries.map((e) => <dynamic>[e.key, e.value]).expand<dynamic>((e) => e) : serialized) as Iterable<Object?>);
+    return result;
+  }
+
+  void _deserializeProperties(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+    required List<Object?> serializedList,
+    required FruitBuilder result,
+    required List<Object?> unhandled,
+  }) {
+    for (var i = 0; i < serializedList.length; i += 2) {
+      final key = serializedList[i] as String;
+      final value = serializedList[i + 1];
+      switch (key) {
+        case r'color':
+          final valueDes = serializers.deserialize(
+            value,
+            specifiedType: const FullType(String),
+          ) as String;
+          result.color = valueDes;
+          break;
+        default:
+          unhandled.add(key);
+          unhandled.add(value);
+          break;
+      }
+    }
+  }
+
+  @override
+  Fruit deserialize(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    final result = FruitBuilder();
+    Object? anyOfDataSrc;
+    final targetType = const FullType(AnyOf, [FullType(Apple), FullType(Banana), ]);
+    final serializedList = (serialized as Iterable<Object?>).toList();
+    final unhandled = <Object?>[];
+    _deserializeProperties(
+      serializers,
+      serialized,
+      specifiedType: specifiedType,
+      serializedList: serializedList,
+      unhandled: unhandled,
+      result: result,
+    );
+    anyOfDataSrc = unhandled;
+    result.anyOf = anyOfFactory(serializers.deserialize(anyOfDataSrc, specifiedType: targetType) as AnyOfDynamic)<Apple, Banana>();
+    return result.build();
+  }
+}
+
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers.dart
new file mode 100644
index 000000000000..ddb1d66a1f5e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers.dart
@@ -0,0 +1,36 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+
+// ignore_for_file: unused_import
+
+import 'package:one_of_serializer/any_of_serializer.dart';
+import 'package:one_of_serializer/one_of_serializer.dart';
+import 'package:built_collection/built_collection.dart';
+import 'package:built_value/json_object.dart';
+import 'package:built_value/serializer.dart';
+import 'package:built_value/standard_json_plugin.dart';
+import 'package:built_value/iso_8601_date_time_serializer.dart';
+import 'package:openapi/src/date_serializer.dart';
+import 'package:openapi/src/model/date.dart';
+
+import 'package:openapi/src/model/apple.dart';
+import 'package:openapi/src/model/banana.dart';
+import 'package:openapi/src/model/fruit.dart';
+
+part 'serializers.g.dart';
+
+@SerializersFor([
+  Apple,
+  Banana,
+  Fruit,
+])
+Serializers serializers = (_$serializers.toBuilder()
+      ..add(const OneOfSerializer())
+      ..add(const AnyOfSerializer())
+      ..add(const DateSerializer())
+      ..add(Iso8601DateTimeSerializer()))
+    .build();
+
+Serializers standardSerializers =
+    (serializers.toBuilder()..addPlugin(StandardJsonPlugin())).build();
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers_util.dart b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers_util.dart
new file mode 100644
index 000000000000..3bcef4f32a0e
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/lib/src/serializers_util.dart
@@ -0,0 +1,74 @@
+import 'package:one_of/any_of.dart';
+import 'package:one_of/one_of.dart';
+
+Function oneOfFactory(OneOfDynamic oneOf) {
+  switch (oneOf.types.length) {
+    case 1:
+      return <T0>() => OneOf1<T0>(value: oneOf.value as T0);
+    case 2:
+      return <T0, T1>() => OneOf2<T0, T1>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 3:
+      return <T0, T1, T2>() => OneOf3<T0, T1, T2>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => OneOf4<T0, T1, T2, T3>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => OneOf5<T0, T1, T2, T3, T4>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => OneOf6<T0, T1, T2, T3, T4, T5>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          OneOf7<T0, T1, T2, T3, T4, T5, T6>(
+            value: oneOf.value,
+            typeIndex: oneOf.typeIndex,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${oneOf.types.length}');
+}
+
+Function anyOfFactory(AnyOfDynamic anyOf) {
+  switch (anyOf.types.length) {
+    case 1:
+      return <T0>() => AnyOf1<T0>(value: anyOf.values[0] as T0);
+    case 2:
+      return <T0, T1>() => AnyOf2<T0, T1>(
+            values: anyOf.values,
+          );
+    case 3:
+      return <T0, T1, T2>() => AnyOf3<T0, T1, T2>(
+            values: anyOf.values,
+          );
+    case 4:
+      return <T0, T1, T2, T3>() => AnyOf4<T0, T1, T2, T3>(
+            values: anyOf.values,
+          );
+    case 5:
+      return <T0, T1, T2, T3, T4>() => AnyOf5<T0, T1, T2, T3, T4>(
+            values: anyOf.values,
+          );
+    case 6:
+      return <T0, T1, T2, T3, T4, T5>() => AnyOf6<T0, T1, T2, T3, T4, T5>(
+            values: anyOf.values,
+          );
+    case 7:
+      return <T0, T1, T2, T3, T4, T5, T6>() =>
+          AnyOf7<T0, T1, T2, T3, T4, T5, T6>(
+            values: anyOf.values,
+          );
+  }
+  throw ArgumentError('Invalid number of types: ${anyOf.types.length}');
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/pubspec.yaml b/samples/openapi3/client/petstore/dart-dio/anyof/pubspec.yaml
new file mode 100644
index 000000000000..d4121509b909
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/pubspec.yaml
@@ -0,0 +1,20 @@
+name: openapi
+version: 1.0.0
+description: OpenAPI API client
+homepage: homepage
+
+
+environment:
+  sdk: '>=2.18.0 <4.0.0'
+
+dependencies:
+  dio: '^5.7.0'
+  one_of: '>=1.5.0 <2.0.0'
+  one_of_serializer: '>=1.5.0 <2.0.0'
+  built_value: '>=8.4.0 <9.0.0'
+  built_collection: '>=5.1.1 <6.0.0'
+
+dev_dependencies:
+  built_value_generator: '>=8.4.0 <9.0.0'
+  build_runner: any
+  test: '^1.16.0'
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/test/apple_test.dart b/samples/openapi3/client/petstore/dart-dio/anyof/test/apple_test.dart
new file mode 100644
index 000000000000..1d542169550d
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/test/apple_test.dart
@@ -0,0 +1,16 @@
+import 'package:test/test.dart';
+import 'package:openapi/openapi.dart';
+
+// tests for Apple
+void main() {
+  final instance = AppleBuilder();
+  // TODO add properties to the builder and call build()
+
+  group(Apple, () {
+    // String kind
+    test('to test the property `kind`', () async {
+      // TODO
+    });
+
+  });
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/test/banana_test.dart b/samples/openapi3/client/petstore/dart-dio/anyof/test/banana_test.dart
new file mode 100644
index 000000000000..a883acc0a9e8
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/test/banana_test.dart
@@ -0,0 +1,16 @@
+import 'package:test/test.dart';
+import 'package:openapi/openapi.dart';
+
+// tests for Banana
+void main() {
+  final instance = BananaBuilder();
+  // TODO add properties to the builder and call build()
+
+  group(Banana, () {
+    // num count
+    test('to test the property `count`', () async {
+      // TODO
+    });
+
+  });
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/test/default_api_test.dart b/samples/openapi3/client/petstore/dart-dio/anyof/test/default_api_test.dart
new file mode 100644
index 000000000000..07d256d2e554
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/test/default_api_test.dart
@@ -0,0 +1,16 @@
+import 'package:test/test.dart';
+import 'package:openapi/openapi.dart';
+
+
+/// tests for DefaultApi
+void main() {
+  final instance = Openapi().getDefaultApi();
+
+  group(DefaultApi, () {
+    //Future<Fruit> rootGet() async
+    test('test rootGet', () async {
+      // TODO
+    });
+
+  });
+}
diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/test/fruit_test.dart b/samples/openapi3/client/petstore/dart-dio/anyof/test/fruit_test.dart
new file mode 100644
index 000000000000..c18790ae9566
--- /dev/null
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/test/fruit_test.dart
@@ -0,0 +1,26 @@
+import 'package:test/test.dart';
+import 'package:openapi/openapi.dart';
+
+// tests for Fruit
+void main() {
+  final instance = FruitBuilder();
+  // TODO add properties to the builder and call build()
+
+  group(Fruit, () {
+    // String color
+    test('to test the property `color`', () async {
+      // TODO
+    });
+
+    // String kind
+    test('to test the property `kind`', () async {
+      // TODO
+    });
+
+    // num count
+    test('to test the property `count`', () async {
+      // TODO
+    });
+
+  });
+}

