[Kotlin][Spring] fix #19244 integer enum (#19248)

* [Kotlin][Spring] fix #19244 integer enum

* fix embedded array enum

bin/configs/kotlin-spring-boot-integer-enum.yaml

@@ -0,0 +1,13 @@
+generatorName: kotlin-spring
+outputDir: samples/server/petstore/kotlin-springboot-integer-enum
+library: spring-boot
+inputSpec: modules/openapi-generator/src/test/resources/3_0/kotlin/issue19244_integer_enum.yaml
+templateDir: modules/openapi-generator/src/main/resources/kotlin-spring
+additionalProperties:
+  interfaceOnly: "true"
+  skipDefaultInterface: "true"
+  useTags: "true"
+  useSpringBoot3: "true"
+  annotationLibrary: none
+  documentationProvider: none
+  enumPropertyNaming: UPPERCASE

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

@@ -815,6 +815,7 @@ public class KotlinSpringServerCodegen extends AbstractKotlinCodegen
             model.imports.add("JsonProperty");
             if (Boolean.TRUE.equals(model.hasEnums)) {
                 model.imports.add("JsonValue");
+                model.imports.add("JsonCreator");
             }
         } else {
             //Needed imports for Jackson's JsonCreator
@@ -840,10 +841,14 @@ public class KotlinSpringServerCodegen extends AbstractKotlinCodegen
                 .filter(cm -> Boolean.TRUE.equals(cm.isEnum) && cm.allowableValues != null)
                 .forEach(cm -> {
                     cm.imports.add(importMapping.get("JsonValue"));
+                    cm.imports.add(importMapping.get("JsonCreator"));
                     cm.imports.add(importMapping.get("JsonProperty"));
                     Map<String, String> itemJsonValue = new HashMap<>();
                     itemJsonValue.put("import", importMapping.get("JsonValue"));
                     imports.add(itemJsonValue);
+                    Map<String, String> itemJsonCreator = new HashMap<>();
+                    itemJsonCreator.put("import", importMapping.get("JsonCreator"));
+                    imports.add(itemJsonCreator);
                     Map<String, String> itemJsonProperty = new HashMap<>();
                     itemJsonProperty.put("import", importMapping.get("JsonProperty"));
                     imports.add(itemJsonProperty);

modules/openapi-generator/src/main/resources/kotlin-spring/dataClass.mustache

@@ -31,9 +31,17 @@
     * {{{description}}}
     * Values: {{#allowableValues}}{{#enumVars}}{{&name}}{{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}}
     */
-    enum class {{{nameInPascalCase}}}(val value: {{#isContainer}}{{#items}}{{{dataType}}}{{/items}}{{/isContainer}}{{^isContainer}}{{{dataType}}}{{/isContainer}}) {
+    enum class {{{nameInPascalCase}}}(@get:JsonValue val value: {{#isContainer}}{{#items}}{{{dataType}}}{{/items}}{{/isContainer}}{{^isContainer}}{{{dataType}}}{{/isContainer}}) {
 {{#allowableValues}}{{#enumVars}}
-        @JsonProperty({{{value}}}) {{{name}}}({{{value}}}){{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}}
+        {{{name}}}({{{value}}}){{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}};
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: {{#isContainer}}{{#items}}{{{dataType}}}{{/items}}{{/isContainer}}{{^isContainer}}{{{dataType}}}{{/isContainer}}): {{{nameInPascalCase}}} {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 {{/isEnum}}{{/vars}}{{/hasEnums}}
 {{#serializableModel}}

modules/openapi-generator/src/main/resources/kotlin-spring/enumClass.mustache

@@ -2,7 +2,15 @@
 * {{{description}}}
 * Values: {{#allowableValues}}{{#enumVars}}{{&name}}{{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}}
 */
-enum class {{classname}}(val value: {{dataType}}) {
+enum class {{classname}}(@get:JsonValue val value: {{dataType}}) {
 {{#allowableValues}}{{#enumVars}}
-    @JsonProperty({{{value}}}) {{&name}}({{{value}}}){{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}}
+    {{&name}}({{{value}}}){{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}};
+
+    companion object {
+        @JvmStatic
+        @JsonCreator
+        fun forValue(value: {{dataType}}): {{classname}} {
+                return values().first{it -> it.value == value}
+        }
+    }
 }

modules/openapi-generator/src/test/resources/3_0/kotlin/issue19244_integer_enum.yaml

