[kotlin-client] add support for kotlinx-datetime (#17166)

Closes #14490

.github/workflows/samples-kotlin-client.yaml

@@ -31,6 +31,7 @@ jobs:
           - samples/client/petstore/kotlin-jvm-volley
           - samples/client/petstore/kotlin-moshi-codegen
           - samples/client/petstore/kotlin-multiplatform
+          - samples/client/petstore/kotlin-multiplatform-kotlinx-datetime
           - samples/client/petstore/kotlin-nonpublic
           - samples/client/petstore/kotlin-nullable
           - samples/client/petstore/kotlin-okhttp3
@@ -39,6 +40,7 @@ jobs:
           - samples/client/petstore/kotlin-retrofit2-rx3
           - samples/client/petstore/kotlin-string
           - samples/client/petstore/kotlin-threetenbp
+          - samples/client/petstore/kotlin-kotlinx-datetime
           - samples/client/petstore/kotlin-uppercase-enum
           - samples/client/petstore/kotlin-default-values-jvm-okhttp3
           - samples/client/petstore/kotlin-default-values-jvm-okhttp4

bin/configs/kotlin-array-simple-string-multiplatform.yaml

@@ -5,3 +5,4 @@ templateDir: modules/openapi-generator/src/main/resources/kotlin-client
 additionalProperties:
   artifactId: kotlin-array-simple-string-multiplatform
   library: multiplatform
+  dateLibrary: kotlinx-datetime

bin/configs/kotlin-bigdecimal-default-multiplatform.yaml

@@ -5,3 +5,4 @@ templateDir: modules/openapi-generator/src/main/resources/kotlin-client
 additionalProperties:
   artifactId: kotlin-bigdecimal-default-multiplatform
   library: multiplatform
+  dateLibrary: kotlinx-datetime

bin/configs/kotlin-default-values-multiplatform.yaml

@@ -5,4 +5,5 @@ templateDir: modules/openapi-generator/src/main/resources/kotlin-client
 additionalProperties:
   artifactId: kotlin-default-values-multiplatform
   library: multiplatform
+  dateLibrary: kotlinx-datetime
   sortParamsByRequiredFlag: false

bin/configs/kotlin-kotlinx-datetime.yaml

@@ -0,0 +1,7 @@
+generatorName: kotlin
+outputDir: samples/client/petstore/kotlin-kotlinx-datetime
+inputSpec: modules/openapi-generator/src/test/resources/2_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/kotlin-client
+additionalProperties:
+  artifactId: kotlin-petstore-threetenbp
+  dateLibrary: kotlinx-datetime

bin/configs/kotlin-multiplatform-kotlinx-datetime.yaml

@@ -0,0 +1,8 @@
+generatorName: kotlin
+outputDir: samples/client/petstore/kotlin-multiplatform-kotlinx-datetime
+library: multiplatform
+dateLibrary: kotlinx-datetime
+inputSpec: modules/openapi-generator/src/test/resources/2_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/kotlin-client
+additionalProperties:
+  artifactId: kotlin-client-petstore-multiplatform-kotlinx-datetime

bin/configs/kotlin-multiplatform.yaml

@@ -1,6 +1,7 @@
 generatorName: kotlin
 outputDir: samples/client/petstore/kotlin-multiplatform
 library: multiplatform
+dateLibrary: kotlinx-datetime
 inputSpec: modules/openapi-generator/src/test/resources/2_0/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/kotlin-client
 additionalProperties:

docs/generators/kotlin.md

@@ -23,7 +23,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |artifactId|Generated artifact id (name of jar).| |kotlin-client|
 |artifactVersion|Generated artifact's package version.| |1.0.0|
 |collectionType|Option. Collection type to use|<dl><dt>**array**</dt><dd>kotlin.Array</dd><dt>**list**</dt><dd>kotlin.collections.List</dd></dl>|list|
-|dateLibrary|Option. Date library to use|<dl><dt>**threetenbp-localdatetime**</dt><dd>Threetenbp - Backport of JSR310 (jvm only, for legacy app only)</dd><dt>**string**</dt><dd>String</dd><dt>**java8-localdatetime**</dt><dd>Java 8 native JSR310 (jvm only, for legacy app only)</dd><dt>**java8**</dt><dd>Java 8 native JSR310 (jvm only, preferred for jdk 1.8+)</dd><dt>**threetenbp**</dt><dd>Threetenbp - Backport of JSR310 (jvm only, preferred for jdk &lt; 1.8)</dd></dl>|java8|
+|dateLibrary|Option. Date library to use|<dl><dt>**threetenbp-localdatetime**</dt><dd>Threetenbp - Backport of JSR310 (jvm only, for legacy app only)</dd><dt>**kotlinx-datetime**</dt><dd>kotlinx-datetime (preferred for multiplatform)</dd><dt>**string**</dt><dd>String</dd><dt>**java8-localdatetime**</dt><dd>Java 8 native JSR310 (jvm only, for legacy app only)</dd><dt>**java8**</dt><dd>Java 8 native JSR310 (jvm only, preferred for jdk 1.8+)</dd><dt>**threetenbp**</dt><dd>Threetenbp - Backport of JSR310 (jvm only, preferred for jdk &lt; 1.8)</dd></dl>|java8|
 |enumPropertyNaming|Naming convention for enum properties: 'camelCase', 'PascalCase', 'snake_case', 'UPPERCASE', and 'original'| |camelCase|
 |generateRoomModels|Generate Android Room database models in addition to API models (JVM Volley library only)| |false|
 |groupId|Generated artifact package's organization (i.e. maven groupId).| |org.openapitools|

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

@@ -113,7 +113,8 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
         THREETENBP("threetenbp"),
         THREETENBP_LOCALDATETIME("threetenbp-localdatetime"),
         JAVA8("java8"),
-        JAVA8_LOCALDATETIME("java8-localdatetime");
+        JAVA8_LOCALDATETIME("java8-localdatetime"),
+        KOTLINX_DATETIME("kotlinx-datetime");
 
         public final String value;
 
@@ -203,6 +204,7 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
         dateOptions.put(DateLibrary.STRING.value, "String");
         dateOptions.put(DateLibrary.JAVA8.value, "Java 8 native JSR310 (jvm only, preferred for jdk 1.8+)");
         dateOptions.put(DateLibrary.JAVA8_LOCALDATETIME.value, "Java 8 native JSR310 (jvm only, for legacy app only)");
+        dateOptions.put(DateLibrary.KOTLINX_DATETIME.value, "kotlinx-datetime (preferred for multiplatform)");
         dateLibrary.setEnum(dateOptions);
         dateLibrary.setDefault(this.dateLibrary);
         cliOptions.add(dateLibrary);
@@ -515,6 +517,8 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
             processStringDate();
         } else if (DateLibrary.JAVA8.value.equals(dateLibrary) || DateLibrary.JAVA8_LOCALDATETIME.value.equals(dateLibrary)) {
             processJava8Date(dateLibrary);
+        } else if (DateLibrary.KOTLINX_DATETIME.value.equals(dateLibrary)) {
+            processKotlinxDate();
         }
     }
 
@@ -566,6 +570,14 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
         }
     }
 
+    private void processKotlinxDate() {
+        additionalProperties.put(DateLibrary.KOTLINX_DATETIME.value, true);
+
+        typeMapping.put("date-time", "kotlinx.datetime.Instant");
+        typeMapping.put("DateTime", "Instant");
+        importMapping.put("Instant", "kotlinx.datetime.Instant");
+    }
+
     private void processJVMRetrofit2Library(String infrastructureFolder) {
         additionalProperties.put(JVM, true);
         additionalProperties.put(JVM_RETROFIT2, true);
@@ -629,6 +641,7 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/LocalDateAdapter.kt.mustache", infrastructureFolder, "LocalDateAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/LocalDateTimeAdapter.kt.mustache", infrastructureFolder, "LocalDateTimeAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/OffsetDateTimeAdapter.kt.mustache", infrastructureFolder, "OffsetDateTimeAdapter.kt"));
+                addKotlinxDateTimeInstantAdapter(infrastructureFolder);
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/BigDecimalAdapter.kt.mustache", infrastructureFolder, "BigDecimalAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/BigIntegerAdapter.kt.mustache", infrastructureFolder, "BigIntegerAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/URIAdapter.kt.mustache", infrastructureFolder, "URIAdapter.kt"));
@@ -639,6 +652,7 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/LocalDateAdapter.kt.mustache", infrastructureFolder, "LocalDateAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/LocalDateTimeAdapter.kt.mustache", infrastructureFolder, "LocalDateTimeAdapter.kt"));
                 supportingFiles.add(new SupportingFile("jvm-common/infrastructure/OffsetDateTimeAdapter.kt.mustache", infrastructureFolder, "OffsetDateTimeAdapter.kt"));
+                addKotlinxDateTimeInstantAdapter(infrastructureFolder);
                 break;
 
             case jackson:
@@ -662,6 +676,12 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
         }
     }
 
+    private void addKotlinxDateTimeInstantAdapter(final String infrastructureFolder) {
+        if (DateLibrary.KOTLINX_DATETIME.value.equals(dateLibrary)) {
+            supportingFiles.add(new SupportingFile("jvm-common/infrastructure/InstantAdapter.kt.mustache", infrastructureFolder, "InstantAdapter.kt"));
+        }
+    }
+
     private void processJVMKtorLibrary(final String infrastructureFolder) {
         // in future kotlinx.serialization may be added
         if (this.serializationLibrary != SERIALIZATION_LIBRARY_TYPE.gson && this.serializationLibrary != SERIALIZATION_LIBRARY_TYPE.jackson) {
@@ -741,7 +761,11 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
     private void processMultiplatformLibrary(final String infrastructureFolder) {
         commonJvmMultiplatformSupportingFiles(infrastructureFolder);
         additionalProperties.put(MULTIPLATFORM, true);
-        setDateLibrary(DateLibrary.STRING.value);
+
+        if (!DateLibrary.STRING.value.equals(dateLibrary) && !DateLibrary.KOTLINX_DATETIME.value.equals(dateLibrary)) {
+            throw new RuntimeException("Multiplatform only supports string and kotlinx-datetime. Try adding '--additional-properties dateLibrary=kotlinx-datetime' to your command.");
+        }
+
         setRequestDateConverter(RequestDateConverter.TO_STRING.value);
 
         // multiplatform default includes

modules/openapi-generator/src/main/resources/kotlin-client/build.gradle.mustache

@@ -168,6 +168,9 @@ dependencies {
     {{#threetenbp}}
     implementation "org.threeten:threetenbp:1.6.8"
     {{/threetenbp}}
+    {{#kotlinx-datetime}}
+    implementation "org.jetbrains.kotlinx:kotlinx-datetime:0.4.0"
+    {{/kotlinx-datetime}}
     {{#jvm-retrofit2}}
     {{#hasOAuthMethods}}
     implementation "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:1.0.2"

modules/openapi-generator/src/main/resources/kotlin-client/jvm-common/infrastructure/InstantAdapter.kt.mustache

@@ -0,0 +1,56 @@
+package {{packageName}}.infrastructure
+
+{{#moshi}}
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+{{/moshi}}
+{{#gson}}
+import com.google.gson.TypeAdapter
+import com.google.gson.stream.JsonReader
+import com.google.gson.stream.JsonWriter
+import com.google.gson.stream.JsonToken.NULL
+import java.io.IOException
+{{/gson}}
+import kotlinx.datetime.Instant
+
+{{#moshi}}
+{{#nonPublicApi}}internal {{/nonPublicApi}}class InstantAdapter {
+    @ToJson
+    fun toJson(value: Instant): String {
+        return value.toString()
+    }
+
+    @FromJson
+    fun fromJson(value: String): Instant {
+        return Instant.parse(value)
+    }
+
+}
+{{/moshi}}
+{{#gson}}
+{{#nonPublicApi}}internal {{/nonPublicApi}}class InstantAdapter : TypeAdapter<Instant>() {
+    @Throws(IOException::class)
+    override fun write(out: JsonWriter?, value: Instant?) {
+        if (value == null) {
+            out?.nullValue()
+        } else {
+            out?.value(value.toString())
+        }
+    }
+
+    @Throws(IOException::class)
+    override fun read(out: JsonReader?): Instant? {
+        out ?: return null
+
+        when (out.peek()) {
+            NULL -> {
+                out.nextNull()
+                return null
+            }
+            else -> {
+                return Instant.parse(out.nextString())
+            }
+        }
+    }
+}
+{{/gson}}

modules/openapi-generator/src/main/resources/kotlin-client/jvm-common/infrastructure/Serializer.kt.mustache

@@ -22,6 +22,9 @@ import org.threeten.bp.LocalDate
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.OffsetDateTime
 {{/threetenbp}}
+{{#kotlinx-datetime}}
+import kotlinx.datetime.Instant
+{{/kotlinx-datetime}}
 import java.util.UUID
 {{/gson}}
 {{#jackson}}
@@ -58,6 +61,9 @@ import java.util.concurrent.atomic.AtomicLong
     @JvmStatic
     val moshiBuilder: Moshi.Builder = Moshi.Builder()
         .add(OffsetDateTimeAdapter())
+        {{#kotlinx-datetime}}
+        .add(InstantAdapter())
+        {{/kotlinx-datetime}}
         .add(LocalDateTimeAdapter())
         .add(LocalDateAdapter())
         .add(UUIDAdapter())
@@ -81,6 +87,9 @@ import java.util.concurrent.atomic.AtomicLong
     @JvmStatic
     val gsonBuilder: GsonBuilder = GsonBuilder()
         .registerTypeAdapter(OffsetDateTime::class.java, OffsetDateTimeAdapter())
+        {{#kotlinx-datetime}}
+        .registerTypeAdapter(Instant::class.java, InstantAdapter())
+        {{/kotlinx-datetime}}
         .registerTypeAdapter(LocalDateTime::class.java, LocalDateTimeAdapter())
         .registerTypeAdapter(LocalDate::class.java, LocalDateAdapter())
         .registerTypeAdapter(ByteArray::class.java, ByteArrayAdapter())

modules/openapi-generator/src/main/resources/kotlin-client/libraries/multiplatform/build.gradle.kts.mustache

@@ -36,6 +36,10 @@ kotlin {
                 api("io.ktor:ktor-client-serialization:$ktor_version")
                 api("io.ktor:ktor-client-content-negotiation:$ktor_version")
                 api("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")
+
+                {{#kotlinx-datetime}}
+                api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
+                {{/kotlinx-datetime}}
             }
         }
 

samples/client/petstore/kotlin-array-simple-string-multiplatform/build.gradle.kts

@@ -36,6 +36,8 @@ kotlin {
                 api("io.ktor:ktor-client-serialization:$ktor_version")
                 api("io.ktor:ktor-client-content-negotiation:$ktor_version")
                 api("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")
+
+                api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
             }
         }
 

samples/client/petstore/kotlin-bigdecimal-default-multiplatform/build.gradle.kts

@@ -36,6 +36,8 @@ kotlin {
                 api("io.ktor:ktor-client-serialization:$ktor_version")
                 api("io.ktor:ktor-client-content-negotiation:$ktor_version")
                 api("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")
+
+                api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
             }
         }
 

samples/client/petstore/kotlin-default-values-multiplatform/build.gradle.kts

@@ -36,6 +36,8 @@ kotlin {
                 api("io.ktor:ktor-client-serialization:$ktor_version")
                 api("io.ktor:ktor-client-content-negotiation:$ktor_version")
                 api("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")
+
+                api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
             }
         }
 

samples/client/petstore/kotlin-kotlinx-datetime/.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

samples/client/petstore/kotlin-kotlinx-datetime/.openapi-generator/FILES

@@ -0,0 +1,43 @@
+README.md
+build.gradle
+docs/ApiResponse.md
+docs/Category.md
+docs/Order.md
+docs/Pet.md
+docs/PetApi.md
+docs/StoreApi.md
+docs/Tag.md
+docs/User.md
+docs/UserApi.md
+gradle/wrapper/gradle-wrapper.jar
+gradle/wrapper/gradle-wrapper.properties
+gradlew
+gradlew.bat
+settings.gradle
+src/main/kotlin/org/openapitools/client/apis/PetApi.kt
+src/main/kotlin/org/openapitools/client/apis/StoreApi.kt
+src/main/kotlin/org/openapitools/client/apis/UserApi.kt
+src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+src/main/kotlin/org/openapitools/client/infrastructure/ApiResponse.kt
+src/main/kotlin/org/openapitools/client/infrastructure/BigDecimalAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/BigIntegerAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/ByteArrayAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/Errors.kt
+src/main/kotlin/org/openapitools/client/infrastructure/InstantAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/LocalDateAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/LocalDateTimeAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/OffsetDateTimeAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/PartConfig.kt
+src/main/kotlin/org/openapitools/client/infrastructure/RequestConfig.kt
+src/main/kotlin/org/openapitools/client/infrastructure/RequestMethod.kt
+src/main/kotlin/org/openapitools/client/infrastructure/ResponseExtensions.kt
+src/main/kotlin/org/openapitools/client/infrastructure/Serializer.kt
+src/main/kotlin/org/openapitools/client/infrastructure/URIAdapter.kt
+src/main/kotlin/org/openapitools/client/infrastructure/UUIDAdapter.kt
+src/main/kotlin/org/openapitools/client/models/Category.kt
+src/main/kotlin/org/openapitools/client/models/ModelApiResponse.kt
+src/main/kotlin/org/openapitools/client/models/Order.kt
+src/main/kotlin/org/openapitools/client/models/Pet.kt
+src/main/kotlin/org/openapitools/client/models/Tag.kt
+src/main/kotlin/org/openapitools/client/models/User.kt

samples/client/petstore/kotlin-kotlinx-datetime/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.2.0-SNAPSHOT