From e6f01b92eeefac2df3b9642abd8e69ce51d577f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Wed, 5 Mar 2025 05:45:35 +0900
Subject: [PATCH 7/8] [dart][dart-dio] update sample

---
 .../client/petstore/dart-dio/anyof/.openapi-generator/FILES  | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
index 67195a16eea9..cfdac167076b 100644
--- a/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
+++ b/samples/openapi3/client/petstore/dart-dio/anyof/.openapi-generator/FILES
@@ -1,5 +1,4 @@
 .gitignore
-.openapi-generator-ignore
 README.md
 analysis_options.yaml
 doc/Apple.md
@@ -23,7 +22,3 @@ lib/src/model/fruit.dart
 lib/src/serializers.dart
 lib/src/serializers_util.dart
 pubspec.yaml
-test/apple_test.dart
-test/banana_test.dart
-test/default_api_test.dart
-test/fruit_test.dart

From e8189d875372c2f2c43410e6f1ec04ce690b7955 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=B5=E3=81=81?= <yuki@yuki0311.com>
Date: Fri, 14 Mar 2025 02:34:42 +0900
Subject: [PATCH 8/8] [dart-dio] update dev dependencies in pubspec.yaml

---
 .../petstore_client_lib_fake_tests/pubspec.yaml      | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake_tests/pubspec.yaml b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake_tests/pubspec.yaml
index 5b4ebb1c5c09..ed6393164446 100644
--- a/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake_tests/pubspec.yaml
+++ b/samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake_tests/pubspec.yaml
@@ -8,11 +8,11 @@ environment:
   sdk: '>=2.15.0 <4.0.0'
 
 dev_dependencies:
-  built_collection: 5.1.1
-  built_value: 8.4.3
-  dio: 5.2.1
-  http_mock_adapter: 0.4.2
-  mockito: 5.2.0
+  built_collection: '>=5.1.1 <6.0.0'
+  built_value: '>=8.4.0 <9.0.0'
+  dio: '^5.7.0'
+  http_mock_adapter: ^0.4.2
+  mockito: ^5.2.0
   openapi:
     path: ../petstore_client_lib_fake
-  test: 1.21.0
+  test: '^1.16.0'