@@ -0,0 +1,46 @@
+openapi: 3.0.3
+info:
+  description: >-
+    Example created
+  version: 1.0.0
+  title: OpenAPI Stuff API created to reproduce issue
+  license:
+    name: Apache-2.0
+    url: 'https://www.apache.org/licenses/LICENSE-2.0.html'
+paths:
+  /healthcheck:
+    get:
+      summary: Health check endpoint.
+      operationId: healthcheck
+      responses:
+        204:
+          description: Successful health check
+        default:
+          description: Unexpected error
+          content:
+            'application/json':
+              schema:
+                $ref: '#/components/schemas/ApiError'
+
+components:
+  schemas:
+    ApiError:
+      required:
+        - errorCode
+      type: object
+      properties:
+        errorCode:
+          type: integer
+          enum:
+            - 0
+            - 100
+          x-enum-varnames:
+            - OK
+            - ERROR
+        reasonCode:
+          $ref: '#/components/schemas/ReasonCode'
+    ReasonCode:
+      type: integer
+      enum:
+        - 10
+        - 20

samples/server/petstore/kotlin-spring-cloud/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -42,11 +43,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-spring-cloud/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -47,11 +48,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -83,11 +84,19 @@ data class AnyOfUserOrPet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPetOrArrayString.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -83,11 +84,19 @@ data class AnyOfUserOrPetOrArrayString(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import javax.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/UserOrPet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -83,11 +84,19 @@ data class UserOrPet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/UserOrPetOrArrayString.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -83,11 +84,19 @@ data class UserOrPetOrArrayString(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-3/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -42,11 +43,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-3/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -47,11 +48,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-delegate-nodefaults/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import jakarta.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-delegate-nodefaults/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-delegate/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import javax.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-delegate/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-integer-enum/.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/server/petstore/kotlin-springboot-integer-enum/.openapi-generator/FILES

@@ -0,0 +1,9 @@
+README.md
+build.gradle.kts
+pom.xml
+settings.gradle
+src/main/kotlin/org/openapitools/api/ApiUtil.kt
+src/main/kotlin/org/openapitools/api/DefaultApi.kt
+src/main/kotlin/org/openapitools/api/Exceptions.kt
+src/main/kotlin/org/openapitools/model/ApiError.kt
+src/main/kotlin/org/openapitools/model/ReasonCode.kt

samples/server/petstore/kotlin-springboot-integer-enum/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.8.0-SNAPSHOT

samples/server/petstore/kotlin-springboot-integer-enum/README.md

@@ -0,0 +1,21 @@
+# openAPIStuffAPICreatedToReproduceIssue
+
+This Kotlin based [Spring Boot](https://spring.io/projects/spring-boot) application has been generated using the [OpenAPI Generator](https://github.com/OpenAPITools/openapi-generator).
+
+## Getting Started
+
+This document assumes you have either maven or gradle available, either via the wrapper or otherwise. This does not come with a gradle / maven wrapper checked in.
+
+By default a [`pom.xml`](pom.xml) file will be generated. If you specified `gradleBuildFile=true` when generating this project, a `build.gradle.kts` will also be generated. Note this uses [Gradle Kotlin DSL](https://github.com/gradle/kotlin-dsl).
+
+To build the project using maven, run:
+```bash
+mvn package && java -jar target/openapi-spring-1.0.0.jar
+```
+
+To build the project using gradle, run:
+```bash
+gradle build && java -jar build/libs/openapi-spring-1.0.0.jar
+```
+
+If all builds successfully, the server should run on [http://localhost:8080/](http://localhost:8080/)

