Added support for non-nullable types in Kotlin. Fixes #443

Author: bnasslahsen

Diff for: springdoc-openapi-kotlin/pom.xml

@@ -14,6 +14,10 @@
 			<artifactId>springdoc-openapi-common</artifactId>
 			<version>${project.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.module</groupId>
+			<artifactId>jackson-module-kotlin</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>

Diff for: springdoc-openapi-kotlin/src/main/java/org/springdoc/core/SpringDocKotlinConfiguration.java

@@ -18,6 +18,8 @@
 
 package org.springdoc.core;
 
+import com.fasterxml.jackson.module.kotlin.KotlinModule;
+import io.swagger.v3.core.util.Json;
 import kotlin.Deprecated;
 import kotlin.coroutines.Continuation;
 
@@ -36,6 +38,7 @@ public class SpringDocKotlinConfiguration {
 	static {
 		getConfig().addRequestWrapperToIgnore(Continuation.class)
 		.addDeprecatedType(Deprecated.class);
+		Json.mapper().registerModule(new KotlinModule());
 	}
 
 	@Bean

Diff for: springdoc-openapi-kotlin/src/test/kotlin/test/org/springdoc/api/app4/HelloController.kt

@@ -0,0 +1,38 @@
+/*
+ *
+ *  * Copyright 2019-2020 the original author or 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.
+ *
+ */
+
+package test.org.springdoc.api.app4
+
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+
+data class Person(
+		val name: String,
+		val nickname: String?
+)
+
+@RestController
+@RequestMapping("/test")
+class HelloController {
+	@GetMapping
+	suspend fun index(s:Person) = Person("name","nickname")
+
+
+}

Diff for: springdoc-openapi-kotlin/src/test/kotlin/test/org/springdoc/api/app4/SpringDocApp4Test.kt

@@ -0,0 +1,31 @@
+/*
+ *
+ *  * Copyright 2019-2020 the original author or 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.
+ *
+ */
+
+package test.org.springdoc.api.app4
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.context.annotation.ComponentScan
+import test.org.springdoc.api.AbstractKotlinSpringDocTest
+
+@ComponentScan(basePackages = ["org.springdoc", "test.org.springdoc.api.app4"])
+class SpringDocApp4Test : AbstractKotlinSpringDocTest() {
+
+	@SpringBootApplication
+	open class DemoApplication
+
+}

Diff for: springdoc-openapi-kotlin/src/test/resources/results/app2.json

@@ -55,6 +55,9 @@
   "components": {
     "schemas": {
       "SystemStatusResponse": {
+        "required": [
+          "status"
+        ],
         "type": "object",
         "properties": {
           "status": {
@@ -67,4 +70,4 @@
       }
     }
   }
-}
+}

Diff for: springdoc-openapi-kotlin/src/test/resources/results/app3.json

@@ -56,6 +56,9 @@
   "components": {
     "schemas": {
       "SystemStatusResponse": {
+        "required": [
+          "status"
+        ],
         "type": "object",
         "properties": {
           "status": {

Diff for: springdoc-openapi-kotlin/src/test/resources/results/app4.json

@@ -0,0 +1,63 @@
+{
+  "openapi": "3.0.1",
+  "info": {
+    "title": "OpenAPI definition",
+    "version": "v0"
+  },
+  "servers": [
+    {
+      "url": "",
+      "description": "Generated server url"
+    }
+  ],
+  "paths": {
+    "/test": {
+      "get": {
+        "tags": [
+          "hello-controller"
+        ],
+        "operationId": "index",
+        "parameters": [
+          {
+            "name": "s",
+            "in": "query",
+            "required": true,
+            "schema": {
+              "$ref": "#/components/schemas/Person"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "default response",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/Person"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Person": {
+        "required": [
+          "name"
+        ],
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string"
+          },
+          "nickname": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}