samples/client/petstore/kotlin-kotlinx-datetime/README.md

@@ -0,0 +1,101 @@
+# org.openapitools.client - Kotlin client library for OpenAPI Petstore
+
+This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+
+## Overview
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [openapi-spec](https://github.com/OAI/OpenAPI-Specification) from a remote server, you can easily generate an API client.
+
+- API version: 1.0.0
+- Package version: 
+- Build package: org.openapitools.codegen.languages.KotlinClientCodegen
+
+## Requires
+
+* Kotlin 1.7.21
+* Gradle 7.5
+
+## Build
+
+First, create the gradle wrapper script:
+
+```
+gradle wrapper
+```
+
+Then, run:
+
+```
+./gradlew check assemble
+```
+
+This runs all tests and packages the library.
+
+## Features/Implementation Notes
+
+* Supports JSON inputs/outputs, File inputs, and Form inputs.
+* Supports collection formats for query parameters: csv, tsv, ssv, pipes.
+* Some Kotlin and Java types are fully qualified to avoid conflicts with types defined in OpenAPI definitions.
+* Implementation of ApiClient is intended to reduce method counts, specifically to benefit Android targets.
+
+<a id="documentation-for-api-endpoints"></a>
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*PetApi* | [**addPet**](docs/PetApi.md#addpet) | **POST** /pet | Add a new pet to the store
+*PetApi* | [**deletePet**](docs/PetApi.md#deletepet) | **DELETE** /pet/{petId} | Deletes a pet
+*PetApi* | [**findPetsByStatus**](docs/PetApi.md#findpetsbystatus) | **GET** /pet/findByStatus | Finds Pets by status
+*PetApi* | [**findPetsByTags**](docs/PetApi.md#findpetsbytags) | **GET** /pet/findByTags | Finds Pets by tags
+*PetApi* | [**getPetById**](docs/PetApi.md#getpetbyid) | **GET** /pet/{petId} | Find pet by ID
+*PetApi* | [**updatePet**](docs/PetApi.md#updatepet) | **PUT** /pet | Update an existing pet
+*PetApi* | [**updatePetWithForm**](docs/PetApi.md#updatepetwithform) | **POST** /pet/{petId} | Updates a pet in the store with form data
+*PetApi* | [**uploadFile**](docs/PetApi.md#uploadfile) | **POST** /pet/{petId}/uploadImage | uploads an image
+*StoreApi* | [**deleteOrder**](docs/StoreApi.md#deleteorder) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+*StoreApi* | [**getInventory**](docs/StoreApi.md#getinventory) | **GET** /store/inventory | Returns pet inventories by status
+*StoreApi* | [**getOrderById**](docs/StoreApi.md#getorderbyid) | **GET** /store/order/{orderId} | Find purchase order by ID
+*StoreApi* | [**placeOrder**](docs/StoreApi.md#placeorder) | **POST** /store/order | Place an order for a pet
+*UserApi* | [**createUser**](docs/UserApi.md#createuser) | **POST** /user | Create user
+*UserApi* | [**createUsersWithArrayInput**](docs/UserApi.md#createuserswitharrayinput) | **POST** /user/createWithArray | Creates list of users with given input array
+*UserApi* | [**createUsersWithListInput**](docs/UserApi.md#createuserswithlistinput) | **POST** /user/createWithList | Creates list of users with given input array
+*UserApi* | [**deleteUser**](docs/UserApi.md#deleteuser) | **DELETE** /user/{username} | Delete user
+*UserApi* | [**getUserByName**](docs/UserApi.md#getuserbyname) | **GET** /user/{username} | Get user by user name
+*UserApi* | [**loginUser**](docs/UserApi.md#loginuser) | **GET** /user/login | Logs user into the system
+*UserApi* | [**logoutUser**](docs/UserApi.md#logoutuser) | **GET** /user/logout | Logs out current logged in user session
+*UserApi* | [**updateUser**](docs/UserApi.md#updateuser) | **PUT** /user/{username} | Updated user
+
+
+<a id="documentation-for-models"></a>
+## Documentation for Models
+
+ - [org.openapitools.client.models.Category](docs/Category.md)
+ - [org.openapitools.client.models.ModelApiResponse](docs/ModelApiResponse.md)
+ - [org.openapitools.client.models.Order](docs/Order.md)
+ - [org.openapitools.client.models.Pet](docs/Pet.md)
+ - [org.openapitools.client.models.Tag](docs/Tag.md)
+ - [org.openapitools.client.models.User](docs/User.md)
+
+
+<a id="documentation-for-authorization"></a>
+## Documentation for Authorization
+
+
+Authentication schemes defined for the API:
+<a id="petstore_auth"></a>
+### petstore_auth
+
+- **Type**: OAuth
+- **Flow**: implicit
+- **Authorization URL**: http://petstore.swagger.io/api/oauth/dialog
+- **Scopes**: 
+  - write:pets: modify pets in your account
+  - read:pets: read your pets
+
+<a id="api_key"></a>
+### api_key
+
+- **Type**: API key
+- **API key parameter name**: api_key
+- **Location**: HTTP header
+

samples/client/petstore/kotlin-kotlinx-datetime/build.gradle

@@ -0,0 +1,63 @@
+group 'org.openapitools'
+version '1.0.0'
+
+wrapper {
+    gradleVersion = '7.5'
+    distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
+}
+
+buildscript {
+    ext.kotlin_version = '1.8.10'
+    ext.spotless_version = "6.13.0"
+
+    repositories {
+        maven { url "https://repo1.maven.org/maven2" }
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "com.diffplug.spotless:spotless-plugin-gradle:$spotless_version"
+    }
+}
+
+apply plugin: 'kotlin'
+apply plugin: 'maven-publish'
+apply plugin: 'com.diffplug.spotless'
+
+repositories {
+    maven { url "https://repo1.maven.org/maven2" }
+}
+
+// Use spotless plugin to automatically format code, remove unused import, etc
+// To apply changes directly to the file, run `gradlew spotlessApply`
+// Ref: https://github.com/diffplug/spotless/tree/main/plugin-gradle
+spotless {
+    // comment out below to run spotless as part of the `check` task
+    enforceCheck false
+
+    format 'misc', {
+        // define the files (e.g. '*.gradle', '*.md') to apply `misc` to
+        target '.gitignore'
+
+        // define the steps to apply to those files
+        trimTrailingWhitespace()
+        indentWithSpaces() // Takes an integer argument if you don't like 4
+        endWithNewline()
+    }
+    kotlin {
+        ktfmt()
+    }
+}
+
+test {
+    useJUnitPlatform()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
+    implementation "com.squareup.moshi:moshi-kotlin:1.14.0"
+    implementation "com.squareup.moshi:moshi-adapters:1.14.0"
+    implementation "com.squareup.okhttp3:okhttp:4.11.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-datetime:0.4.0"
+    testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
+}

samples/client/petstore/kotlin-kotlinx-datetime/docs/ApiResponse.md

@@ -0,0 +1,12 @@
+
+# ModelApiResponse
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**code** | **kotlin.Int** |  |  [optional]
+**type** | **kotlin.String** |  |  [optional]
+**message** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/Category.md

@@ -0,0 +1,11 @@
+
+# Category
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**name** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/Order.md

@@ -0,0 +1,22 @@
+
+# Order
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**petId** | **kotlin.Long** |  |  [optional]
+**quantity** | **kotlin.Int** |  |  [optional]
+**shipDate** | [**kotlinx.datetime.Instant**](kotlinx.datetime.Instant.md) |  |  [optional]
+**status** | [**inline**](#Status) | Order Status |  [optional]
+**complete** | **kotlin.Boolean** |  |  [optional]
+
+
+<a id="Status"></a>
+## Enum: status
+Name | Value
+---- | -----
+status | placed, approved, delivered
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/Pet.md

@@ -0,0 +1,22 @@
+
+# Pet
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**name** | **kotlin.String** |  | 
+**photoUrls** | **kotlin.collections.List<kotlin.String>** |  | 
+**id** | **kotlin.Long** |  |  [optional]
+**category** | [**Category**](Category.md) |  |  [optional]
+**tags** | [**kotlin.collections.List<Tag>**](Tag.md) |  |  [optional]
+**status** | [**inline**](#Status) | pet status in the store |  [optional]
+
+
+<a id="Status"></a>
+## Enum: status
+Name | Value
+---- | -----
+status | available, pending, sold
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/PetApi.md

@@ -0,0 +1,405 @@
+# PetApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**addPet**](PetApi.md#addPet) | **POST** /pet | Add a new pet to the store
+[**deletePet**](PetApi.md#deletePet) | **DELETE** /pet/{petId} | Deletes a pet
+[**findPetsByStatus**](PetApi.md#findPetsByStatus) | **GET** /pet/findByStatus | Finds Pets by status
+[**findPetsByTags**](PetApi.md#findPetsByTags) | **GET** /pet/findByTags | Finds Pets by tags
+[**getPetById**](PetApi.md#getPetById) | **GET** /pet/{petId} | Find pet by ID
+[**updatePet**](PetApi.md#updatePet) | **PUT** /pet | Update an existing pet
+[**updatePetWithForm**](PetApi.md#updatePetWithForm) | **POST** /pet/{petId} | Updates a pet in the store with form data
+[**uploadFile**](PetApi.md#uploadFile) | **POST** /pet/{petId}/uploadImage | uploads an image
+
+
+<a id="addPet"></a>
+# **addPet**
+> addPet(body)
+
+Add a new pet to the store
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val body : Pet =  // Pet | Pet object that needs to be added to the store
+try {
+    apiInstance.addPet(body)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#addPet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#addPet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: Not defined
+
+<a id="deletePet"></a>
+# **deletePet**
+> deletePet(petId, apiKey)
+
+Deletes a pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | Pet id to delete
+val apiKey : kotlin.String = apiKey_example // kotlin.String | 
+try {
+    apiInstance.deletePet(petId, apiKey)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#deletePet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#deletePet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| Pet id to delete |
+ **apiKey** | **kotlin.String**|  | [optional]
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="findPetsByStatus"></a>
+# **findPetsByStatus**
+> kotlin.collections.List&lt;Pet&gt; findPetsByStatus(status)
+
+Finds Pets by status
+
+Multiple status values can be provided with comma separated strings
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val status : kotlin.collections.List<kotlin.String> =  // kotlin.collections.List<kotlin.String> | Status values that need to be considered for filter
+try {
+    val result : kotlin.collections.List<Pet> = apiInstance.findPetsByStatus(status)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#findPetsByStatus")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#findPetsByStatus")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **status** | [**kotlin.collections.List&lt;kotlin.String&gt;**](kotlin.String.md)| Status values that need to be considered for filter | [enum: available, pending, sold]
+
+### Return type
+
+[**kotlin.collections.List&lt;Pet&gt;**](Pet.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="findPetsByTags"></a>
+# **findPetsByTags**
+> kotlin.collections.List&lt;Pet&gt; findPetsByTags(tags)
+
+Finds Pets by tags
+
+Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val tags : kotlin.collections.List<kotlin.String> =  // kotlin.collections.List<kotlin.String> | Tags to filter by
+try {
+    val result : kotlin.collections.List<Pet> = apiInstance.findPetsByTags(tags)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#findPetsByTags")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#findPetsByTags")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **tags** | [**kotlin.collections.List&lt;kotlin.String&gt;**](kotlin.String.md)| Tags to filter by |
+
+### Return type
+
+[**kotlin.collections.List&lt;Pet&gt;**](Pet.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="getPetById"></a>
+# **getPetById**
+> Pet getPetById(petId)
+
+Find pet by ID
+
+Returns a single pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet to return
+try {
+    val result : Pet = apiInstance.getPetById(petId)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#getPetById")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#getPetById")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet to return |
+
+### Return type
+
+[**Pet**](Pet.md)
+
+### Authorization
+
+
+Configure api_key:
+    ApiClient.apiKey["api_key"] = ""
+    ApiClient.apiKeyPrefix["api_key"] = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="updatePet"></a>
+# **updatePet**
+> updatePet(body)
+
+Update an existing pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val body : Pet =  // Pet | Pet object that needs to be added to the store
+try {
+    apiInstance.updatePet(body)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#updatePet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#updatePet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: Not defined
+
+<a id="updatePetWithForm"></a>
+# **updatePetWithForm**
+> updatePetWithForm(petId, name, status)
+
+Updates a pet in the store with form data
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet that needs to be updated
+val name : kotlin.String = name_example // kotlin.String | Updated name of the pet
+val status : kotlin.String = status_example // kotlin.String | Updated status of the pet
+try {
+    apiInstance.updatePetWithForm(petId, name, status)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#updatePetWithForm")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#updatePetWithForm")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet that needs to be updated |
+ **name** | **kotlin.String**| Updated name of the pet | [optional]
+ **status** | **kotlin.String**| Updated status of the pet | [optional]
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/x-www-form-urlencoded
+ - **Accept**: Not defined
+
+<a id="uploadFile"></a>
+# **uploadFile**
+> ModelApiResponse uploadFile(petId, additionalMetadata, file)
+
+uploads an image
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet to update
+val additionalMetadata : kotlin.String = additionalMetadata_example // kotlin.String | Additional data to pass to server
+val file : java.io.File = BINARY_DATA_HERE // java.io.File | file to upload
+try {
+    val result : ModelApiResponse = apiInstance.uploadFile(petId, additionalMetadata, file)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#uploadFile")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#uploadFile")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet to update |
+ **additionalMetadata** | **kotlin.String**| Additional data to pass to server | [optional]
+ **file** | **java.io.File**| file to upload | [optional]
+
+### Return type
+
+[**ModelApiResponse**](ModelApiResponse.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: multipart/form-data
+ - **Accept**: application/json
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/StoreApi.md

@@ -0,0 +1,196 @@
+# StoreApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**deleteOrder**](StoreApi.md#deleteOrder) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+[**getInventory**](StoreApi.md#getInventory) | **GET** /store/inventory | Returns pet inventories by status
+[**getOrderById**](StoreApi.md#getOrderById) | **GET** /store/order/{orderId} | Find purchase order by ID
+[**placeOrder**](StoreApi.md#placeOrder) | **POST** /store/order | Place an order for a pet
+
+
+<a id="deleteOrder"></a>
+# **deleteOrder**
+> deleteOrder(orderId)
+
+Delete purchase order by ID
+
+For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val orderId : kotlin.String = orderId_example // kotlin.String | ID of the order that needs to be deleted
+try {
+    apiInstance.deleteOrder(orderId)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#deleteOrder")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#deleteOrder")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **orderId** | **kotlin.String**| ID of the order that needs to be deleted |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="getInventory"></a>
+# **getInventory**
+> kotlin.collections.Map&lt;kotlin.String, kotlin.Int&gt; getInventory()
+
+Returns pet inventories by status
+
+Returns a map of status codes to quantities
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+try {
+    val result : kotlin.collections.Map<kotlin.String, kotlin.Int> = apiInstance.getInventory()
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#getInventory")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#getInventory")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+**kotlin.collections.Map&lt;kotlin.String, kotlin.Int&gt;**
+
+### Authorization
+
+
+Configure api_key:
+    ApiClient.apiKey["api_key"] = ""
+    ApiClient.apiKeyPrefix["api_key"] = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="getOrderById"></a>
+# **getOrderById**
+> Order getOrderById(orderId)
+
+Find purchase order by ID
+
+For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val orderId : kotlin.Long = 789 // kotlin.Long | ID of pet that needs to be fetched
+try {
+    val result : Order = apiInstance.getOrderById(orderId)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#getOrderById")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#getOrderById")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **orderId** | **kotlin.Long**| ID of pet that needs to be fetched |
+
+### Return type
+
+[**Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="placeOrder"></a>
+# **placeOrder**
+> Order placeOrder(body)
+
+Place an order for a pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val body : Order =  // Order | order placed for purchasing the pet
+try {
+    val result : Order = apiInstance.placeOrder(body)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#placeOrder")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#placeOrder")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Order**](Order.md)| order placed for purchasing the pet |
+
+### Return type
+
+[**Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/Tag.md

@@ -0,0 +1,11 @@
+
+# Tag
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**name** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/User.md

@@ -0,0 +1,17 @@
+
+# User
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**username** | **kotlin.String** |  |  [optional]
+**firstName** | **kotlin.String** |  |  [optional]
+**lastName** | **kotlin.String** |  |  [optional]
+**email** | **kotlin.String** |  |  [optional]
+**password** | **kotlin.String** |  |  [optional]
+**phone** | **kotlin.String** |  |  [optional]
+**userStatus** | **kotlin.Int** | User Status |  [optional]
+
+
+

samples/client/petstore/kotlin-kotlinx-datetime/docs/UserApi.md

@@ -0,0 +1,376 @@
+# UserApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**createUser**](UserApi.md#createUser) | **POST** /user | Create user
+[**createUsersWithArrayInput**](UserApi.md#createUsersWithArrayInput) | **POST** /user/createWithArray | Creates list of users with given input array
+[**createUsersWithListInput**](UserApi.md#createUsersWithListInput) | **POST** /user/createWithList | Creates list of users with given input array
+[**deleteUser**](UserApi.md#deleteUser) | **DELETE** /user/{username} | Delete user
+[**getUserByName**](UserApi.md#getUserByName) | **GET** /user/{username} | Get user by user name
+[**loginUser**](UserApi.md#loginUser) | **GET** /user/login | Logs user into the system
+[**logoutUser**](UserApi.md#logoutUser) | **GET** /user/logout | Logs out current logged in user session
+[**updateUser**](UserApi.md#updateUser) | **PUT** /user/{username} | Updated user
+
+
+<a id="createUser"></a>
+# **createUser**
+> createUser(body)
+
+Create user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : User =  // User | Created user object
+try {
+    apiInstance.createUser(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**User**](User.md)| Created user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="createUsersWithArrayInput"></a>
+# **createUsersWithArrayInput**
+> createUsersWithArrayInput(body)
+
+Creates list of users with given input array
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : kotlin.collections.List<User> =  // kotlin.collections.List<User> | List of user object
+try {
+    apiInstance.createUsersWithArrayInput(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUsersWithArrayInput")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUsersWithArrayInput")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**kotlin.collections.List&lt;User&gt;**](User.md)| List of user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="createUsersWithListInput"></a>
+# **createUsersWithListInput**
+> createUsersWithListInput(body)
+
+Creates list of users with given input array
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : kotlin.collections.List<User> =  // kotlin.collections.List<User> | List of user object
+try {
+    apiInstance.createUsersWithListInput(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUsersWithListInput")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUsersWithListInput")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**kotlin.collections.List&lt;User&gt;**](User.md)| List of user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="deleteUser"></a>
+# **deleteUser**
+> deleteUser(username)
+
+Delete user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The name that needs to be deleted
+try {
+    apiInstance.deleteUser(username)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#deleteUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#deleteUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The name that needs to be deleted |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="getUserByName"></a>
+# **getUserByName**
+> User getUserByName(username)
+
+Get user by user name
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The name that needs to be fetched. Use user1 for testing.
+try {
+    val result : User = apiInstance.getUserByName(username)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#getUserByName")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#getUserByName")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The name that needs to be fetched. Use user1 for testing. |
+
+### Return type
+
+[**User**](User.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="loginUser"></a>
+# **loginUser**
+> kotlin.String loginUser(username, password)
+
+Logs user into the system
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The user name for login
+val password : kotlin.String = password_example // kotlin.String | The password for login in clear text
+try {
+    val result : kotlin.String = apiInstance.loginUser(username, password)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#loginUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#loginUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The user name for login |
+ **password** | **kotlin.String**| The password for login in clear text |
+
+### Return type
+
+**kotlin.String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="logoutUser"></a>
+# **logoutUser**
+> logoutUser()
+
+Logs out current logged in user session
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+try {
+    apiInstance.logoutUser()
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#logoutUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#logoutUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="updateUser"></a>
+# **updateUser**
+> updateUser(username, body)
+
+Updated user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | name that need to be deleted
+val body : User =  // User | Updated user object
+try {
+    apiInstance.updateUser(username, body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#updateUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#updateUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| name that need to be deleted |
+ **body** | [**User**](User.md)| Updated user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+

samples/client/petstore/kotlin-kotlinx-datetime/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-all.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

samples/client/petstore/kotlin-kotlinx-datetime/gradlew

@@ -0,0 +1,245 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

samples/client/petstore/kotlin-kotlinx-datetime/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

samples/client/petstore/kotlin-kotlinx-datetime/settings.gradle

@@ -0,0 +1,2 @@
+
+rootProject.name = 'kotlin-petstore-threetenbp'