samples/server/petstore/kotlin-springboot-integer-enum/build.gradle.kts

@@ -0,0 +1,46 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+group = "org.openapitools"
+version = "1.0.0"
+java.sourceCompatibility = JavaVersion.VERSION_17
+
+repositories {
+    mavenCentral()
+    maven { url = uri("https://repo.spring.io/milestone") }
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "17"
+}
+
+tasks.bootJar {
+    enabled = false
+}
+
+plugins {
+    val kotlinVersion = "1.7.10"
+    id("org.jetbrains.kotlin.jvm") version kotlinVersion
+    id("org.jetbrains.kotlin.plugin.jpa") version kotlinVersion
+    id("org.jetbrains.kotlin.plugin.spring") version kotlinVersion
+    id("org.springframework.boot") version "3.0.2"
+    id("io.spring.dependency-management") version "1.0.14.RELEASE"
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+    implementation("org.jetbrains.kotlin:kotlin-reflect")
+        implementation("org.springframework.boot:spring-boot-starter-web")
+
+    implementation("com.google.code.findbugs:jsr305:3.0.2")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml")
+    implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+    implementation("jakarta.validation:jakarta.validation-api")
+    implementation("jakarta.annotation:jakarta.annotation-api:2.1.0")
+
+    testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
+    testImplementation("org.springframework.boot:spring-boot-starter-test") {
+        exclude(module = "junit")
+    }
+}

samples/server/petstore/kotlin-springboot-integer-enum/pom.xml

@@ -0,0 +1,132 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.openapitools</groupId>
+    <artifactId>openapi-spring</artifactId>
+    <packaging>jar</packaging>
+    <name>openapi-spring</name>
+    <version>1.0.0</version>
+    <properties>
+        <findbugs-jsr305.version>3.0.2</findbugs-jsr305.version>
+        <jakarta-annotation.version>2.1.0</jakarta-annotation.version>
+        <kotlin-test-junit5.version>1.7.10</kotlin-test-junit5.version>
+
+        <kotlin.version>1.7.10</kotlin.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.1.3</version>
+    </parent>
+    <repositories>
+        <repository>
+            <id>repository.spring.milestone</id>
+            <name>Spring Milestone Repository</name>
+            <url>https://repo.spring.io/milestone</url>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <url>https://repo.spring.io/milestone</url>
+        </pluginRepository>
+    </pluginRepositories>
+    <build>
+        <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
+        <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
+        <plugins>
+            <plugin>
+                <artifactId>kotlin-maven-plugin</artifactId>
+                <groupId>org.jetbrains.kotlin</groupId>
+                <version>${kotlin.version}</version>
+                <configuration>
+                    <compilerPlugins>
+                        <plugin>spring</plugin>
+                    </compilerPlugins>
+                    <jvmTarget>17</jvmTarget>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>test-compile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.jetbrains.kotlin</groupId>
+                        <artifactId>kotlin-maven-allopen</artifactId>
+                        <version>${kotlin.version}</version>
+                    </dependency>
+                </dependencies>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib-jdk8</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-reflect</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+
+
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>${findbugs-jsr305.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-yaml</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-xml</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.module</groupId>
+            <artifactId>jackson-module-kotlin</artifactId>
+        </dependency>
+        <!-- Bean Validation API support -->
+        <dependency>
+            <groupId>jakarta.validation</groupId>
+            <artifactId>jakarta.validation-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.annotation</groupId>
+            <artifactId>jakarta.annotation-api</artifactId>
+            <version>${jakarta-annotation.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-test-junit5</artifactId>
+            <version>${kotlin-test-junit5.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

samples/server/petstore/kotlin-springboot-integer-enum/settings.gradle

@@ -0,0 +1,15 @@
+pluginManagement {
+    repositories {
+        maven { url = uri("https://repo.spring.io/snapshot") }
+        maven { url = uri("https://repo.spring.io/milestone") }
+        gradlePluginPortal()
+    }
+    resolutionStrategy {
+        eachPlugin {
+            if (requested.id.id == "org.springframework.boot") {
+                useModule("org.springframework.boot:spring-boot-gradle-plugin:${requested.version}")
+            }
+        }
+    }
+}
+rootProject.name = "openapi-spring"

samples/server/petstore/kotlin-springboot-integer-enum/src/main/kotlin/org/openapitools/api/ApiUtil.kt

@@ -0,0 +1,19 @@
+package org.openapitools.api
+
+import org.springframework.web.context.request.NativeWebRequest
+
+import jakarta.servlet.http.HttpServletResponse
+import java.io.IOException
+
+object ApiUtil {
+    fun setExampleResponse(req: NativeWebRequest, contentType: String, example: String) {
+        try {
+            val res = req.getNativeResponse(HttpServletResponse::class.java)
+            res?.characterEncoding = "UTF-8"
+            res?.addHeader("Content-Type", contentType)
+            res?.writer?.print(example)
+        } catch (e: IOException) {
+            throw RuntimeException(e)
+        }
+    }
+}

samples/server/petstore/kotlin-springboot-integer-enum/src/main/kotlin/org/openapitools/api/DefaultApi.kt

