[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

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

@@ -940,7 +940,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
             }
         } else if (ModelUtils.isStringSchema(p)) {
             if (p.getDefault() != null) {
-                return "'" + p.getDefault() + "'";
+                return "\"" + p.getDefault() + "\"";
             }
         }
 

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/model/Category.kt

@@ -16,7 +16,7 @@ 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,

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

@@ -17,7 +17,7 @@ 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,

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

@@ -21,7 +21,7 @@ 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,

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

@@ -23,7 +23,7 @@ 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 = "")

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

@@ -16,7 +16,7 @@ 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,

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

@@ -22,7 +22,7 @@ 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,

samples/server/petstore/kotlin/vertx/.openapi-generator/VERSION

@@ -1 +1 @@
-4.2.1-SNAPSHOT
+4.3.1-SNAPSHOT

samples/server/petstore/kotlin/vertx/src/main/kotlin/org/openapitools/server/api/model/Pet.kt

@@ -20,10 +20,10 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties
 import com.fasterxml.jackson.annotation.JsonInclude
 /**
  * A pet for sale in the pet store
- * @param id 
- * @param category 
  * @param name 
  * @param photoUrls 
+ * @param id 
+ * @param category 
  * @param tags 
  * @param status pet status in the store
  */