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -0,0 +1,650 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import java.io.IOException
+import okhttp3.OkHttpClient
+import okhttp3.HttpUrl
+
+import org.openapitools.client.models.ModelApiResponse
+import org.openapitools.client.models.Pet
+
+import com.squareup.moshi.Json
+
+import org.openapitools.client.infrastructure.ApiClient
+import org.openapitools.client.infrastructure.ApiResponse
+import org.openapitools.client.infrastructure.ClientException
+import org.openapitools.client.infrastructure.ClientError
+import org.openapitools.client.infrastructure.ServerException
+import org.openapitools.client.infrastructure.ServerError
+import org.openapitools.client.infrastructure.MultiValueMap
+import org.openapitools.client.infrastructure.PartConfig
+import org.openapitools.client.infrastructure.RequestConfig
+import org.openapitools.client.infrastructure.RequestMethod
+import org.openapitools.client.infrastructure.ResponseType
+import org.openapitools.client.infrastructure.Success
+import org.openapitools.client.infrastructure.toMultiValue
+
+class PetApi(basePath: kotlin.String = defaultBasePath, client: OkHttpClient = ApiClient.defaultClient) : ApiClient(basePath, client) {
+    companion object {
+        @JvmStatic
+        val defaultBasePath: String by lazy {
+            System.getProperties().getProperty(ApiClient.baseUrlKey, "http://petstore.swagger.io/v2")
+        }
+    }
+
+    /**
+     * Add a new pet to the store
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun addPet(body: Pet) : Unit {
+        val localVarResponse = addPetWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Add a new pet to the store
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun addPetWithHttpInfo(body: Pet) : ApiResponse<Unit?> {
+        val localVariableConfig = addPetRequestConfig(body = body)
+
+        return request<Pet, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation addPet
+     *
+     * @param body Pet object that needs to be added to the store
+     * @return RequestConfig
+     */
+    fun addPetRequestConfig(body: Pet) : RequestConfig<Pet> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Content-Type"] = "application/json"
+        
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/pet",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete
+     * @param apiKey  (optional)
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun deletePet(petId: kotlin.Long, apiKey: kotlin.String? = null) : Unit {
+        val localVarResponse = deletePetWithHttpInfo(petId = petId, apiKey = apiKey)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete
+     * @param apiKey  (optional)
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun deletePetWithHttpInfo(petId: kotlin.Long, apiKey: kotlin.String?) : ApiResponse<Unit?> {
+        val localVariableConfig = deletePetRequestConfig(petId = petId, apiKey = apiKey)
+
+        return request<Unit, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation deletePet
+     *
+     * @param petId Pet id to delete
+     * @param apiKey  (optional)
+     * @return RequestConfig
+     */
+    fun deletePetRequestConfig(petId: kotlin.Long, apiKey: kotlin.String?) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        apiKey?.apply { localVariableHeaders["api_key"] = this.toString() }
+        
+        return RequestConfig(
+            method = RequestMethod.DELETE,
+            path = "/pet/{petId}".replace("{"+"petId"+"}", encodeURIComponent(petId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * enum for parameter status
+     */
+     enum class StatusFindPetsByStatus(val value: kotlin.String) {
+         @Json(name = "available") available("available"),
+         @Json(name = "pending") pending("pending"),
+         @Json(name = "sold") sold("sold")
+     }
+
+    /**
+     * Finds Pets by status
+     * Multiple status values can be provided with comma separated strings
+     * @param status Status values that need to be considered for filter
+     * @return kotlin.collections.List<Pet>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun findPetsByStatus(status: kotlin.collections.List<StatusFindPetsByStatus>) : kotlin.collections.List<Pet> {
+        val localVarResponse = findPetsByStatusWithHttpInfo(status = status)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as kotlin.collections.List<Pet>
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Finds Pets by status
+     * Multiple status values can be provided with comma separated strings
+     * @param status Status values that need to be considered for filter
+     * @return ApiResponse<kotlin.collections.List<Pet>?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun findPetsByStatusWithHttpInfo(status: kotlin.collections.List<StatusFindPetsByStatus>) : ApiResponse<kotlin.collections.List<Pet>?> {
+        val localVariableConfig = findPetsByStatusRequestConfig(status = status)
+
+        return request<Unit, kotlin.collections.List<Pet>>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation findPetsByStatus
+     *
+     * @param status Status values that need to be considered for filter
+     * @return RequestConfig
+     */
+    fun findPetsByStatusRequestConfig(status: kotlin.collections.List<StatusFindPetsByStatus>) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf<kotlin.String, kotlin.collections.List<kotlin.String>>()
+            .apply {
+                put("status", toMultiValue(status.toList(), "csv"))
+            }
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/pet/findByStatus",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Finds Pets by tags
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     * @param tags Tags to filter by
+     * @return kotlin.collections.List<Pet>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    @Deprecated(message = "This operation is deprecated.")
+    fun findPetsByTags(tags: kotlin.collections.List<kotlin.String>) : kotlin.collections.List<Pet> {
+        @Suppress("DEPRECATION")
+        val localVarResponse = findPetsByTagsWithHttpInfo(tags = tags)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as kotlin.collections.List<Pet>
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Finds Pets by tags
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     * @param tags Tags to filter by
+     * @return ApiResponse<kotlin.collections.List<Pet>?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    @Deprecated(message = "This operation is deprecated.")
+    fun findPetsByTagsWithHttpInfo(tags: kotlin.collections.List<kotlin.String>) : ApiResponse<kotlin.collections.List<Pet>?> {
+        @Suppress("DEPRECATION")
+        val localVariableConfig = findPetsByTagsRequestConfig(tags = tags)
+
+        return request<Unit, kotlin.collections.List<Pet>>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation findPetsByTags
+     *
+     * @param tags Tags to filter by
+     * @return RequestConfig
+     */
+    @Deprecated(message = "This operation is deprecated.")
+    fun findPetsByTagsRequestConfig(tags: kotlin.collections.List<kotlin.String>) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf<kotlin.String, kotlin.collections.List<kotlin.String>>()
+            .apply {
+                put("tags", toMultiValue(tags.toList(), "csv"))
+            }
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/pet/findByTags",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return
+     * @return Pet
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun getPetById(petId: kotlin.Long) : Pet {
+        val localVarResponse = getPetByIdWithHttpInfo(petId = petId)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as Pet
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return
+     * @return ApiResponse<Pet?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun getPetByIdWithHttpInfo(petId: kotlin.Long) : ApiResponse<Pet?> {
+        val localVariableConfig = getPetByIdRequestConfig(petId = petId)
+
+        return request<Unit, Pet>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation getPetById
+     *
+     * @param petId ID of pet to return
+     * @return RequestConfig
+     */
+    fun getPetByIdRequestConfig(petId: kotlin.Long) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/pet/{petId}".replace("{"+"petId"+"}", encodeURIComponent(petId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Update an existing pet
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun updatePet(body: Pet) : Unit {
+        val localVarResponse = updatePetWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Update an existing pet
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun updatePetWithHttpInfo(body: Pet) : ApiResponse<Unit?> {
+        val localVariableConfig = updatePetRequestConfig(body = body)
+
+        return request<Pet, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation updatePet
+     *
+     * @param body Pet object that needs to be added to the store
+     * @return RequestConfig
+     */
+    fun updatePetRequestConfig(body: Pet) : RequestConfig<Pet> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Content-Type"] = "application/json"
+        
+        return RequestConfig(
+            method = RequestMethod.PUT,
+            path = "/pet",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Updates a pet in the store with form data
+     * 
+     * @param petId ID of pet that needs to be updated
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun updatePetWithForm(petId: kotlin.Long, name: kotlin.String? = null, status: kotlin.String? = null) : Unit {
+        val localVarResponse = updatePetWithFormWithHttpInfo(petId = petId, name = name, status = status)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Updates a pet in the store with form data
+     * 
+     * @param petId ID of pet that needs to be updated
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun updatePetWithFormWithHttpInfo(petId: kotlin.Long, name: kotlin.String?, status: kotlin.String?) : ApiResponse<Unit?> {
+        val localVariableConfig = updatePetWithFormRequestConfig(petId = petId, name = name, status = status)
+
+        return request<Map<String, PartConfig<*>>, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation updatePetWithForm
+     *
+     * @param petId ID of pet that needs to be updated
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     * @return RequestConfig
+     */
+    fun updatePetWithFormRequestConfig(petId: kotlin.Long, name: kotlin.String?, status: kotlin.String?) : RequestConfig<Map<String, PartConfig<*>>> {
+        val localVariableBody = mapOf(
+            "name" to PartConfig(body = name, headers = mutableMapOf()),
+            "status" to PartConfig(body = status, headers = mutableMapOf()),)
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf("Content-Type" to "application/x-www-form-urlencoded")
+        
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/pet/{petId}".replace("{"+"petId"+"}", encodeURIComponent(petId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * uploads an image
+     * 
+     * @param petId ID of pet to update
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @return ModelApiResponse
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String? = null, file: java.io.File? = null) : ModelApiResponse {
+        val localVarResponse = uploadFileWithHttpInfo(petId = petId, additionalMetadata = additionalMetadata, file = file)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as ModelApiResponse
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * uploads an image
+     * 
+     * @param petId ID of pet to update
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @return ApiResponse<ModelApiResponse?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun uploadFileWithHttpInfo(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: java.io.File?) : ApiResponse<ModelApiResponse?> {
+        val localVariableConfig = uploadFileRequestConfig(petId = petId, additionalMetadata = additionalMetadata, file = file)
+
+        return request<Map<String, PartConfig<*>>, ModelApiResponse>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation uploadFile
+     *
+     * @param petId ID of pet to update
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @return RequestConfig
+     */
+    fun uploadFileRequestConfig(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: java.io.File?) : RequestConfig<Map<String, PartConfig<*>>> {
+        val localVariableBody = mapOf(
+            "additionalMetadata" to PartConfig(body = additionalMetadata, headers = mutableMapOf()),
+            "file" to PartConfig(body = file, headers = mutableMapOf()),)
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf("Content-Type" to "multipart/form-data")
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/pet/{petId}/uploadImage".replace("{"+"petId"+"}", encodeURIComponent(petId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+
+    private fun encodeURIComponent(uriComponent: kotlin.String): kotlin.String =
+        HttpUrl.Builder().scheme("http").host("localhost").addPathSegment(uriComponent).build().encodedPathSegments[0]
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/apis/StoreApi.kt

@@ -0,0 +1,329 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import java.io.IOException
+import okhttp3.OkHttpClient
+import okhttp3.HttpUrl
+
+import org.openapitools.client.models.Order
+
+import com.squareup.moshi.Json
+
+import org.openapitools.client.infrastructure.ApiClient
+import org.openapitools.client.infrastructure.ApiResponse
+import org.openapitools.client.infrastructure.ClientException
+import org.openapitools.client.infrastructure.ClientError
+import org.openapitools.client.infrastructure.ServerException
+import org.openapitools.client.infrastructure.ServerError
+import org.openapitools.client.infrastructure.MultiValueMap
+import org.openapitools.client.infrastructure.PartConfig
+import org.openapitools.client.infrastructure.RequestConfig
+import org.openapitools.client.infrastructure.RequestMethod
+import org.openapitools.client.infrastructure.ResponseType
+import org.openapitools.client.infrastructure.Success
+import org.openapitools.client.infrastructure.toMultiValue
+
+class StoreApi(basePath: kotlin.String = defaultBasePath, client: OkHttpClient = ApiClient.defaultClient) : ApiClient(basePath, client) {
+    companion object {
+        @JvmStatic
+        val defaultBasePath: String by lazy {
+            System.getProperties().getProperty(ApiClient.baseUrlKey, "http://petstore.swagger.io/v2")
+        }
+    }
+
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun deleteOrder(orderId: kotlin.String) : Unit {
+        val localVarResponse = deleteOrderWithHttpInfo(orderId = orderId)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun deleteOrderWithHttpInfo(orderId: kotlin.String) : ApiResponse<Unit?> {
+        val localVariableConfig = deleteOrderRequestConfig(orderId = orderId)
+
+        return request<Unit, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation deleteOrder
+     *
+     * @param orderId ID of the order that needs to be deleted
+     * @return RequestConfig
+     */
+    fun deleteOrderRequestConfig(orderId: kotlin.String) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.DELETE,
+            path = "/store/order/{orderId}".replace("{"+"orderId"+"}", encodeURIComponent(orderId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     * @return kotlin.collections.Map<kotlin.String, kotlin.Int>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun getInventory() : kotlin.collections.Map<kotlin.String, kotlin.Int> {
+        val localVarResponse = getInventoryWithHttpInfo()
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as kotlin.collections.Map<kotlin.String, kotlin.Int>
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     * @return ApiResponse<kotlin.collections.Map<kotlin.String, kotlin.Int>?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun getInventoryWithHttpInfo() : ApiResponse<kotlin.collections.Map<kotlin.String, kotlin.Int>?> {
+        val localVariableConfig = getInventoryRequestConfig()
+
+        return request<Unit, kotlin.collections.Map<kotlin.String, kotlin.Int>>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation getInventory
+     *
+     * @return RequestConfig
+     */
+    fun getInventoryRequestConfig() : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/store/inventory",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Find purchase order by ID
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+     * @param orderId ID of pet that needs to be fetched
+     * @return Order
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun getOrderById(orderId: kotlin.Long) : Order {
+        val localVarResponse = getOrderByIdWithHttpInfo(orderId = orderId)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as Order
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Find purchase order by ID
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+     * @param orderId ID of pet that needs to be fetched
+     * @return ApiResponse<Order?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun getOrderByIdWithHttpInfo(orderId: kotlin.Long) : ApiResponse<Order?> {
+        val localVariableConfig = getOrderByIdRequestConfig(orderId = orderId)
+
+        return request<Unit, Order>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation getOrderById
+     *
+     * @param orderId ID of pet that needs to be fetched
+     * @return RequestConfig
+     */
+    fun getOrderByIdRequestConfig(orderId: kotlin.Long) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/store/order/{orderId}".replace("{"+"orderId"+"}", encodeURIComponent(orderId.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param body order placed for purchasing the pet
+     * @return Order
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun placeOrder(body: Order) : Order {
+        val localVarResponse = placeOrderWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as Order
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param body order placed for purchasing the pet
+     * @return ApiResponse<Order?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun placeOrderWithHttpInfo(body: Order) : ApiResponse<Order?> {
+        val localVariableConfig = placeOrderRequestConfig(body = body)
+
+        return request<Order, Order>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation placeOrder
+     *
+     * @param body order placed for purchasing the pet
+     * @return RequestConfig
+     */
+    fun placeOrderRequestConfig(body: Order) : RequestConfig<Order> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/store/order",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+
+    private fun encodeURIComponent(uriComponent: kotlin.String): kotlin.String =
+        HttpUrl.Builder().scheme("http").host("localhost").addPathSegment(uriComponent).build().encodedPathSegments[0]
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/apis/UserApi.kt