@@ -0,0 +1,42 @@
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) (7.8.0-SNAPSHOT).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.api
+
+import org.openapitools.model.ApiError
+import org.springframework.http.HttpStatus
+import org.springframework.http.MediaType
+import org.springframework.http.ResponseEntity
+
+import org.springframework.web.bind.annotation.*
+import org.springframework.validation.annotation.Validated
+import org.springframework.web.context.request.NativeWebRequest
+import org.springframework.beans.factory.annotation.Autowired
+
+import jakarta.validation.constraints.DecimalMax
+import jakarta.validation.constraints.DecimalMin
+import jakarta.validation.constraints.Email
+import jakarta.validation.constraints.Max
+import jakarta.validation.constraints.Min
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Pattern
+import jakarta.validation.constraints.Size
+import jakarta.validation.Valid
+
+import kotlin.collections.List
+import kotlin.collections.Map
+
+@RestController
+@Validated
+interface DefaultApi {
+
+
+    @RequestMapping(
+            method = [RequestMethod.GET],
+            value = ["/healthcheck"],
+            produces = ["application/json"]
+    )
+    fun healthcheck(): ResponseEntity<Unit>
+}

samples/server/petstore/kotlin-springboot-integer-enum/src/main/kotlin/org/openapitools/api/Exceptions.kt

@@ -0,0 +1,29 @@
+package org.openapitools.api
+
+import org.springframework.http.HttpStatus
+import org.springframework.web.bind.annotation.ControllerAdvice
+import org.springframework.web.bind.annotation.ExceptionHandler
+import jakarta.servlet.http.HttpServletResponse
+import jakarta.validation.ConstraintViolationException
+
+// TODO Extend ApiException for custom exception handling, e.g. the below NotFound exception
+sealed class ApiException(msg: String, val code: Int) : Exception(msg)
+
+class NotFoundException(msg: String, code: Int = HttpStatus.NOT_FOUND.value()) : ApiException(msg, code)
+
+
+@ControllerAdvice
+class DefaultExceptionHandler {
+
+    @ExceptionHandler(value = [ApiException::class])
+    fun onApiException(ex: ApiException, response: HttpServletResponse): Unit =
+        response.sendError(ex.code, ex.message)
+
+    @ExceptionHandler(value = [NotImplementedError::class])
+    fun onNotImplemented(ex: NotImplementedError, response: HttpServletResponse): Unit =
+        response.sendError(HttpStatus.NOT_IMPLEMENTED.value())
+
+    @ExceptionHandler(value = [ConstraintViolationException::class])
+    fun onConstraintViolation(ex: ConstraintViolationException, response: HttpServletResponse): Unit =
+        response.sendError(HttpStatus.BAD_REQUEST.value(), ex.constraintViolations.joinToString(", ") { it.message })
+}

samples/server/petstore/kotlin-springboot-integer-enum/src/main/kotlin/org/openapitools/model/ApiError.kt

@@ -0,0 +1,50 @@
+package org.openapitools.model
+
+import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
+import com.fasterxml.jackson.annotation.JsonProperty
+import com.fasterxml.jackson.annotation.JsonValue
+import org.openapitools.model.ReasonCode
+import jakarta.validation.constraints.DecimalMax
+import jakarta.validation.constraints.DecimalMin
+import jakarta.validation.constraints.Email
+import jakarta.validation.constraints.Max
+import jakarta.validation.constraints.Min
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Pattern
+import jakarta.validation.constraints.Size
+import jakarta.validation.Valid
+
+/**
+ * 
+ * @param errorCode 
+ * @param reasonCode 
+ */
+data class ApiError(
+
+    @get:JsonProperty("errorCode", required = true) val errorCode: ApiError.ErrorCode,
+
+    @field:Valid
+    @get:JsonProperty("reasonCode") val reasonCode: ReasonCode? = null
+) {
+
+    /**
+    * 
+    * Values: OK,ERROR
+    */
+    enum class ErrorCode(@get:JsonValue val value: kotlin.Int) {
+
+        OK(0),
+        ERROR(100);
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.Int): ErrorCode {
+                return values().first{it -> it.value == value}
+            }
+        }
+    }
+
+}
+

samples/server/petstore/kotlin-springboot-integer-enum/src/main/kotlin/org/openapitools/model/ReasonCode.kt

