fix(kotlin): properly generate ByteArray property

springdoc-openapi-kotlin/src/main/java/org/springdoc/kotlin/SpringDocKotlinConfiguration.java

@@ -23,8 +23,10 @@
 package org.springdoc.kotlin;
 
 import com.fasterxml.jackson.module.kotlin.KotlinModule;
+import io.swagger.v3.oas.models.media.ByteArraySchema;
 import kotlin.Deprecated;
 import kotlin.coroutines.Continuation;
+import kotlin.jvm.internal.Intrinsics;
 import org.springdoc.core.providers.ObjectMapperProvider;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -51,7 +53,9 @@ public class SpringDocKotlinConfiguration {
 	 * @param objectMapperProvider the object mapper provider
 	 */
 	public SpringDocKotlinConfiguration(ObjectMapperProvider objectMapperProvider) {
-		getConfig().addRequestWrapperToIgnore(Continuation.class)
+		getConfig()
+				.addRequestWrapperToIgnore(Continuation.class)
+				.replaceWithSchema(byte[].class, new ByteArraySchema())
 				.addDeprecatedType(Deprecated.class);
 		objectMapperProvider.jsonMapper().registerModule( new KotlinModule.Builder().build());
 	}

springdoc-openapi-kotlin/src/test/kotlin/test/org/springdoc/api/app6/ByteArrayController.kt

@@ -0,0 +1,34 @@
+/*
+ *
+ *  * Copyright 2019-2022 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.app6
+
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+data class Foo(val data: ByteArray)
+
+@RestController
+@RequestMapping("/bytearray")
+class ByteArrayController {
+
+    @GetMapping("/")
+    fun getByteArray(): Foo = Foo(byteArrayOf(0))
+
+}

springdoc-openapi-kotlin/src/test/kotlin/test/org/springdoc/api/app6/SpringDocApp6Test.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.app6
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.context.annotation.ComponentScan
+import test.org.springdoc.api.AbstractKotlinSpringDocTest
+
+class SpringDocApp6Test : AbstractKotlinSpringDocTest() {
+
+	@SpringBootApplication
+	@ComponentScan(basePackages = ["org.springdoc", "test.org.springdoc.api.app6"])
+	open class DemoApplication
+
+}

springdoc-openapi-kotlin/src/test/resources/results/app6.json

@@ -0,0 +1,51 @@
+{
+  "openapi": "3.0.1",
+  "info": {
+    "title": "OpenAPI definition",
+    "version": "v0"
+  },
+  "servers": [
+    {
+      "url": "",
+      "description": "Generated server url"
+    }
+  ],
+  "paths": {
+    "/bytearray/": {
+      "get": {
+        "tags": [
+          "byte-array-controller"
+        ],
+        "operationId": "getByteArray",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/Foo"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Foo": {
+        "required": [
+          "data"
+        ],
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "string",
+            "format": "byte"
+          }
+        }
+      }
+    }
+  }
+}