@@ -0,0 +1,608 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import java.io.IOException
+import okhttp3.OkHttpClient
+import okhttp3.HttpUrl
+
+import org.openapitools.client.models.User
+
+import com.squareup.moshi.Json
+
+import org.openapitools.client.infrastructure.ApiClient
+import org.openapitools.client.infrastructure.ApiResponse
+import org.openapitools.client.infrastructure.ClientException
+import org.openapitools.client.infrastructure.ClientError
+import org.openapitools.client.infrastructure.ServerException
+import org.openapitools.client.infrastructure.ServerError
+import org.openapitools.client.infrastructure.MultiValueMap
+import org.openapitools.client.infrastructure.PartConfig
+import org.openapitools.client.infrastructure.RequestConfig
+import org.openapitools.client.infrastructure.RequestMethod
+import org.openapitools.client.infrastructure.ResponseType
+import org.openapitools.client.infrastructure.Success
+import org.openapitools.client.infrastructure.toMultiValue
+
+class UserApi(basePath: kotlin.String = defaultBasePath, client: OkHttpClient = ApiClient.defaultClient) : ApiClient(basePath, client) {
+    companion object {
+        @JvmStatic
+        val defaultBasePath: String by lazy {
+            System.getProperties().getProperty(ApiClient.baseUrlKey, "http://petstore.swagger.io/v2")
+        }
+    }
+
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param body Created user object
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun createUser(body: User) : Unit {
+        val localVarResponse = createUserWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param body Created user object
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun createUserWithHttpInfo(body: User) : ApiResponse<Unit?> {
+        val localVariableConfig = createUserRequestConfig(body = body)
+
+        return request<User, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation createUser
+     *
+     * @param body Created user object
+     * @return RequestConfig
+     */
+    fun createUserRequestConfig(body: User) : RequestConfig<User> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/user",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun createUsersWithArrayInput(body: kotlin.collections.List<User>) : Unit {
+        val localVarResponse = createUsersWithArrayInputWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun createUsersWithArrayInputWithHttpInfo(body: kotlin.collections.List<User>) : ApiResponse<Unit?> {
+        val localVariableConfig = createUsersWithArrayInputRequestConfig(body = body)
+
+        return request<kotlin.collections.List<User>, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation createUsersWithArrayInput
+     *
+     * @param body List of user object
+     * @return RequestConfig
+     */
+    fun createUsersWithArrayInputRequestConfig(body: kotlin.collections.List<User>) : RequestConfig<kotlin.collections.List<User>> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/user/createWithArray",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun createUsersWithListInput(body: kotlin.collections.List<User>) : Unit {
+        val localVarResponse = createUsersWithListInputWithHttpInfo(body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun createUsersWithListInputWithHttpInfo(body: kotlin.collections.List<User>) : ApiResponse<Unit?> {
+        val localVariableConfig = createUsersWithListInputRequestConfig(body = body)
+
+        return request<kotlin.collections.List<User>, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation createUsersWithListInput
+     *
+     * @param body List of user object
+     * @return RequestConfig
+     */
+    fun createUsersWithListInputRequestConfig(body: kotlin.collections.List<User>) : RequestConfig<kotlin.collections.List<User>> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.POST,
+            path = "/user/createWithList",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Delete user
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun deleteUser(username: kotlin.String) : Unit {
+        val localVarResponse = deleteUserWithHttpInfo(username = username)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Delete user
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun deleteUserWithHttpInfo(username: kotlin.String) : ApiResponse<Unit?> {
+        val localVariableConfig = deleteUserRequestConfig(username = username)
+
+        return request<Unit, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation deleteUser
+     *
+     * @param username The name that needs to be deleted
+     * @return RequestConfig
+     */
+    fun deleteUserRequestConfig(username: kotlin.String) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.DELETE,
+            path = "/user/{username}".replace("{"+"username"+"}", encodeURIComponent(username.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.
+     * @return User
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun getUserByName(username: kotlin.String) : User {
+        val localVarResponse = getUserByNameWithHttpInfo(username = username)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as User
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.
+     * @return ApiResponse<User?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun getUserByNameWithHttpInfo(username: kotlin.String) : ApiResponse<User?> {
+        val localVariableConfig = getUserByNameRequestConfig(username = username)
+
+        return request<Unit, User>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation getUserByName
+     *
+     * @param username The name that needs to be fetched. Use user1 for testing.
+     * @return RequestConfig
+     */
+    fun getUserByNameRequestConfig(username: kotlin.String) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/user/{username}".replace("{"+"username"+"}", encodeURIComponent(username.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Logs user into the system
+     * 
+     * @param username The user name for login
+     * @param password The password for login in clear text
+     * @return kotlin.String
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun loginUser(username: kotlin.String, password: kotlin.String) : kotlin.String {
+        val localVarResponse = loginUserWithHttpInfo(username = username, password = password)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> (localVarResponse as Success<*>).data as kotlin.String
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Logs user into the system
+     * 
+     * @param username The user name for login
+     * @param password The password for login in clear text
+     * @return ApiResponse<kotlin.String?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Suppress("UNCHECKED_CAST")
+    @Throws(IllegalStateException::class, IOException::class)
+    fun loginUserWithHttpInfo(username: kotlin.String, password: kotlin.String) : ApiResponse<kotlin.String?> {
+        val localVariableConfig = loginUserRequestConfig(username = username, password = password)
+
+        return request<Unit, kotlin.String>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation loginUser
+     *
+     * @param username The user name for login
+     * @param password The password for login in clear text
+     * @return RequestConfig
+     */
+    fun loginUserRequestConfig(username: kotlin.String, password: kotlin.String) : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf<kotlin.String, kotlin.collections.List<kotlin.String>>()
+            .apply {
+                put("username", listOf(username.toString()))
+                put("password", listOf(password.toString()))
+            }
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        localVariableHeaders["Accept"] = "application/json"
+
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/user/login",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Logs out current logged in user session
+     * 
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun logoutUser() : Unit {
+        val localVarResponse = logoutUserWithHttpInfo()
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Logs out current logged in user session
+     * 
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun logoutUserWithHttpInfo() : ApiResponse<Unit?> {
+        val localVariableConfig = logoutUserRequestConfig()
+
+        return request<Unit, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation logoutUser
+     *
+     * @return RequestConfig
+     */
+    fun logoutUserRequestConfig() : RequestConfig<Unit> {
+        val localVariableBody = null
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.GET,
+            path = "/user/logout",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+    /**
+     * Updated user
+     * This can only be done by the logged in user.
+     * @param username name that need to be deleted
+     * @param body Updated user object
+     * @return void
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     * @throws UnsupportedOperationException If the API returns an informational or redirection response
+     * @throws ClientException If the API returns a client error response
+     * @throws ServerException If the API returns a server error response
+     */
+    @Throws(IllegalStateException::class, IOException::class, UnsupportedOperationException::class, ClientException::class, ServerException::class)
+    fun updateUser(username: kotlin.String, body: User) : Unit {
+        val localVarResponse = updateUserWithHttpInfo(username = username, body = body)
+
+        return when (localVarResponse.responseType) {
+            ResponseType.Success -> Unit
+            ResponseType.Informational -> throw UnsupportedOperationException("Client does not support Informational responses.")
+            ResponseType.Redirection -> throw UnsupportedOperationException("Client does not support Redirection responses.")
+            ResponseType.ClientError -> {
+                val localVarError = localVarResponse as ClientError<*>
+                throw ClientException("Client error : ${localVarError.statusCode} ${localVarError.message.orEmpty()}", localVarError.statusCode, localVarResponse)
+            }
+            ResponseType.ServerError -> {
+                val localVarError = localVarResponse as ServerError<*>
+                throw ServerException("Server error : ${localVarError.statusCode} ${localVarError.message.orEmpty()} ${localVarError.body}", localVarError.statusCode, localVarResponse)
+            }
+        }
+    }
+
+    /**
+     * Updated user
+     * This can only be done by the logged in user.
+     * @param username name that need to be deleted
+     * @param body Updated user object
+     * @return ApiResponse<Unit?>
+     * @throws IllegalStateException If the request is not correctly configured
+     * @throws IOException Rethrows the OkHttp execute method exception
+     */
+    @Throws(IllegalStateException::class, IOException::class)
+    fun updateUserWithHttpInfo(username: kotlin.String, body: User) : ApiResponse<Unit?> {
+        val localVariableConfig = updateUserRequestConfig(username = username, body = body)
+
+        return request<User, Unit>(
+            localVariableConfig
+        )
+    }
+
+    /**
+     * To obtain the request config of the operation updateUser
+     *
+     * @param username name that need to be deleted
+     * @param body Updated user object
+     * @return RequestConfig
+     */
+    fun updateUserRequestConfig(username: kotlin.String, body: User) : RequestConfig<User> {
+        val localVariableBody = body
+        val localVariableQuery: MultiValueMap = mutableMapOf()
+        val localVariableHeaders: MutableMap<String, String> = mutableMapOf()
+        
+        return RequestConfig(
+            method = RequestMethod.PUT,
+            path = "/user/{username}".replace("{"+"username"+"}", encodeURIComponent(username.toString())),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+            body = localVariableBody
+        )
+    }
+
+
+    private fun encodeURIComponent(uriComponent: kotlin.String): kotlin.String =
+        HttpUrl.Builder().scheme("http").host("localhost").addPathSegment(uriComponent).build().encodedPathSegments[0]
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt

@@ -0,0 +1,23 @@
+package org.openapitools.client.infrastructure
+
+typealias MultiValueMap = MutableMap<String,List<String>>
+
+fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
+    "csv" -> ","
+    "tsv" -> "\t"
+    "pipe" -> "|"
+    "space" -> " "
+    else -> ""
+}
+
+val defaultMultiValueConverter: (item: Any?) -> String = { item -> "$item" }
+
+fun <T : Any?> toMultiValue(items: Array<T>, collectionFormat: String, map: (item: T) -> String = defaultMultiValueConverter)
+        = toMultiValue(items.asIterable(), collectionFormat, map)
+
+fun <T : Any?> toMultiValue(items: Iterable<T>, collectionFormat: String, map: (item: T) -> String = defaultMultiValueConverter): List<String> {
+    return when(collectionFormat) {
+        "multi" -> items.map(map)
+        else -> listOf(items.joinToString(separator = collectionDelimiter(collectionFormat), transform = map))
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -0,0 +1,270 @@
+package org.openapitools.client.infrastructure
+
+import okhttp3.OkHttpClient
+import okhttp3.RequestBody
+import okhttp3.RequestBody.Companion.asRequestBody
+import okhttp3.RequestBody.Companion.toRequestBody
+import okhttp3.FormBody
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
+import okhttp3.ResponseBody
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.Request
+import okhttp3.Headers
+import okhttp3.Headers.Companion.toHeaders
+import okhttp3.MultipartBody
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.Response
+import okhttp3.internal.EMPTY_REQUEST
+import java.io.BufferedWriter
+import java.io.File
+import java.io.FileWriter
+import java.io.IOException
+import java.net.URLConnection
+import java.time.LocalDate
+import java.time.LocalDateTime
+import java.time.LocalTime
+import java.time.OffsetDateTime
+import java.time.OffsetTime
+import java.util.Locale
+import com.squareup.moshi.adapter
+
+open class ApiClient(val baseUrl: String, val client: OkHttpClient = defaultClient) {
+    companion object {
+        protected const val ContentType = "Content-Type"
+        protected const val Accept = "Accept"
+        protected const val Authorization = "Authorization"
+        protected const val JsonMediaType = "application/json"
+        protected const val FormDataMediaType = "multipart/form-data"
+        protected const val FormUrlEncMediaType = "application/x-www-form-urlencoded"
+        protected const val XmlMediaType = "application/xml"
+        protected const val OctetMediaType = "application/octet-stream"
+
+        val apiKey: MutableMap<String, String> = mutableMapOf()
+        val apiKeyPrefix: MutableMap<String, String> = mutableMapOf()
+        var username: String? = null
+        var password: String? = null
+        var accessToken: String? = null
+        const val baseUrlKey = "org.openapitools.client.baseUrl"
+
+        @JvmStatic
+        val defaultClient: OkHttpClient by lazy {
+            builder.build()
+        }
+
+        @JvmStatic
+        val builder: OkHttpClient.Builder = OkHttpClient.Builder()
+    }
+
+    /**
+     * Guess Content-Type header from the given file (defaults to "application/octet-stream").
+     *
+     * @param file The given file
+     * @return The guessed Content-Type
+     */
+    protected fun guessContentTypeFromFile(file: File): String {
+        val contentType = URLConnection.guessContentTypeFromName(file.name)
+        return contentType ?: "application/octet-stream"
+    }
+
+    protected inline fun <reified T> requestBody(content: T, mediaType: String?): RequestBody =
+        when {
+            content is File -> content.asRequestBody((mediaType ?: guessContentTypeFromFile(content)).toMediaTypeOrNull())
+            mediaType == FormDataMediaType ->
+                MultipartBody.Builder()
+                    .setType(MultipartBody.FORM)
+                    .apply {
+                        // content's type *must* be Map<String, PartConfig<*>>
+                        @Suppress("UNCHECKED_CAST")
+                        (content as Map<String, PartConfig<*>>).forEach { (name, part) ->
+                            if (part.body is File) {
+                                val partHeaders = part.headers.toMutableMap() +
+                                    ("Content-Disposition" to "form-data; name=\"$name\"; filename=\"${part.body.name}\"")
+                                val fileMediaType = guessContentTypeFromFile(part.body).toMediaTypeOrNull()
+                                addPart(
+                                    partHeaders.toHeaders(),
+                                    part.body.asRequestBody(fileMediaType)
+                                )
+                            } else {
+                                val partHeaders = part.headers.toMutableMap() +
+                                    ("Content-Disposition" to "form-data; name=\"$name\"")
+                                addPart(
+                                    partHeaders.toHeaders(),
+                                    parameterToString(part.body).toRequestBody(null)
+                                )
+                            }
+                        }
+                    }.build()
+            mediaType == FormUrlEncMediaType -> {
+                FormBody.Builder().apply {
+                    // content's type *must* be Map<String, PartConfig<*>>
+                    @Suppress("UNCHECKED_CAST")
+                    (content as Map<String, PartConfig<*>>).forEach { (name, part) ->
+                        add(name, parameterToString(part.body))
+                    }
+                }.build()
+            }
+            mediaType == null || mediaType.startsWith("application/") && mediaType.endsWith("json") ->
+                if (content == null) {
+                    EMPTY_REQUEST
+                } else {
+                    Serializer.moshi.adapter(T::class.java).toJson(content)
+                        .toRequestBody((mediaType ?: JsonMediaType).toMediaTypeOrNull())
+                }
+            mediaType == XmlMediaType -> throw UnsupportedOperationException("xml not currently supported.")
+            mediaType == OctetMediaType && content is ByteArray ->
+                content.toRequestBody(OctetMediaType.toMediaTypeOrNull())
+            // TODO: this should be extended with other serializers
+            else -> throw UnsupportedOperationException("requestBody currently only supports JSON body, byte body and File body.")
+        }
+
+    @OptIn(ExperimentalStdlibApi::class)
+    protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
+        if(body == null) {
+            return null
+        }
+        if (T::class.java == File::class.java) {
+            // return tempFile
+            // Attention: if you are developing an android app that supports API Level 25 and bellow, please check flag supportAndroidApiLevel25AndBelow in https://openapi-generator.tech/docs/generators/kotlin#config-options
+            val tempFile = java.nio.file.Files.createTempFile("tmp.org.openapitools.client", null).toFile()
+            tempFile.deleteOnExit()
+            body.byteStream().use { inputStream ->
+                tempFile.outputStream().use { tempFileOutputStream ->
+                    inputStream.copyTo(tempFileOutputStream)
+                }
+            }
+            return tempFile as T
+        }
+
+        return when {
+            mediaType == null || (mediaType.startsWith("application/") && mediaType.endsWith("json")) -> {
+                val bodyContent = body.string()
+                if (bodyContent.isEmpty()) {
+                    return null
+                }
+                Serializer.moshi.adapter<T>().fromJson(bodyContent)
+            }
+            mediaType == OctetMediaType -> body.bytes() as? T
+            else ->  throw UnsupportedOperationException("responseBody currently only supports JSON body.")
+        }
+    }
+
+    protected fun <T> updateAuthParams(requestConfig: RequestConfig<T>) {
+        if (requestConfig.headers[Authorization].isNullOrEmpty()) {
+            accessToken?.let { accessToken ->
+                requestConfig.headers[Authorization] = "Bearer $accessToken "
+            }
+        }
+        if (requestConfig.headers["api_key"].isNullOrEmpty()) {
+            if (apiKey["api_key"] != null) {
+                if (apiKeyPrefix["api_key"] != null) {
+                    requestConfig.headers["api_key"] = apiKeyPrefix["api_key"]!! + " " + apiKey["api_key"]!!
+                } else {
+                    requestConfig.headers["api_key"] = apiKey["api_key"]!!
+                }
+            }
+        }
+    }
+
+    protected inline fun <reified I, reified T: Any?> request(requestConfig: RequestConfig<I>): ApiResponse<T?> {
+        val httpUrl = baseUrl.toHttpUrlOrNull() ?: throw IllegalStateException("baseUrl is invalid.")
+
+        // take authMethod from operation
+        updateAuthParams(requestConfig)
+
+        val url = httpUrl.newBuilder()
+            .addEncodedPathSegments(requestConfig.path.trimStart('/'))
+            .apply {
+                requestConfig.query.forEach { query ->
+                    query.value.forEach { queryValue ->
+                        addQueryParameter(query.key, queryValue)
+                    }
+                }
+            }.build()
+
+        // take content-type/accept from spec or set to default (application/json) if not defined
+        if (requestConfig.body != null && requestConfig.headers[ContentType].isNullOrEmpty()) {
+            requestConfig.headers[ContentType] = JsonMediaType
+        }
+        if (requestConfig.headers[Accept].isNullOrEmpty()) {
+            requestConfig.headers[Accept] = JsonMediaType
+        }
+        val headers = requestConfig.headers
+
+        if (headers[Accept].isNullOrEmpty()) {
+            throw kotlin.IllegalStateException("Missing Accept header. This is required.")
+        }
+
+        val contentType = if (headers[ContentType] != null) {
+            // TODO: support multiple contentType options here.
+            (headers[ContentType] as String).substringBefore(";").lowercase(Locale.US)
+        } else {
+            null
+        }
+
+        val request = when (requestConfig.method) {
+            RequestMethod.DELETE -> Request.Builder().url(url).delete(requestBody(requestConfig.body, contentType))
+            RequestMethod.GET -> Request.Builder().url(url)
+            RequestMethod.HEAD -> Request.Builder().url(url).head()
+            RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(requestConfig.body, contentType))
+            RequestMethod.PUT -> Request.Builder().url(url).put(requestBody(requestConfig.body, contentType))
+            RequestMethod.POST -> Request.Builder().url(url).post(requestBody(requestConfig.body, contentType))
+            RequestMethod.OPTIONS -> Request.Builder().url(url).method("OPTIONS", null)
+        }.apply {
+            headers.forEach { header -> addHeader(header.key, header.value) }
+        }.build()
+
+        val response = client.newCall(request).execute()
+
+        val accept = response.header(ContentType)?.substringBefore(";")?.lowercase(Locale.US)
+
+        // TODO: handle specific mapping types. e.g. Map<int, Class<?>>
+        return when {
+            response.isRedirect -> Redirection(
+                response.code,
+                response.headers.toMultimap()
+            )
+            response.isInformational -> Informational(
+                response.message,
+                response.code,
+                response.headers.toMultimap()
+            )
+            response.isSuccessful -> Success(
+                responseBody(response.body, accept),
+                response.code,
+                response.headers.toMultimap()
+            )
+            response.isClientError -> ClientError(
+                response.message,
+                response.body?.string(),
+                response.code,
+                response.headers.toMultimap()
+            )
+            else -> ServerError(
+                response.message,
+                response.body?.string(),
+                response.code,
+                response.headers.toMultimap()
+            )
+        }
+    }
+
+    protected fun parameterToString(value: Any?): String = when (value) {
+        null -> ""
+        is Array<*> -> toMultiValue(value, "csv").toString()
+        is Iterable<*> -> toMultiValue(value, "csv").toString()
+        is OffsetDateTime, is OffsetTime, is LocalDateTime, is LocalDate, is LocalTime ->
+            parseDateToQueryString(value)
+        else -> value.toString()
+    }
+
+    protected inline fun <reified T: Any> parseDateToQueryString(value : T): String {
+        /*
+        .replace("\"", "") converts the json object string to an actual string for the query parameter.
+        The moshi or gson adapter allows a more generic solution instead of trying to use a native
+        formatter. It also easily allows to provide a simple way to define a custom date format pattern
+        inside a gson/moshi adapter.
+        */
+        return Serializer.moshi.adapter(T::class.java).toJson(value).replace("\"", "")
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/ApiResponse.kt