@@ -0,0 +1,34 @@
+package org.openapitools.model
+
+import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonValue
+import com.fasterxml.jackson.annotation.JsonCreator
+import com.fasterxml.jackson.annotation.JsonProperty
+import jakarta.validation.constraints.DecimalMax
+import jakarta.validation.constraints.DecimalMin
+import jakarta.validation.constraints.Email
+import jakarta.validation.constraints.Max
+import jakarta.validation.constraints.Min
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Pattern
+import jakarta.validation.constraints.Size
+import jakarta.validation.Valid
+
+/**
+* 
+* Values: _10,_20
+*/
+enum class ReasonCode(@get:JsonValue val value: kotlin.Int) {
+
+    _10(10),
+    _20(20);
+
+    companion object {
+        @JvmStatic
+        @JsonCreator
+        fun forValue(value: kotlin.Int): ReasonCode {
+                return values().first{it -> it.value == value}
+        }
+    }
+}
+

samples/server/petstore/kotlin-springboot-modelMutable/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -49,11 +50,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-modelMutable/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-multipart-request-model/src/main/kotlin/org/openapitools/model/MultipartMixedStatus.kt

@@ -2,6 +2,7 @@ package org.openapitools.model
 
 import java.util.Objects
 import com.fasterxml.jackson.annotation.JsonValue
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import javax.validation.constraints.DecimalMax
 import javax.validation.constraints.DecimalMin
@@ -18,10 +19,18 @@ import io.swagger.v3.oas.annotations.media.Schema
 * additional field as Enum
 * Values: ALLOWED,IN_PROGRESS,REJECTED
 */
-enum class MultipartMixedStatus(val value: kotlin.String) {
+enum class MultipartMixedStatus(@get:JsonValue val value: kotlin.String) {
 
-    @JsonProperty("ALLOWED") ALLOWED("ALLOWED"),
+    ALLOWED("ALLOWED"),
-    @JsonProperty("IN_PROGRESS") IN_PROGRESS("IN_PROGRESS"),
+    IN_PROGRESS("IN_PROGRESS"),
-    @JsonProperty("REJECTED") REJECTED("REJECTED")
+    REJECTED("REJECTED");
+
+    companion object {
+        @JvmStatic
+        @JsonCreator
+        fun forValue(value: kotlin.String): MultipartMixedStatus {
+                return values().first{it -> it.value == value}
+        }
+    }
 }
 

samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import javax.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -52,11 +53,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-request-cookie/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import jakarta.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-request-cookie/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -52,11 +53,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-request/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import jakarta.validation.constraints.DecimalMax
@@ -48,11 +49,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-request/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -52,11 +53,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
 }

samples/server/petstore/kotlin-springboot-source-swagger1/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -49,11 +50,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-source-swagger1/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-source-swagger2/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -49,11 +50,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-source-swagger2/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-springfox/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -49,11 +50,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot-springfox/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -53,11 +54,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Order.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import java.io.Serializable
@@ -42,11 +43,19 @@ data class Order(
     * Order Status
     * Values: placed,approved,delivered
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("placed") placed("placed"),
+        placed("placed"),
-        @JsonProperty("approved") approved("approved"),
+        approved("approved"),
-        @JsonProperty("delivered") delivered("delivered")
+        delivered("delivered");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {

samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonValue
 import org.openapitools.model.Category
@@ -46,11 +47,19 @@ data class Pet(
     * pet status in the store
     * Values: available,pending,sold
     */
-    enum class Status(val value: kotlin.String) {
+    enum class Status(@get:JsonValue val value: kotlin.String) {
 
-        @JsonProperty("available") available("available"),
+        available("available"),
-        @JsonProperty("pending") pending("pending"),
+        pending("pending"),
-        @JsonProperty("sold") sold("sold")
+        sold("sold");
+
+        companion object {
+            @JvmStatic
+            @JsonCreator
+            fun forValue(value: kotlin.String): Status {
+                return values().first{it -> it.value == value}
+            }
+        }
     }
 
     companion object {