[BUG] [KOTLIN] Fix default value generation for Kotlin Strings (#5776)

* fix default value generation for kotlin

* add updated pet templates

* Revert "add updated pet templates"

This reverts commit 7e8168ad

* regen pet store projects code

samples/server/petstore/kotlin-springboot-modelMutable/.openapi-generator/VERSION

@@ -1 +1 @@
-4.2.3-SNAPSHOT
+4.3.1-SNAPSHOT

samples/server/petstore/kotlin-springboot-modelMutable/build.gradle.kts

@@ -3,7 +3,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 buildscript {
     repositories {
         jcenter()
-        mavenCentral()
+        maven { url = uri("https://repo1.maven.org/maven2") }
     }
     dependencies {
         classpath("org.springframework.boot:spring-boot-gradle-plugin:2.2.0.M3")
@@ -15,7 +15,7 @@ version = "1.0.0"
 
 repositories {
     jcenter()
-    mavenCentral()
+    maven { url = uri("https://repo1.maven.org/maven2") }
 }
 
 tasks.withType<KotlinCompile> {
@@ -48,7 +48,7 @@ dependencies {
 }
 
 repositories {
-	mavenCentral()
+	maven { url = uri("https://repo1.maven.org/maven2") }
 	maven { url = uri("https://repo.spring.io/snapshot") }
 	maven { url = uri("https://repo.spring.io/milestone") }
 }

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

@@ -0,0 +1,19 @@
+package org.openapitools.api
+
+import org.springframework.web.context.request.NativeWebRequest
+
+import javax.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.setCharacterEncoding("UTF-8")
+            res.addHeader("Content-Type", contentType)
+            res.getWriter().print(example)
+        } catch (e: IOException) {
+            throw RuntimeException(e)
+        }
+    }
+}

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

@@ -17,13 +17,13 @@ class DefaultExceptionHandler {
 
     @ExceptionHandler(value = [ApiException::class])
     fun onApiException(ex: ApiException, response: HttpServletResponse): Unit =
-            response.sendError(ex.code, ex.message)
+        response.sendError(ex.code, ex.message)
 
     @ExceptionHandler(value = [NotImplementedError::class])
     fun onNotImplemented(ex: NotImplementedError, response: HttpServletResponse): Unit =
-            response.sendError(HttpStatus.NOT_IMPLEMENTED.value())
+        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 })
+        response.sendError(HttpStatus.BAD_REQUEST.value(), ex.constraintViolations.joinToString(", ") { it.message })
 }

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

@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Category (
+data class Category(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") var id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") var id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") var name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") var name: kotlin.String? = null
 ) {
 
 }

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

@@ -17,16 +17,16 @@ import io.swagger.annotations.ApiModelProperty
  * @param type 
  * @param message 
  */
-data class ModelApiResponse (
+data class ModelApiResponse(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("code") var code: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("code") var code: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("type") var type: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("type") var type: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("message") var message: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("message") var message: kotlin.String? = null
 ) {
 
 }

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

@@ -21,25 +21,25 @@ import io.swagger.annotations.ApiModelProperty
  * @param status Order Status
  * @param complete 
  */
-data class Order (
+data class Order(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") var id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") var id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("petId") var petId: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("petId") var petId: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("quantity") var quantity: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("quantity") var quantity: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("shipDate") var shipDate: java.time.OffsetDateTime? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("shipDate") var shipDate: java.time.OffsetDateTime? = null,
 
-        @ApiModelProperty(example = "null", value = "Order Status")
-        @JsonProperty("status") var status: Order.Status? = null,
+    @ApiModelProperty(example = "null", value = "Order Status")
+    @JsonProperty("status") var status: Order.Status? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("complete") var complete: kotlin.Boolean? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("complete") var complete: kotlin.Boolean? = null
 ) {
 
     /**

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

@@ -23,27 +23,27 @@ import io.swagger.annotations.ApiModelProperty
  * @param tags 
  * @param status pet status in the store
  */
-data class Pet (
+data class Pet(
 
-        @get:NotNull 
-        @ApiModelProperty(example = "doggie", required = true, value = "")
-        @JsonProperty("name") var name: kotlin.String,
+    @get:NotNull 
+    @ApiModelProperty(example = "doggie", required = true, value = "")
+    @JsonProperty("name") var name: kotlin.String,
 
-        @get:NotNull 
-        @ApiModelProperty(example = "null", required = true, value = "")
-        @JsonProperty("photoUrls") var photoUrls: kotlin.collections.List<kotlin.String>,
+    @get:NotNull 
+    @ApiModelProperty(example = "null", required = true, value = "")
+    @JsonProperty("photoUrls") var photoUrls: kotlin.collections.List<kotlin.String>,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") var id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") var id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("category") var category: Category? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("category") var category: Category? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("tags") var tags: kotlin.collections.List<Tag>? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("tags") var tags: kotlin.collections.List<Tag>? = null,
 
-        @ApiModelProperty(example = "null", value = "pet status in the store")
-        @JsonProperty("status") var status: Pet.Status? = null
+    @ApiModelProperty(example = "null", value = "pet status in the store")
+    @JsonProperty("status") var status: Pet.Status? = null
 ) {
 
     /**

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

@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Tag (
+data class Tag(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") var id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") var id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") var name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") var name: kotlin.String? = null
 ) {
 
 }

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

@@ -22,31 +22,31 @@ import io.swagger.annotations.ApiModelProperty
  * @param phone 
  * @param userStatus User Status
  */
-data class User (
+data class User(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") var id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") var id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("username") var username: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("username") var username: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("firstName") var firstName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("firstName") var firstName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("lastName") var lastName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("lastName") var lastName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("email") var email: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("email") var email: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("password") var password: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("password") var password: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("phone") var phone: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("phone") var phone: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "User Status")
-        @JsonProperty("userStatus") var userStatus: kotlin.Int? = null
+    @ApiModelProperty(example = "null", value = "User Status")
+    @JsonProperty("userStatus") var userStatus: kotlin.Int? = null
 ) {
 
 }