@@ -0,0 +1,43 @@
+package org.openapitools.client.infrastructure
+
+enum class ResponseType {
+    Success, Informational, Redirection, ClientError, ServerError
+}
+
+interface Response
+
+abstract class ApiResponse<T>(val responseType: ResponseType): Response {
+    abstract val statusCode: Int
+    abstract val headers: Map<String,List<String>>
+}
+
+class Success<T>(
+    val data: T,
+    override val statusCode: Int = -1,
+    override val headers: Map<String, List<String>> = mapOf()
+): ApiResponse<T>(ResponseType.Success)
+
+class Informational<T>(
+    val statusText: String,
+    override val statusCode: Int = -1,
+    override val headers: Map<String, List<String>> = mapOf()
+) : ApiResponse<T>(ResponseType.Informational)
+
+class Redirection<T>(
+    override val statusCode: Int = -1,
+    override val headers: Map<String, List<String>> = mapOf()
+) : ApiResponse<T>(ResponseType.Redirection)
+
+class ClientError<T>(
+    val message: String? = null,
+    val body: Any? = null,
+    override val statusCode: Int = -1,
+    override val headers: Map<String, List<String>> = mapOf()
+) : ApiResponse<T>(ResponseType.ClientError)
+
+class ServerError<T>(
+    val message: String? = null,
+    val body: Any? = null,
+    override val statusCode: Int = -1,
+    override val headers: Map<String, List<String>>
+): ApiResponse<T>(ResponseType.ServerError)

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/BigDecimalAdapter.kt

@@ -0,0 +1,17 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.math.BigDecimal
+
+class BigDecimalAdapter {
+    @ToJson
+    fun toJson(value: BigDecimal): String {
+        return value.toPlainString()
+    }
+
+    @FromJson
+    fun fromJson(value: String): BigDecimal {
+        return BigDecimal(value)
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/BigIntegerAdapter.kt

@@ -0,0 +1,17 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.math.BigInteger
+
+class BigIntegerAdapter {
+    @ToJson
+    fun toJson(value: BigInteger): String {
+        return value.toString()
+    }
+
+    @FromJson
+    fun fromJson(value: String): BigInteger {
+        return BigInteger(value)
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/ByteArrayAdapter.kt

@@ -0,0 +1,12 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+
+class ByteArrayAdapter {
+    @ToJson
+    fun toJson(data: ByteArray): String = String(data)
+
+    @FromJson
+    fun fromJson(data: String): ByteArray = data.toByteArray()
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/Errors.kt

@@ -0,0 +1,18 @@
+@file:Suppress("unused")
+package org.openapitools.client.infrastructure
+
+import java.lang.RuntimeException
+
+open class ClientException(message: kotlin.String? = null, val statusCode: Int = -1, val response: Response? = null) : RuntimeException(message) {
+
+    companion object {
+        private const val serialVersionUID: Long = 123L
+    }
+}
+
+open class ServerException(message: kotlin.String? = null, val statusCode: Int = -1, val response: Response? = null) : RuntimeException(message) {
+
+    companion object {
+        private const val serialVersionUID: Long = 456L
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/InstantAdapter.kt

@@ -0,0 +1,18 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import kotlinx.datetime.Instant
+
+class InstantAdapter {
+    @ToJson
+    fun toJson(value: Instant): String {
+        return value.toString()
+    }
+
+    @FromJson
+    fun fromJson(value: String): Instant {
+        return Instant.parse(value)
+    }
+
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/LocalDateAdapter.kt

@@ -0,0 +1,19 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
+
+class LocalDateAdapter {
+    @ToJson
+    fun toJson(value: LocalDate): String {
+        return DateTimeFormatter.ISO_LOCAL_DATE.format(value)
+    }
+
+    @FromJson
+    fun fromJson(value: String): LocalDate {
+        return LocalDate.parse(value, DateTimeFormatter.ISO_LOCAL_DATE)
+    }
+
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/LocalDateTimeAdapter.kt

@@ -0,0 +1,19 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+
+class LocalDateTimeAdapter {
+    @ToJson
+    fun toJson(value: LocalDateTime): String {
+        return DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(value)
+    }
+
+    @FromJson
+    fun fromJson(value: String): LocalDateTime {
+        return LocalDateTime.parse(value, DateTimeFormatter.ISO_LOCAL_DATE_TIME)
+    }
+
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/OffsetDateTimeAdapter.kt

@@ -0,0 +1,19 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.time.OffsetDateTime
+import java.time.format.DateTimeFormatter
+
+class OffsetDateTimeAdapter {
+    @ToJson
+    fun toJson(value: OffsetDateTime): String {
+        return DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(value)
+    }
+
+    @FromJson
+    fun fromJson(value: String): OffsetDateTime {
+        return OffsetDateTime.parse(value, DateTimeFormatter.ISO_OFFSET_DATE_TIME)
+    }
+
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/PartConfig.kt

@@ -0,0 +1,11 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Defines a config object for a given part of a multi-part request.
+ * NOTE: Headers is a Map<String,String> because rfc2616 defines
+ *       multi-valued headers as csv-only.
+ */
+data class PartConfig<T>(
+    val headers: MutableMap<String, String> = mutableMapOf(),
+    val body: T? = null
+)

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/RequestConfig.kt

@@ -0,0 +1,18 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Defines a config object for a given request.
+ * NOTE: This object doesn't include 'body' because it
+ *       allows for caching of the constructed object
+ *       for many request definitions.
+ * NOTE: Headers is a Map<String,String> because rfc2616 defines
+ *       multi-valued headers as csv-only.
+ */
+data class RequestConfig<T>(
+    val method: RequestMethod,
+    val path: String,
+    val headers: MutableMap<String, String> = mutableMapOf(),
+    val query: MutableMap<String, List<String>> = mutableMapOf(),
+    val requiresAuthentication: Boolean,
+    val body: T? = null
+)

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/RequestMethod.kt

@@ -0,0 +1,8 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Provides enumerated HTTP verbs
+ */
+enum class RequestMethod {
+    GET, DELETE, HEAD, OPTIONS, PATCH, POST, PUT
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/ResponseExtensions.kt

@@ -0,0 +1,24 @@
+package org.openapitools.client.infrastructure
+
+import okhttp3.Response
+
+/**
+ * Provides an extension to evaluation whether the response is a 1xx code
+ */
+val Response.isInformational : Boolean get() = this.code in 100..199
+
+/**
+ * Provides an extension to evaluation whether the response is a 3xx code
+ */
+@Suppress("EXTENSION_SHADOWED_BY_MEMBER")
+val Response.isRedirect : Boolean get() = this.code in 300..399
+
+/**
+ * Provides an extension to evaluation whether the response is a 4xx code
+ */
+val Response.isClientError : Boolean get() = this.code in 400..499
+
+/**
+ * Provides an extension to evaluation whether the response is a 5xx (Standard) through 999 (non-standard) code
+ */
+val Response.isServerError : Boolean get() = this.code in 500..999

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/Serializer.kt

@@ -0,0 +1,24 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
+
+object Serializer {
+    @JvmStatic
+    val moshiBuilder: Moshi.Builder = Moshi.Builder()
+        .add(OffsetDateTimeAdapter())
+        .add(InstantAdapter())
+        .add(LocalDateTimeAdapter())
+        .add(LocalDateAdapter())
+        .add(UUIDAdapter())
+        .add(ByteArrayAdapter())
+        .add(URIAdapter())
+        .add(KotlinJsonAdapterFactory())
+        .add(BigDecimalAdapter())
+        .add(BigIntegerAdapter())
+
+    @JvmStatic
+    val moshi: Moshi by lazy {
+        moshiBuilder.build()
+    }
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/URIAdapter.kt

@@ -0,0 +1,13 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.net.URI
+
+class URIAdapter {
+    @ToJson
+    fun toJson(uri: URI) = uri.toString()
+
+    @FromJson
+    fun fromJson(s: String): URI = URI.create(s)
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/infrastructure/UUIDAdapter.kt

@@ -0,0 +1,13 @@
+package org.openapitools.client.infrastructure
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import java.util.UUID
+
+class UUIDAdapter {
+    @ToJson
+    fun toJson(uuid: UUID) = uuid.toString()
+
+    @FromJson
+    fun fromJson(s: String): UUID = UUID.fromString(s)
+}

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/Category.kt

@@ -0,0 +1,39 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * A category for a pet
+ *
+ * @param id 
+ * @param name 
+ */
+
+
+data class Category (
+
+    @Json(name = "id")
+    val id: kotlin.Long? = null,
+
+    @Json(name = "name")
+    val name: kotlin.String? = null
+
+)
+

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/ModelApiResponse.kt

@@ -0,0 +1,43 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * Describes the result of uploading an image resource
+ *
+ * @param code 
+ * @param type 
+ * @param message 
+ */
+
+
+data class ModelApiResponse (
+
+    @Json(name = "code")
+    val code: kotlin.Int? = null,
+
+    @Json(name = "type")
+    val type: kotlin.String? = null,
+
+    @Json(name = "message")
+    val message: kotlin.String? = null
+
+)
+

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/Order.kt

@@ -0,0 +1,69 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * An order for a pets from the pet store
+ *
+ * @param id 
+ * @param petId 
+ * @param quantity 
+ * @param shipDate 
+ * @param status Order Status
+ * @param complete 
+ */
+
+
+data class Order (
+
+    @Json(name = "id")
+    val id: kotlin.Long? = null,
+
+    @Json(name = "petId")
+    val petId: kotlin.Long? = null,
+
+    @Json(name = "quantity")
+    val quantity: kotlin.Int? = null,
+
+    @Json(name = "shipDate")
+    val shipDate: kotlinx.datetime.Instant? = null,
+
+    /* Order Status */
+    @Json(name = "status")
+    val status: Order.Status? = null,
+
+    @Json(name = "complete")
+    val complete: kotlin.Boolean? = false
+
+) {
+
+    /**
+     * Order Status
+     *
+     * Values: placed,approved,delivered
+     */
+    @JsonClass(generateAdapter = false)
+    enum class Status(val value: kotlin.String) {
+        @Json(name = "placed") placed("placed"),
+        @Json(name = "approved") approved("approved"),
+        @Json(name = "delivered") delivered("delivered");
+    }
+}
+

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/Pet.kt

@@ -0,0 +1,71 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+import org.openapitools.client.models.Category
+import org.openapitools.client.models.Tag
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * A pet for sale in the pet store
+ *
+ * @param name 
+ * @param photoUrls 
+ * @param id 
+ * @param category 
+ * @param tags 
+ * @param status pet status in the store
+ */
+
+
+data class Pet (
+
+    @Json(name = "name")
+    val name: kotlin.String,
+
+    @Json(name = "photoUrls")
+    val photoUrls: kotlin.collections.List<kotlin.String>,
+
+    @Json(name = "id")
+    val id: kotlin.Long? = null,
+
+    @Json(name = "category")
+    val category: Category? = null,
+
+    @Json(name = "tags")
+    val tags: kotlin.collections.List<Tag>? = null,
+
+    /* pet status in the store */
+    @Json(name = "status")
+    val status: Pet.Status? = null
+
+) {
+
+    /**
+     * pet status in the store
+     *
+     * Values: available,pending,sold
+     */
+    @JsonClass(generateAdapter = false)
+    enum class Status(val value: kotlin.String) {
+        @Json(name = "available") available("available"),
+        @Json(name = "pending") pending("pending"),
+        @Json(name = "sold") sold("sold");
+    }
+}
+

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/Tag.kt

@@ -0,0 +1,39 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * A tag for a pet
+ *
+ * @param id 
+ * @param name 
+ */
+
+
+data class Tag (
+
+    @Json(name = "id")
+    val id: kotlin.Long? = null,
+
+    @Json(name = "name")
+    val name: kotlin.String? = null
+
+)
+

samples/client/petstore/kotlin-kotlinx-datetime/src/main/kotlin/org/openapitools/client/models/User.kt

@@ -0,0 +1,64 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * A User who is purchasing from the pet store
+ *
+ * @param id 
+ * @param username 
+ * @param firstName 
+ * @param lastName 
+ * @param email 
+ * @param password 
+ * @param phone 
+ * @param userStatus User Status
+ */
+
+
+data class User (
+
+    @Json(name = "id")
+    val id: kotlin.Long? = null,
+
+    @Json(name = "username")
+    val username: kotlin.String? = null,
+
+    @Json(name = "firstName")
+    val firstName: kotlin.String? = null,
+
+    @Json(name = "lastName")
+    val lastName: kotlin.String? = null,
+
+    @Json(name = "email")
+    val email: kotlin.String? = null,
+
+    @Json(name = "password")
+    val password: kotlin.String? = null,
+
+    @Json(name = "phone")
+    val phone: kotlin.String? = null,
+
+    /* User Status */
+    @Json(name = "userStatus")
+    val userStatus: kotlin.Int? = null
+
+)
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/.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

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/.openapi-generator/FILES

@@ -0,0 +1,43 @@
+README.md
+build.gradle.kts
+docs/ApiResponse.md
+docs/Category.md
+docs/Order.md
+docs/Pet.md
+docs/PetApi.md
+docs/StoreApi.md
+docs/Tag.md
+docs/User.md
+docs/UserApi.md
+gradle/wrapper/gradle-wrapper.jar
+gradle/wrapper/gradle-wrapper.properties
+gradlew
+gradlew.bat
+settings.gradle.kts
+src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt
+src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt
+src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt
+src/commonMain/kotlin/org/openapitools/client/auth/ApiKeyAuth.kt
+src/commonMain/kotlin/org/openapitools/client/auth/Authentication.kt
+src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt
+src/commonMain/kotlin/org/openapitools/client/auth/HttpBearerAuth.kt
+src/commonMain/kotlin/org/openapitools/client/auth/OAuth.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/Base64ByteArray.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/Bytes.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/HttpResponse.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/OctetByteArray.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/PartConfig.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/RequestConfig.kt
+src/commonMain/kotlin/org/openapitools/client/infrastructure/RequestMethod.kt
+src/commonMain/kotlin/org/openapitools/client/models/Category.kt
+src/commonMain/kotlin/org/openapitools/client/models/ModelApiResponse.kt
+src/commonMain/kotlin/org/openapitools/client/models/Order.kt
+src/commonMain/kotlin/org/openapitools/client/models/Pet.kt
+src/commonMain/kotlin/org/openapitools/client/models/Tag.kt
+src/commonMain/kotlin/org/openapitools/client/models/User.kt
+src/commonTest/kotlin/util/Coroutine.kt
+src/iosTest/kotlin/util/Coroutine.kt
+src/jsTest/kotlin/util/Coroutine.kt
+src/jvmTest/kotlin/util/Coroutine.kt

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.2.0-SNAPSHOT

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/README.md

@@ -0,0 +1,92 @@
+# org.openapitools.client - Kotlin client library for OpenAPI Petstore
+
+This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+
+## Overview
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [openapi-spec](https://github.com/OAI/OpenAPI-Specification) from a remote server, you can easily generate an API client.
+
+- API version: 1.0.0
+- Package version: 
+- Build package: org.openapitools.codegen.languages.KotlinClientCodegen
+
+## Requires
+
+* Kotlin 1.5.10
+
+## Build
+
+```
+./gradlew check assemble
+```
+
+This runs all tests and packages the library.
+
+## Features/Implementation Notes
+
+* Supports JSON inputs/outputs, File inputs, and Form inputs.
+* Supports collection formats for query parameters: csv, tsv, ssv, pipes.
+* Some Kotlin and Java types are fully qualified to avoid conflicts with types defined in OpenAPI definitions.
+
+
+<a id="documentation-for-api-endpoints"></a>
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*PetApi* | [**addPet**](docs/PetApi.md#addpet) | **POST** /pet | Add a new pet to the store
+*PetApi* | [**deletePet**](docs/PetApi.md#deletepet) | **DELETE** /pet/{petId} | Deletes a pet
+*PetApi* | [**findPetsByStatus**](docs/PetApi.md#findpetsbystatus) | **GET** /pet/findByStatus | Finds Pets by status
+*PetApi* | [**findPetsByTags**](docs/PetApi.md#findpetsbytags) | **GET** /pet/findByTags | Finds Pets by tags
+*PetApi* | [**getPetById**](docs/PetApi.md#getpetbyid) | **GET** /pet/{petId} | Find pet by ID
+*PetApi* | [**updatePet**](docs/PetApi.md#updatepet) | **PUT** /pet | Update an existing pet
+*PetApi* | [**updatePetWithForm**](docs/PetApi.md#updatepetwithform) | **POST** /pet/{petId} | Updates a pet in the store with form data
+*PetApi* | [**uploadFile**](docs/PetApi.md#uploadfile) | **POST** /pet/{petId}/uploadImage | uploads an image
+*StoreApi* | [**deleteOrder**](docs/StoreApi.md#deleteorder) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+*StoreApi* | [**getInventory**](docs/StoreApi.md#getinventory) | **GET** /store/inventory | Returns pet inventories by status
+*StoreApi* | [**getOrderById**](docs/StoreApi.md#getorderbyid) | **GET** /store/order/{orderId} | Find purchase order by ID
+*StoreApi* | [**placeOrder**](docs/StoreApi.md#placeorder) | **POST** /store/order | Place an order for a pet
+*UserApi* | [**createUser**](docs/UserApi.md#createuser) | **POST** /user | Create user
+*UserApi* | [**createUsersWithArrayInput**](docs/UserApi.md#createuserswitharrayinput) | **POST** /user/createWithArray | Creates list of users with given input array
+*UserApi* | [**createUsersWithListInput**](docs/UserApi.md#createuserswithlistinput) | **POST** /user/createWithList | Creates list of users with given input array
+*UserApi* | [**deleteUser**](docs/UserApi.md#deleteuser) | **DELETE** /user/{username} | Delete user
+*UserApi* | [**getUserByName**](docs/UserApi.md#getuserbyname) | **GET** /user/{username} | Get user by user name
+*UserApi* | [**loginUser**](docs/UserApi.md#loginuser) | **GET** /user/login | Logs user into the system
+*UserApi* | [**logoutUser**](docs/UserApi.md#logoutuser) | **GET** /user/logout | Logs out current logged in user session
+*UserApi* | [**updateUser**](docs/UserApi.md#updateuser) | **PUT** /user/{username} | Updated user
+
+
+<a id="documentation-for-models"></a>
+## Documentation for Models
+
+ - [org.openapitools.client.models.Category](docs/Category.md)
+ - [org.openapitools.client.models.ModelApiResponse](docs/ModelApiResponse.md)
+ - [org.openapitools.client.models.Order](docs/Order.md)
+ - [org.openapitools.client.models.Pet](docs/Pet.md)
+ - [org.openapitools.client.models.Tag](docs/Tag.md)
+ - [org.openapitools.client.models.User](docs/User.md)
+
+
+<a id="documentation-for-authorization"></a>
+## Documentation for Authorization
+
+
+Authentication schemes defined for the API:
+<a id="petstore_auth"></a>
+### petstore_auth
+
+- **Type**: OAuth
+- **Flow**: implicit
+- **Authorization URL**: http://petstore.swagger.io/api/oauth/dialog
+- **Scopes**: 
+  - write:pets: modify pets in your account
+  - read:pets: read your pets
+
+<a id="api_key"></a>
+### api_key
+
+- **Type**: API key
+- **API key parameter name**: api_key
+- **Location**: HTTP header
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/build.gradle.kts

@@ -0,0 +1,108 @@
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+
+plugins {
+    kotlin("multiplatform") version "1.7.21" // kotlin_version
+    kotlin("plugin.serialization") version "1.7.21" // kotlin_version
+}
+
+group = "org.openapitools"
+version = "1.0.0"
+
+val kotlin_version = "1.7.21"
+val coroutines_version = "1.6.4"
+val serialization_version = "1.3.3"
+val ktor_version = "2.2.3"
+
+repositories {
+    mavenCentral()
+}
+
+kotlin {
+    jvm()
+    ios { binaries { framework { freeCompilerArgs += "-Xobjc-generics" } } }
+    iosSimulatorArm64 { binaries { framework { freeCompilerArgs += "-Xobjc-generics" } } }
+    js {
+        browser()
+        nodejs()
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version")
+                implementation("org.jetbrains.kotlinx:kotlinx-serialization-core:$serialization_version")
+
+                api("io.ktor:ktor-client-core:$ktor_version")
+                api("io.ktor:ktor-client-serialization:$ktor_version")
+                api("io.ktor:ktor-client-content-negotiation:$ktor_version")
+                api("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")
+
+                api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
+            }
+        }
+
+        val commonTest by getting {
+            dependencies {
+                implementation(kotlin("test"))
+                implementation("io.ktor:ktor-client-mock:$ktor_version")
+            }
+        }
+
+        val jvmMain by getting {
+            dependencies {
+                implementation(kotlin("stdlib-jdk7"))
+                implementation("io.ktor:ktor-client-cio-jvm:$ktor_version")
+            }
+        }
+
+        val jvmTest by getting {
+            dependencies {
+                implementation(kotlin("test-junit"))
+            }
+        }
+
+        val iosMain by getting {
+            dependencies {
+                api("io.ktor:ktor-client-ios:$ktor_version")
+            }
+        }
+
+        val iosTest by getting
+
+        val iosSimulatorArm64Main by getting
+
+        val iosSimulatorArm64Test by getting
+
+        val jsMain by getting {
+            dependencies {
+                api("io.ktor:ktor-client-js:$ktor_version")
+            }
+        }
+
+        val jsTest by getting
+
+        all {
+            languageSettings.apply {
+                optIn("kotlin.Experimental")
+            }
+        }
+    }
+}
+
+tasks {
+    register("iosTest") {
+        val device = project.findProperty("device")?.toString() ?: "iPhone 8"
+        dependsOn("linkDebugTestIosX64")
+        group = JavaBasePlugin.VERIFICATION_GROUP
+        description = "Execute unit tests on ${device} simulator"
+        doLast {
+            val binary = kotlin.targets.getByName<KotlinNativeTarget>("iosX64").binaries.getTest("DEBUG")
+            exec {
+                commandLine("xcrun", "simctl", "spawn", device, binary.outputFile)
+            }
+        }
+    }
+    register("test") {
+        dependsOn("allTests")
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/ApiResponse.md

@@ -0,0 +1,12 @@
+
+# ModelApiResponse
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**code** | **kotlin.Int** |  |  [optional]
+**type** | **kotlin.String** |  |  [optional]
+**message** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/Category.md

@@ -0,0 +1,11 @@
+
+# Category
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**name** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/Order.md

@@ -0,0 +1,22 @@
+
+# Order
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**petId** | **kotlin.Long** |  |  [optional]
+**quantity** | **kotlin.Int** |  |  [optional]
+**shipDate** | [**kotlinx.datetime.Instant**](kotlinx.datetime.Instant.md) |  |  [optional]
+**status** | [**inline**](#Status) | Order Status |  [optional]
+**complete** | **kotlin.Boolean** |  |  [optional]
+
+
+<a id="Status"></a>
+## Enum: status
+Name | Value
+---- | -----
+status | placed, approved, delivered
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/Pet.md

@@ -0,0 +1,22 @@
+
+# Pet
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**name** | **kotlin.String** |  | 
+**photoUrls** | **kotlin.collections.List<kotlin.String>** |  | 
+**id** | **kotlin.Long** |  |  [optional]
+**category** | [**Category**](Category.md) |  |  [optional]
+**tags** | [**kotlin.collections.List<Tag>**](Tag.md) |  |  [optional]
+**status** | [**inline**](#Status) | pet status in the store |  [optional]
+
+
+<a id="Status"></a>
+## Enum: status
+Name | Value
+---- | -----
+status | available, pending, sold
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/PetApi.md

@@ -0,0 +1,405 @@
+# PetApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**addPet**](PetApi.md#addPet) | **POST** /pet | Add a new pet to the store
+[**deletePet**](PetApi.md#deletePet) | **DELETE** /pet/{petId} | Deletes a pet
+[**findPetsByStatus**](PetApi.md#findPetsByStatus) | **GET** /pet/findByStatus | Finds Pets by status
+[**findPetsByTags**](PetApi.md#findPetsByTags) | **GET** /pet/findByTags | Finds Pets by tags
+[**getPetById**](PetApi.md#getPetById) | **GET** /pet/{petId} | Find pet by ID
+[**updatePet**](PetApi.md#updatePet) | **PUT** /pet | Update an existing pet
+[**updatePetWithForm**](PetApi.md#updatePetWithForm) | **POST** /pet/{petId} | Updates a pet in the store with form data
+[**uploadFile**](PetApi.md#uploadFile) | **POST** /pet/{petId}/uploadImage | uploads an image
+
+
+<a id="addPet"></a>
+# **addPet**
+> addPet(body)
+
+Add a new pet to the store
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val body : Pet =  // Pet | Pet object that needs to be added to the store
+try {
+    apiInstance.addPet(body)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#addPet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#addPet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/json, application/xml
+ - **Accept**: Not defined
+
+<a id="deletePet"></a>
+# **deletePet**
+> deletePet(petId, apiKey)
+
+Deletes a pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | Pet id to delete
+val apiKey : kotlin.String = apiKey_example // kotlin.String | 
+try {
+    apiInstance.deletePet(petId, apiKey)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#deletePet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#deletePet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| Pet id to delete |
+ **apiKey** | **kotlin.String**|  | [optional]
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="findPetsByStatus"></a>
+# **findPetsByStatus**
+> kotlin.collections.List&lt;Pet&gt; findPetsByStatus(status)
+
+Finds Pets by status
+
+Multiple status values can be provided with comma separated strings
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val status : kotlin.collections.List<kotlin.String> =  // kotlin.collections.List<kotlin.String> | Status values that need to be considered for filter
+try {
+    val result : kotlin.collections.List<Pet> = apiInstance.findPetsByStatus(status)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#findPetsByStatus")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#findPetsByStatus")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **status** | [**kotlin.collections.List&lt;kotlin.String&gt;**](kotlin.String.md)| Status values that need to be considered for filter | [enum: available, pending, sold]
+
+### Return type
+
+[**kotlin.collections.List&lt;Pet&gt;**](Pet.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="findPetsByTags"></a>
+# **findPetsByTags**
+> kotlin.collections.List&lt;Pet&gt; findPetsByTags(tags)
+
+Finds Pets by tags
+
+Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val tags : kotlin.collections.List<kotlin.String> =  // kotlin.collections.List<kotlin.String> | Tags to filter by
+try {
+    val result : kotlin.collections.List<Pet> = apiInstance.findPetsByTags(tags)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#findPetsByTags")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#findPetsByTags")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **tags** | [**kotlin.collections.List&lt;kotlin.String&gt;**](kotlin.String.md)| Tags to filter by |
+
+### Return type
+
+[**kotlin.collections.List&lt;Pet&gt;**](Pet.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="getPetById"></a>
+# **getPetById**
+> Pet getPetById(petId)
+
+Find pet by ID
+
+Returns a single pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet to return
+try {
+    val result : Pet = apiInstance.getPetById(petId)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#getPetById")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#getPetById")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet to return |
+
+### Return type
+
+[**Pet**](Pet.md)
+
+### Authorization
+
+
+Configure api_key:
+    ApiClient.apiKey["api_key"] = ""
+    ApiClient.apiKeyPrefix["api_key"] = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="updatePet"></a>
+# **updatePet**
+> updatePet(body)
+
+Update an existing pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val body : Pet =  // Pet | Pet object that needs to be added to the store
+try {
+    apiInstance.updatePet(body)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#updatePet")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#updatePet")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/json, application/xml
+ - **Accept**: Not defined
+
+<a id="updatePetWithForm"></a>
+# **updatePetWithForm**
+> updatePetWithForm(petId, name, status)
+
+Updates a pet in the store with form data
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet that needs to be updated
+val name : kotlin.String = name_example // kotlin.String | Updated name of the pet
+val status : kotlin.String = status_example // kotlin.String | Updated status of the pet
+try {
+    apiInstance.updatePetWithForm(petId, name, status)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#updatePetWithForm")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#updatePetWithForm")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet that needs to be updated |
+ **name** | **kotlin.String**| Updated name of the pet | [optional]
+ **status** | **kotlin.String**| Updated status of the pet | [optional]
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: application/x-www-form-urlencoded
+ - **Accept**: Not defined
+
+<a id="uploadFile"></a>
+# **uploadFile**
+> ModelApiResponse uploadFile(petId, additionalMetadata, file)
+
+uploads an image
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PetApi()
+val petId : kotlin.Long = 789 // kotlin.Long | ID of pet to update
+val additionalMetadata : kotlin.String = additionalMetadata_example // kotlin.String | Additional data to pass to server
+val file : io.ktor.client.request.forms.InputProvider = BINARY_DATA_HERE // io.ktor.client.request.forms.InputProvider | file to upload
+try {
+    val result : ModelApiResponse = apiInstance.uploadFile(petId, additionalMetadata, file)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PetApi#uploadFile")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PetApi#uploadFile")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **petId** | **kotlin.Long**| ID of pet to update |
+ **additionalMetadata** | **kotlin.String**| Additional data to pass to server | [optional]
+ **file** | **io.ktor.client.request.forms.InputProvider**| file to upload | [optional]
+
+### Return type
+
+[**ModelApiResponse**](ModelApiResponse.md)
+
+### Authorization
+
+
+Configure petstore_auth:
+    ApiClient.accessToken = ""
+
+### HTTP request headers
+
+ - **Content-Type**: multipart/form-data
+ - **Accept**: application/json
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/StoreApi.md

@@ -0,0 +1,196 @@
+# StoreApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**deleteOrder**](StoreApi.md#deleteOrder) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+[**getInventory**](StoreApi.md#getInventory) | **GET** /store/inventory | Returns pet inventories by status
+[**getOrderById**](StoreApi.md#getOrderById) | **GET** /store/order/{orderId} | Find purchase order by ID
+[**placeOrder**](StoreApi.md#placeOrder) | **POST** /store/order | Place an order for a pet
+
+
+<a id="deleteOrder"></a>
+# **deleteOrder**
+> deleteOrder(orderId)
+
+Delete purchase order by ID
+
+For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val orderId : kotlin.String = orderId_example // kotlin.String | ID of the order that needs to be deleted
+try {
+    apiInstance.deleteOrder(orderId)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#deleteOrder")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#deleteOrder")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **orderId** | **kotlin.String**| ID of the order that needs to be deleted |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="getInventory"></a>
+# **getInventory**
+> kotlin.collections.Map&lt;kotlin.String, kotlin.Int&gt; getInventory()
+
+Returns pet inventories by status
+
+Returns a map of status codes to quantities
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+try {
+    val result : kotlin.collections.Map<kotlin.String, kotlin.Int> = apiInstance.getInventory()
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#getInventory")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#getInventory")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+**kotlin.collections.Map&lt;kotlin.String, kotlin.Int&gt;**
+
+### Authorization
+
+
+Configure api_key:
+    ApiClient.apiKey["api_key"] = ""
+    ApiClient.apiKeyPrefix["api_key"] = ""
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+<a id="getOrderById"></a>
+# **getOrderById**
+> Order getOrderById(orderId)
+
+Find purchase order by ID
+
+For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val orderId : kotlin.Long = 789 // kotlin.Long | ID of pet that needs to be fetched
+try {
+    val result : Order = apiInstance.getOrderById(orderId)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#getOrderById")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#getOrderById")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **orderId** | **kotlin.Long**| ID of pet that needs to be fetched |
+
+### Return type
+
+[**Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="placeOrder"></a>
+# **placeOrder**
+> Order placeOrder(body)
+
+Place an order for a pet
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = StoreApi()
+val body : Order =  // Order | order placed for purchasing the pet
+try {
+    val result : Order = apiInstance.placeOrder(body)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling StoreApi#placeOrder")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling StoreApi#placeOrder")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**Order**](Order.md)| order placed for purchasing the pet |
+
+### Return type
+
+[**Order**](Order.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/Tag.md

@@ -0,0 +1,11 @@
+
+# Tag
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**name** | **kotlin.String** |  |  [optional]
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/User.md

@@ -0,0 +1,17 @@
+
+# User
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**id** | **kotlin.Long** |  |  [optional]
+**username** | **kotlin.String** |  |  [optional]
+**firstName** | **kotlin.String** |  |  [optional]
+**lastName** | **kotlin.String** |  |  [optional]
+**email** | **kotlin.String** |  |  [optional]
+**password** | **kotlin.String** |  |  [optional]
+**phone** | **kotlin.String** |  |  [optional]
+**userStatus** | **kotlin.Int** | User Status |  [optional]
+
+
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/docs/UserApi.md

@@ -0,0 +1,376 @@
+# UserApi
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**createUser**](UserApi.md#createUser) | **POST** /user | Create user
+[**createUsersWithArrayInput**](UserApi.md#createUsersWithArrayInput) | **POST** /user/createWithArray | Creates list of users with given input array
+[**createUsersWithListInput**](UserApi.md#createUsersWithListInput) | **POST** /user/createWithList | Creates list of users with given input array
+[**deleteUser**](UserApi.md#deleteUser) | **DELETE** /user/{username} | Delete user
+[**getUserByName**](UserApi.md#getUserByName) | **GET** /user/{username} | Get user by user name
+[**loginUser**](UserApi.md#loginUser) | **GET** /user/login | Logs user into the system
+[**logoutUser**](UserApi.md#logoutUser) | **GET** /user/logout | Logs out current logged in user session
+[**updateUser**](UserApi.md#updateUser) | **PUT** /user/{username} | Updated user
+
+
+<a id="createUser"></a>
+# **createUser**
+> createUser(body)
+
+Create user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : User =  // User | Created user object
+try {
+    apiInstance.createUser(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**User**](User.md)| Created user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="createUsersWithArrayInput"></a>
+# **createUsersWithArrayInput**
+> createUsersWithArrayInput(body)
+
+Creates list of users with given input array
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : kotlin.collections.List<User> =  // kotlin.collections.List<User> | List of user object
+try {
+    apiInstance.createUsersWithArrayInput(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUsersWithArrayInput")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUsersWithArrayInput")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**kotlin.collections.List&lt;User&gt;**](User.md)| List of user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="createUsersWithListInput"></a>
+# **createUsersWithListInput**
+> createUsersWithListInput(body)
+
+Creates list of users with given input array
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val body : kotlin.collections.List<User> =  // kotlin.collections.List<User> | List of user object
+try {
+    apiInstance.createUsersWithListInput(body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#createUsersWithListInput")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#createUsersWithListInput")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**kotlin.collections.List&lt;User&gt;**](User.md)| List of user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="deleteUser"></a>
+# **deleteUser**
+> deleteUser(username)
+
+Delete user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The name that needs to be deleted
+try {
+    apiInstance.deleteUser(username)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#deleteUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#deleteUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The name that needs to be deleted |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="getUserByName"></a>
+# **getUserByName**
+> User getUserByName(username)
+
+Get user by user name
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The name that needs to be fetched. Use user1 for testing.
+try {
+    val result : User = apiInstance.getUserByName(username)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#getUserByName")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#getUserByName")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The name that needs to be fetched. Use user1 for testing. |
+
+### Return type
+
+[**User**](User.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="loginUser"></a>
+# **loginUser**
+> kotlin.String loginUser(username, password)
+
+Logs user into the system
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | The user name for login
+val password : kotlin.String = password_example // kotlin.String | The password for login in clear text
+try {
+    val result : kotlin.String = apiInstance.loginUser(username, password)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#loginUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#loginUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| The user name for login |
+ **password** | **kotlin.String**| The password for login in clear text |
+
+### Return type
+
+**kotlin.String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/xml, application/json
+
+<a id="logoutUser"></a>
+# **logoutUser**
+> logoutUser()
+
+Logs out current logged in user session
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+try {
+    apiInstance.logoutUser()
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#logoutUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#logoutUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+
+<a id="updateUser"></a>
+# **updateUser**
+> updateUser(username, body)
+
+Updated user
+
+This can only be done by the logged in user.
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = UserApi()
+val username : kotlin.String = username_example // kotlin.String | name that need to be deleted
+val body : User =  // User | Updated user object
+try {
+    apiInstance.updateUser(username, body)
+} catch (e: ClientException) {
+    println("4xx response calling UserApi#updateUser")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling UserApi#updateUser")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **username** | **kotlin.String**| name that need to be deleted |
+ **body** | [**User**](User.md)| Updated user object |
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: Not defined
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-all.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/gradlew

@@ -0,0 +1,245 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/settings.gradle.kts

@@ -0,0 +1 @@
+rootProject.name = "kotlin-client-petstore-multiplatform-kotlinx-datetime"

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/apis/PetApi.kt

@@ -0,0 +1,358 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import org.openapitools.client.models.ModelApiResponse
+import org.openapitools.client.models.Pet
+
+import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.request.forms.formData
+import io.ktor.client.engine.HttpClientEngine
+import kotlinx.serialization.json.Json
+import io.ktor.http.ParametersBuilder
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+open class PetApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
+
+    /**
+     * Add a new pet to the store
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return void
+     */
+    open suspend fun addPet(body: Pet): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = body
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/pet",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete
+     * @param apiKey  (optional)
+     * @return void
+     */
+    open suspend fun deletePet(petId: kotlin.Long, apiKey: kotlin.String? = null): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+        apiKey?.apply { localVariableHeaders["api_key"] = this.toString() }
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.DELETE,
+            "/pet/{petId}".replace("{" + "petId" + "}", "$petId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+    /**
+     * enum for parameter status
+     */
+    @Serializable
+    enum class StatusFindPetsByStatus(val value: kotlin.String) {
+        
+        @SerialName(value = "available")
+        available("available"),
+        
+        @SerialName(value = "pending")
+        pending("pending"),
+        
+        @SerialName(value = "sold")
+        sold("sold")
+        
+    }
+
+    /**
+     * Finds Pets by status
+     * Multiple status values can be provided with comma separated strings
+     * @param status Status values that need to be considered for filter
+     * @return kotlin.collections.List<Pet>
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun findPetsByStatus(status: kotlin.collections.List<StatusFindPetsByStatus>): HttpResponse<kotlin.collections.List<Pet>> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        status?.apply { localVariableQuery["status"] = toMultiValue(this, "csv") }
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/pet/findByStatus",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap<FindPetsByStatusResponse>().map { value }
+    }
+
+    @Serializable
+    private class FindPetsByStatusResponse(val value: List<Pet>) {
+        @Serializer(FindPetsByStatusResponse::class)
+        companion object : KSerializer<FindPetsByStatusResponse> {
+            private val serializer: KSerializer<List<Pet>> = serializer<List<Pet>>()
+            override val descriptor = serializer.descriptor
+            override fun serialize(encoder: Encoder, obj: FindPetsByStatusResponse) = serializer.serialize(encoder, obj.value)
+            override fun deserialize(decoder: Decoder) = FindPetsByStatusResponse(serializer.deserialize(decoder))
+        }
+    }
+
+    /**
+     * Finds Pets by tags
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     * @param tags Tags to filter by
+     * @return kotlin.collections.List<Pet>
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun findPetsByTags(tags: kotlin.collections.List<kotlin.String>): HttpResponse<kotlin.collections.List<Pet>> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        tags?.apply { localVariableQuery["tags"] = toMultiValue(this, "csv") }
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/pet/findByTags",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap<FindPetsByTagsResponse>().map { value }
+    }
+
+    @Serializable
+    private class FindPetsByTagsResponse(val value: List<Pet>) {
+        @Serializer(FindPetsByTagsResponse::class)
+        companion object : KSerializer<FindPetsByTagsResponse> {
+            private val serializer: KSerializer<List<Pet>> = serializer<List<Pet>>()
+            override val descriptor = serializer.descriptor
+            override fun serialize(encoder: Encoder, obj: FindPetsByTagsResponse) = serializer.serialize(encoder, obj.value)
+            override fun deserialize(decoder: Decoder) = FindPetsByTagsResponse(serializer.deserialize(decoder))
+        }
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return
+     * @return Pet
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun getPetById(petId: kotlin.Long): HttpResponse<Pet> {
+
+        val localVariableAuthNames = listOf<String>("api_key")
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/pet/{petId}".replace("{" + "petId" + "}", "$petId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Update an existing pet
+     * 
+     * @param body Pet object that needs to be added to the store
+     * @return void
+     */
+    open suspend fun updatePet(body: Pet): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = body
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.PUT,
+            "/pet",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+    /**
+     * Updates a pet in the store with form data
+     * 
+     * @param petId ID of pet that needs to be updated
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     * @return void
+     */
+    open suspend fun updatePetWithForm(petId: kotlin.Long, name: kotlin.String? = null, status: kotlin.String? = null): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = 
+            ParametersBuilder().also {
+                name?.apply { it.append("name", name.toString()) }
+                status?.apply { it.append("status", status.toString()) }
+            }.build()
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/pet/{petId}".replace("{" + "petId" + "}", "$petId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return urlEncodedFormRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * uploads an image
+     * 
+     * @param petId ID of pet to update
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @return ModelApiResponse
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String? = null, file: io.ktor.client.request.forms.InputProvider? = null): HttpResponse<ModelApiResponse> {
+
+        val localVariableAuthNames = listOf<String>("petstore_auth")
+
+        val localVariableBody = 
+            formData {
+                additionalMetadata?.apply { append("additionalMetadata", additionalMetadata) }
+                file?.apply { append("file", file) }
+            }
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/pet/{petId}/uploadImage".replace("{" + "petId" + "}", "$petId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return multipartFormRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/apis/StoreApi.kt

@@ -0,0 +1,185 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import org.openapitools.client.models.Order
+
+import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.request.forms.formData
+import io.ktor.client.engine.HttpClientEngine
+import kotlinx.serialization.json.Json
+import io.ktor.http.ParametersBuilder
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+open class StoreApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
+
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted
+     * @return void
+     */
+    open suspend fun deleteOrder(orderId: kotlin.String): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.DELETE,
+            "/store/order/{orderId}".replace("{" + "orderId" + "}", "$orderId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     * @return kotlin.collections.Map<kotlin.String, kotlin.Int>
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun getInventory(): HttpResponse<kotlin.collections.Map<kotlin.String, kotlin.Int>> {
+
+        val localVariableAuthNames = listOf<String>("api_key")
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/store/inventory",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = true,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap<GetInventoryResponse>().map { value }
+    }
+
+    @Serializable
+    private class GetInventoryResponse(val value: Map<kotlin.String, kotlin.Int>) {
+        @Serializer(GetInventoryResponse::class)
+        companion object : KSerializer<GetInventoryResponse> {
+            private val serializer: KSerializer<Map<kotlin.String, kotlin.Int>> = serializer<Map<String, kotlin.Int>>()
+            override val descriptor = serializer.descriptor
+            override fun serialize(encoder: Encoder, obj: GetInventoryResponse) = serializer.serialize(encoder, obj.value)
+            override fun deserialize(decoder: Decoder) = GetInventoryResponse(serializer.deserialize(decoder))
+        }
+    }
+
+    /**
+     * Find purchase order by ID
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+     * @param orderId ID of pet that needs to be fetched
+     * @return Order
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun getOrderById(orderId: kotlin.Long): HttpResponse<Order> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/store/order/{orderId}".replace("{" + "orderId" + "}", "$orderId"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param body order placed for purchasing the pet
+     * @return Order
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun placeOrder(body: Order): HttpResponse<Order> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = body
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/store/order",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/apis/UserApi.kt

@@ -0,0 +1,324 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.apis
+
+import org.openapitools.client.models.User
+
+import org.openapitools.client.infrastructure.*
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.request.forms.formData
+import io.ktor.client.engine.HttpClientEngine
+import kotlinx.serialization.json.Json
+import io.ktor.http.ParametersBuilder
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+open class UserApi : ApiClient {
+
+    constructor(
+        baseUrl: String = ApiClient.BASE_URL,
+        httpClientEngine: HttpClientEngine? = null,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonSerializer: Json = ApiClient.JSON_DEFAULT
+    ) : super(baseUrl = baseUrl, httpClientEngine = httpClientEngine, httpClientConfig = httpClientConfig, jsonBlock = jsonSerializer)
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): super(baseUrl = baseUrl, httpClient = httpClient)
+
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param body Created user object
+     * @return void
+     */
+    open suspend fun createUser(body: User): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = body
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/user",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return void
+     */
+    open suspend fun createUsersWithArrayInput(body: kotlin.collections.List<User>): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = CreateUsersWithArrayInputRequest(body)
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/user/createWithArray",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+    @Serializable
+    private class CreateUsersWithArrayInputRequest(val value: List<User>) {
+        @Serializer(CreateUsersWithArrayInputRequest::class)
+        companion object : KSerializer<CreateUsersWithArrayInputRequest> {
+            private val serializer: KSerializer<List<User>> = serializer<List<User>>()
+            override val descriptor = serializer.descriptor
+            override fun serialize(encoder: Encoder, obj: CreateUsersWithArrayInputRequest) = serializer.serialize(encoder, obj.value)
+            override fun deserialize(decoder: Decoder) = CreateUsersWithArrayInputRequest(serializer.deserialize(decoder))
+        }
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object
+     * @return void
+     */
+    open suspend fun createUsersWithListInput(body: kotlin.collections.List<User>): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = CreateUsersWithListInputRequest(body)
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.POST,
+            "/user/createWithList",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+    @Serializable
+    private class CreateUsersWithListInputRequest(val value: List<User>) {
+        @Serializer(CreateUsersWithListInputRequest::class)
+        companion object : KSerializer<CreateUsersWithListInputRequest> {
+            private val serializer: KSerializer<List<User>> = serializer<List<User>>()
+            override val descriptor = serializer.descriptor
+            override fun serialize(encoder: Encoder, obj: CreateUsersWithListInputRequest) = serializer.serialize(encoder, obj.value)
+            override fun deserialize(decoder: Decoder) = CreateUsersWithListInputRequest(serializer.deserialize(decoder))
+        }
+    }
+
+    /**
+     * Delete user
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted
+     * @return void
+     */
+    open suspend fun deleteUser(username: kotlin.String): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.DELETE,
+            "/user/{username}".replace("{" + "username" + "}", "$username"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.
+     * @return User
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun getUserByName(username: kotlin.String): HttpResponse<User> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/user/{username}".replace("{" + "username" + "}", "$username"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Logs user into the system
+     * 
+     * @param username The user name for login
+     * @param password The password for login in clear text
+     * @return kotlin.String
+     */
+    @Suppress("UNCHECKED_CAST")
+    open suspend fun loginUser(username: kotlin.String, password: kotlin.String): HttpResponse<kotlin.String> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        username?.apply { localVariableQuery["username"] = listOf("$username") }
+        password?.apply { localVariableQuery["password"] = listOf("$password") }
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/user/login",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Logs out current logged in user session
+     * 
+     * @return void
+     */
+    open suspend fun logoutUser(): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = 
+            io.ktor.client.utils.EmptyContent
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.GET,
+            "/user/logout",
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return request(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+    /**
+     * Updated user
+     * This can only be done by the logged in user.
+     * @param username name that need to be deleted
+     * @param body Updated user object
+     * @return void
+     */
+    open suspend fun updateUser(username: kotlin.String, body: User): HttpResponse<Unit> {
+
+        val localVariableAuthNames = listOf<String>()
+
+        val localVariableBody = body
+
+        val localVariableQuery = mutableMapOf<String, List<String>>()
+        val localVariableHeaders = mutableMapOf<String, String>()
+
+        val localVariableConfig = RequestConfig<kotlin.Any?>(
+            RequestMethod.PUT,
+            "/user/{username}".replace("{" + "username" + "}", "$username"),
+            query = localVariableQuery,
+            headers = localVariableHeaders,
+            requiresAuthentication = false,
+        )
+
+        return jsonRequest(
+            localVariableConfig,
+            localVariableBody,
+            localVariableAuthNames
+        ).wrap()
+    }
+
+
+
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/ApiKeyAuth.kt

@@ -0,0 +1,16 @@
+package org.openapitools.client.auth
+
+class ApiKeyAuth(private val location: String, val paramName: String) : Authentication {
+    var apiKey: String? = null
+    var apiKeyPrefix: String? = null
+
+    override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
+        val key: String = apiKey ?: return
+        val prefix: String? = apiKeyPrefix
+        val value: String = if (prefix != null) "$prefix $key" else key
+        when (location) {
+            "query" -> query[paramName] = listOf(value)
+            "header" -> headers[paramName] = value
+        }
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/Authentication.kt

@@ -0,0 +1,13 @@
+package org.openapitools.client.auth
+
+interface Authentication {
+
+    /**
+     * Apply authentication settings to header and query params.
+     *
+     * @param query Query parameters.
+     * @param headers Header parameters.
+     */
+    fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>)
+
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/HttpBasicAuth.kt

@@ -0,0 +1,17 @@
+package org.openapitools.client.auth
+
+import io.ktor.util.InternalAPI
+import io.ktor.util.encodeBase64
+
+class HttpBasicAuth : Authentication {
+    var username: String? = null
+    var password: String? = null
+
+    @OptIn(InternalAPI::class)
+    override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
+        if (username == null && password == null) return
+        val str = (username ?: "") + ":" + (password ?: "")
+        val auth = str.encodeBase64()
+        headers["Authorization"] = "Basic $auth"
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/HttpBearerAuth.kt

@@ -0,0 +1,14 @@
+package org.openapitools.client.auth
+
+class HttpBearerAuth(private val scheme: String?) : Authentication {
+    var bearerToken: String? = null
+
+    override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
+        val token: String = bearerToken ?: return
+        headers["Authorization"] = (if (scheme != null) upperCaseBearer(scheme)!! + " " else "") + token
+    }
+
+    private fun upperCaseBearer(scheme: String): String? {
+        return if ("bearer".equals(scheme, ignoreCase = true)) "Bearer" else scheme
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/auth/OAuth.kt

@@ -0,0 +1,10 @@
+package org.openapitools.client.auth
+
+class OAuth : Authentication {
+    var accessToken: String? = null
+
+    override fun apply(query: MutableMap<String, List<String>>, headers: MutableMap<String, String>) {
+        val token: String = accessToken ?: return
+        headers["Authorization"] = "Bearer $token"
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt

@@ -0,0 +1,23 @@
+package org.openapitools.client.infrastructure
+
+typealias MultiValueMap = MutableMap<String,List<String>>
+
+fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
+    "csv" -> ","
+    "tsv" -> "\t"
+    "pipe" -> "|"
+    "space" -> " "
+    else -> ""
+}
+
+val defaultMultiValueConverter: (item: Any?) -> String = { item -> "$item" }
+
+fun <T : Any?> toMultiValue(items: Array<T>, collectionFormat: String, map: (item: T) -> String = defaultMultiValueConverter)
+        = toMultiValue(items.asIterable(), collectionFormat, map)
+
+fun <T : Any?> toMultiValue(items: Iterable<T>, collectionFormat: String, map: (item: T) -> String = defaultMultiValueConverter): List<String> {
+    return when(collectionFormat) {
+        "multi" -> items.map(map)
+        else -> listOf(items.joinToString(separator = collectionDelimiter(collectionFormat), transform = map))
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiClient.kt

@@ -0,0 +1,192 @@
+package org.openapitools.client.infrastructure
+
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.engine.HttpClientEngine
+import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.client.request.*
+import io.ktor.client.request.forms.FormDataContent
+import io.ktor.client.request.forms.MultiPartFormDataContent
+import io.ktor.client.request.header
+import io.ktor.client.request.parameter
+import io.ktor.client.statement.HttpResponse
+import io.ktor.http.ContentType
+import io.ktor.serialization.kotlinx.json.json
+import io.ktor.http.*
+import io.ktor.http.content.PartData
+import io.ktor.http.contentType
+import kotlin.Unit
+import kotlinx.serialization.json.Json
+
+import org.openapitools.client.auth.*
+
+open class ApiClient(
+        private val baseUrl: String
+) {
+
+    private lateinit var client: HttpClient
+
+    constructor(
+        baseUrl: String,
+        httpClientEngine: HttpClientEngine?,
+        httpClientConfig: ((HttpClientConfig<*>) -> Unit)? = null,
+        jsonBlock: Json,
+    ) : this(baseUrl = baseUrl) {
+        val clientConfig: (HttpClientConfig<*>) -> Unit by lazy {
+            {
+                it.install(ContentNegotiation) { json(jsonBlock) }
+                httpClientConfig?.invoke(it)
+            }
+        }
+
+        client = httpClientEngine?.let { HttpClient(it, clientConfig) } ?: HttpClient(clientConfig)
+    }
+
+    constructor(
+        baseUrl: String,
+        httpClient: HttpClient
+    ): this(baseUrl = baseUrl) {
+        this.client = httpClient
+    }
+
+    private val authentications: kotlin.collections.Map<String, Authentication> by lazy {
+        mapOf(
+                "petstore_auth" to OAuth(), 
+                "api_key" to ApiKeyAuth("header", "api_key"))
+    }
+
+    companion object {
+        const val BASE_URL = "http://petstore.swagger.io/v2"
+        val JSON_DEFAULT = Json {
+          ignoreUnknownKeys = true
+          prettyPrint = true
+          isLenient = true
+        }
+        protected val UNSAFE_HEADERS = listOf(HttpHeaders.ContentType)
+    }
+
+    /**
+     * Set the username for the first HTTP basic authentication.
+     *
+     * @param username Username
+     */
+    fun setUsername(username: String) {
+        val auth = authentications?.values?.firstOrNull { it is HttpBasicAuth } as HttpBasicAuth?
+                ?: throw Exception("No HTTP basic authentication configured")
+        auth.username = username
+    }
+
+    /**
+     * Set the password for the first HTTP basic authentication.
+     *
+     * @param password Password
+     */
+    fun setPassword(password: String) {
+        val auth = authentications?.values?.firstOrNull { it is HttpBasicAuth } as HttpBasicAuth?
+                ?: throw Exception("No HTTP basic authentication configured")
+        auth.password = password
+    }
+
+    /**
+     * Set the API key value for the first API key authentication.
+     *
+     * @param apiKey API key
+     * @param paramName The name of the API key parameter, or null or set the first key.
+     */
+    fun setApiKey(apiKey: String, paramName: String? = null) {
+        val auth = authentications?.values?.firstOrNull { it is ApiKeyAuth && (paramName == null || paramName == it.paramName)} as ApiKeyAuth?
+                ?: throw Exception("No API key authentication configured")
+        auth.apiKey = apiKey
+    }
+
+    /**
+     * Set the API key prefix for the first API key authentication.
+     *
+     * @param apiKeyPrefix API key prefix
+     * @param paramName The name of the API key parameter, or null or set the first key.
+     */
+    fun setApiKeyPrefix(apiKeyPrefix: String, paramName: String? = null) {
+        val auth = authentications?.values?.firstOrNull { it is ApiKeyAuth && (paramName == null || paramName == it.paramName) } as ApiKeyAuth?
+                ?: throw Exception("No API key authentication configured")
+        auth.apiKeyPrefix = apiKeyPrefix
+    }
+
+    /**
+     * Set the access token for the first OAuth2 authentication.
+     *
+     * @param accessToken Access token
+     */
+    fun setAccessToken(accessToken: String) {
+        val auth = authentications?.values?.firstOrNull { it is OAuth } as OAuth?
+                ?: throw Exception("No OAuth2 authentication configured")
+        auth.accessToken = accessToken
+    }
+
+    /**
+     * Set the access token for the first Bearer authentication.
+     *
+     * @param bearerToken The bearer token.
+     */
+    fun setBearerToken(bearerToken: String) {
+        val auth = authentications?.values?.firstOrNull { it is HttpBearerAuth } as HttpBearerAuth?
+                ?: throw Exception("No Bearer authentication configured")
+        auth.bearerToken = bearerToken
+    }
+
+    protected suspend fun <T: Any?> multipartFormRequest(requestConfig: RequestConfig<T>, body: kotlin.collections.List<PartData>?, authNames: kotlin.collections.List<String>): HttpResponse {
+        return request(requestConfig, MultiPartFormDataContent(body ?: listOf()), authNames)
+    }
+
+    protected suspend fun <T: Any?> urlEncodedFormRequest(requestConfig: RequestConfig<T>, body: Parameters?, authNames: kotlin.collections.List<String>): HttpResponse {
+        return request(requestConfig, FormDataContent(body ?: Parameters.Empty), authNames)
+    }
+
+    protected suspend fun <T: Any?> jsonRequest(requestConfig: RequestConfig<T>, body: Any? = null, authNames: kotlin.collections.List<String>): HttpResponse = request(requestConfig, body, authNames)
+
+    protected suspend fun <T: Any?> request(requestConfig: RequestConfig<T>, body: Any? = null, authNames: kotlin.collections.List<String>): HttpResponse {
+        requestConfig.updateForAuth<T>(authNames)
+        val headers = requestConfig.headers
+
+        return client.request {
+            this.url {
+                this.takeFrom(URLBuilder(baseUrl))
+                appendPath(requestConfig.path.trimStart('/').split('/'))
+                requestConfig.query.forEach { query ->
+                    query.value.forEach { value ->
+                        parameter(query.key, value)
+                    }
+                }
+            }
+            this.method = requestConfig.method.httpMethod
+            headers.filter { header -> !UNSAFE_HEADERS.contains(header.key) }.forEach { header -> this.header(header.key, header.value) }
+            if (requestConfig.method in listOf(RequestMethod.PUT, RequestMethod.POST, RequestMethod.PATCH)) {
+                val contentType = (requestConfig.headers[HttpHeaders.ContentType]?.let { ContentType.parse(it) }
+                    ?: ContentType.Application.Json)
+                this.contentType(contentType)
+                this.setBody(body)
+            }
+        }
+    }
+
+    private fun <T: Any?> RequestConfig<T>.updateForAuth(authNames: kotlin.collections.List<String>) {
+        for (authName in authNames) {
+            val auth = authentications?.get(authName) ?: throw Exception("Authentication undefined: $authName")
+            auth.apply(query, headers)
+        }
+    }
+
+    private fun URLBuilder.appendPath(components: kotlin.collections.List<String>): URLBuilder = apply {
+        encodedPath = encodedPath.trimEnd('/') + components.joinToString("/", prefix = "/") { it.encodeURLQueryComponent() }
+    }
+
+    private val RequestMethod.httpMethod: HttpMethod
+        get() = when (this) {
+            RequestMethod.DELETE -> HttpMethod.Delete
+            RequestMethod.GET -> HttpMethod.Get
+            RequestMethod.HEAD -> HttpMethod.Head
+            RequestMethod.PATCH -> HttpMethod.Patch
+            RequestMethod.PUT -> HttpMethod.Put
+            RequestMethod.POST -> HttpMethod.Post
+            RequestMethod.OPTIONS -> HttpMethod.Options
+        }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/Base64ByteArray.kt

@@ -0,0 +1,30 @@
+package org.openapitools.client.infrastructure
+
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+@Serializable
+class Base64ByteArray(val value: ByteArray) {
+    @Serializer(Base64ByteArray::class)
+    companion object : KSerializer<Base64ByteArray> {
+        override val descriptor = PrimitiveSerialDescriptor("Base64ByteArray", PrimitiveKind.STRING)
+        override fun serialize(encoder: Encoder, obj: Base64ByteArray) = encoder.encodeString(obj.value.encodeBase64())
+        override fun deserialize(decoder: Decoder) = Base64ByteArray(decoder.decodeString().decodeBase64Bytes())
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+        other as Base64ByteArray
+        return value.contentEquals(other.value)
+    }
+
+    override fun hashCode(): Int {
+        return value.contentHashCode()
+    }
+
+    override fun toString(): String {
+        return "Base64ByteArray(${hex(value)})"
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/Bytes.kt

@@ -0,0 +1,100 @@
+package org.openapitools.client.infrastructure
+
+import io.ktor.utils.io.core.*
+import kotlin.experimental.and
+
+private val digits = "0123456789abcdef".toCharArray()
+private const val BASE64_ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+private const val BASE64_MASK: Byte = 0x3f
+private const val BASE64_PAD = '='
+private val BASE64_INVERSE_ALPHABET = IntArray(256) { BASE64_ALPHABET.indexOf(it.toChar()) }
+
+private fun String.toCharArray(): CharArray = CharArray(length) { get(it) }
+private fun ByteArray.clearFrom(from: Int) = (from until size).forEach { this[it] = 0 }
+private fun Int.toBase64(): Char = BASE64_ALPHABET[this]
+private fun Byte.fromBase64(): Byte = BASE64_INVERSE_ALPHABET[toInt() and 0xff].toByte() and BASE64_MASK
+internal fun ByteArray.encodeBase64(): String = buildPacket { writeFully(this@encodeBase64) }.encodeBase64()
+internal fun String.decodeBase64Bytes(): ByteArray = buildPacket { writeText(dropLastWhile { it == BASE64_PAD }) }.decodeBase64Bytes().readBytes()
+
+/**
+ * Encode [bytes] as a HEX string with no spaces, newlines and `0x` prefixes.
+ *
+ * Taken from https://github.com/ktorio/ktor/blob/master/ktor-utils/common/src/io/ktor/util/Crypto.kt
+ */
+internal fun hex(bytes: ByteArray): String {
+    val result = CharArray(bytes.size * 2)
+    var resultIndex = 0
+    val digits = digits
+
+    for (element in bytes) {
+        val b = element.toInt() and 0xff
+        result[resultIndex++] = digits[b shr 4]
+        result[resultIndex++] = digits[b and 0x0f]
+    }
+
+    return result.concatToString()
+}
+
+/**
+ * Decode bytes from HEX string. It should be no spaces and `0x` prefixes.
+ *
+ * Taken from https://github.com/ktorio/ktor/blob/master/ktor-utils/common/src/io/ktor/util/Crypto.kt
+ */
+internal fun hex(s: String): ByteArray {
+    val result = ByteArray(s.length / 2)
+    for (idx in result.indices) {
+        val srcIdx = idx * 2
+        val high = s[srcIdx].toString().toInt(16) shl 4
+        val low = s[srcIdx + 1].toString().toInt(16)
+        result[idx] = (high or low).toByte()
+    }
+
+    return result
+}
+
+/**
+ * Encode [ByteReadPacket] in base64 format.
+ *
+ * Taken from https://github.com/ktorio/ktor/blob/424d1d2cfaa3281302c60af9500f738c8c2fc846/ktor-utils/common/src/io/ktor/util/Base64.kt
+ */
+private fun ByteReadPacket.encodeBase64(): String = buildString {
+    val data = ByteArray(3)
+    while (remaining > 0) {
+        val read = readAvailable(data)
+        data.clearFrom(read)
+
+        val padSize = (data.size - read) * 8 / 6
+        val chunk = ((data[0].toInt() and 0xFF) shl 16) or
+                ((data[1].toInt() and 0xFF) shl 8) or
+                (data[2].toInt() and 0xFF)
+
+        for (index in data.size downTo padSize) {
+            val char = (chunk shr (6 * index)) and BASE64_MASK.toInt()
+            append(char.toBase64())
+        }
+
+        repeat(padSize) { append(BASE64_PAD) }
+    }
+}
+
+/**
+ * Decode [ByteReadPacket] from base64 format
+ *
+ * Taken from https://github.com/ktorio/ktor/blob/424d1d2cfaa3281302c60af9500f738c8c2fc846/ktor-utils/common/src/io/ktor/util/Base64.kt
+ */
+private fun ByteReadPacket.decodeBase64Bytes(): Input = buildPacket {
+    val data = ByteArray(4)
+
+    while (remaining > 0) {
+        val read = readAvailable(data)
+
+        val chunk = data.foldIndexed(0) { index, result, current ->
+            result or (current.fromBase64().toInt() shl ((3 - index) * 6))
+        }
+
+        for (index in data.size - 2 downTo (data.size - read)) {
+            val origin = (chunk shr (8 * index)) and 0xff
+            writeByte(origin.toByte())
+        }
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/HttpResponse.kt

@@ -0,0 +1,51 @@
+package org.openapitools.client.infrastructure
+
+import io.ktor.http.Headers
+import io.ktor.http.isSuccess
+import io.ktor.util.reflect.TypeInfo
+import io.ktor.util.reflect.typeInfo
+
+open class HttpResponse<T : Any>(val response: io.ktor.client.statement.HttpResponse, val provider: BodyProvider<T>) {
+    val status: Int = response.status.value
+    val success: Boolean = response.status.isSuccess()
+    val headers: Map<String, List<String>> = response.headers.mapEntries()
+    suspend fun body(): T = provider.body(response)
+    suspend fun <V : Any> typedBody(type: TypeInfo): V = provider.typedBody(response, type)
+
+    companion object {
+        private fun Headers.mapEntries(): Map<String, List<String>> {
+            val result = mutableMapOf<String, List<String>>()
+            entries().forEach { result[it.key] = it.value }
+            return result
+        }
+    }
+}
+
+interface BodyProvider<T : Any> {
+    suspend fun body(response: io.ktor.client.statement.HttpResponse): T
+    suspend fun <V : Any> typedBody(response: io.ktor.client.statement.HttpResponse, type: TypeInfo): V
+}
+
+class TypedBodyProvider<T : Any>(private val type: TypeInfo) : BodyProvider<T> {
+    @Suppress("UNCHECKED_CAST")
+    override suspend fun body(response: io.ktor.client.statement.HttpResponse): T =
+            response.call.body(type) as T
+
+    @Suppress("UNCHECKED_CAST")
+    override suspend fun <V : Any> typedBody(response: io.ktor.client.statement.HttpResponse, type: TypeInfo): V =
+            response.call.body(type) as V
+}
+
+class MappedBodyProvider<S : Any, T : Any>(private val provider: BodyProvider<S>, private val block: S.() -> T) : BodyProvider<T> {
+    override suspend fun body(response: io.ktor.client.statement.HttpResponse): T =
+            block(provider.body(response))
+
+    override suspend fun <V : Any> typedBody(response: io.ktor.client.statement.HttpResponse, type: TypeInfo): V =
+            provider.typedBody(response, type)
+}
+
+inline fun <reified T : Any> io.ktor.client.statement.HttpResponse.wrap(): HttpResponse<T> =
+        HttpResponse(this, TypedBodyProvider(typeInfo<T>()))
+
+fun <T : Any, V : Any> HttpResponse<T>.map(block: T.() -> V): HttpResponse<V> =
+        HttpResponse(response, MappedBodyProvider(provider, block))

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/OctetByteArray.kt

@@ -0,0 +1,30 @@
+package org.openapitools.client.infrastructure
+
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+@Serializable
+class OctetByteArray(val value: ByteArray) {
+    @Serializer(OctetByteArray::class)
+    companion object : KSerializer<OctetByteArray> {
+        override val descriptor = PrimitiveSerialDescriptor("OctetByteArray", PrimitiveKind.STRING)
+        override fun serialize(encoder: Encoder, obj: OctetByteArray) = encoder.encodeString(hex(obj.value))
+        override fun deserialize(decoder: Decoder) = OctetByteArray(hex(decoder.decodeString()))
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+        other as OctetByteArray
+        return value.contentEquals(other.value)
+    }
+
+    override fun hashCode(): Int {
+        return value.contentHashCode()
+    }
+
+    override fun toString(): String {
+        return "OctetByteArray(${hex(value)})"
+    }
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/PartConfig.kt

@@ -0,0 +1,11 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Defines a config object for a given part of a multi-part request.
+ * NOTE: Headers is a Map<String,String> because rfc2616 defines
+ *       multi-valued headers as csv-only.
+ */
+data class PartConfig<T>(
+    val headers: MutableMap<String, String> = mutableMapOf(),
+    val body: T? = null
+)

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/RequestConfig.kt

@@ -0,0 +1,18 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Defines a config object for a given request.
+ * NOTE: This object doesn't include 'body' because it
+ *       allows for caching of the constructed object
+ *       for many request definitions.
+ * NOTE: Headers is a Map<String,String> because rfc2616 defines
+ *       multi-valued headers as csv-only.
+ */
+data class RequestConfig<T>(
+    val method: RequestMethod,
+    val path: String,
+    val headers: MutableMap<String, String> = mutableMapOf(),
+    val query: MutableMap<String, List<String>> = mutableMapOf(),
+    val requiresAuthentication: Boolean,
+    val body: T? = null
+)

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/infrastructure/RequestMethod.kt

@@ -0,0 +1,8 @@
+package org.openapitools.client.infrastructure
+
+/**
+ * Provides enumerated HTTP verbs
+ */
+enum class RequestMethod {
+    GET, DELETE, HEAD, OPTIONS, PATCH, POST, PUT
+}

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/models/Category.kt

@@ -0,0 +1,38 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+/**
+ * A category for a pet
+ *
+ * @param id 
+ * @param name 
+ */
+@Serializable
+
+data class Category (
+
+    @SerialName(value = "id") val id: kotlin.Long? = null,
+
+    @SerialName(value = "name") val name: kotlin.String? = null
+
+)
+

samples/client/petstore/kotlin-multiplatform-kotlinx-datetime/src/commonMain/kotlin/org/openapitools/client/models/ModelApiResponse.kt

@@ -0,0 +1,41 @@
+/**
+ *
+ * Please note:
+ * This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * Do not edit this file manually.
+ *
+ */
+
+@file:Suppress(
+    "ArrayInDataClass",
+    "EnumEntryName",
+    "RemoveRedundantQualifierName",
+    "UnusedImport"
+)
+
+package org.openapitools.client.models
+
+
+import kotlinx.serialization.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.encoding.*
+
+/**
+ * Describes the result of uploading an image resource
+ *
+ * @param code 
+ * @param type 
+ * @param message 
+ */
+@Serializable
+
+data class ModelApiResponse (
+
+    @SerialName(value = "code") val code: kotlin.Int? = null,
+
+    @SerialName(value = "type") val type: kotlin.String? = null,
+
+    @SerialName(value = "message") val message: kotlin.String? = null
+
+)
+