fixes #90

Author: springdoc

springdoc-openapi-common/src/main/java/org/springdoc/core/AbstractResponseBuilder.java

@@ -86,14 +86,10 @@ public void buildGenericResponse(Components components, Map<String, Object> find
 
 	protected Schema calculateSchemaParameterizedType(Components components, ParameterizedType parameterizedType) {
 		Schema schemaN = null;
-		if (parameterizedType.getActualTypeArguments()[0] instanceof Class
-				&& !Void.class.equals(parameterizedType.getActualTypeArguments()[0])) {
+		Type type = parameterizedType.getActualTypeArguments()[0];
+		if ((type instanceof Class || type instanceof ParameterizedType) && !Void.class.equals(type)) {
 			schemaN = calculateSchema(components, parameterizedType);
-		} else if (parameterizedType.getActualTypeArguments()[0] instanceof ParameterizedType
-				&& !Void.class.equals(parameterizedType.getActualTypeArguments()[0])) {
-			parameterizedType = (ParameterizedType) parameterizedType.getActualTypeArguments()[0];
-			schemaN = SpringDocAnnotationsUtils.extractSchema(components, parameterizedType);
-		} else if (Void.class.equals(parameterizedType.getActualTypeArguments()[0])) {
+		} else if (Void.class.equals(type)) {
 			// if void, no content
 			schemaN = AnnotationsUtils.resolveSchemaFromType(String.class, null, null);
 		}
@@ -127,9 +123,11 @@ private Map<String, ApiResponse> computeResponse(Components components, Method m
 				ApiResponse apiResponse1 = new ApiResponse();
 				apiResponse1.setDescription(apiResponse2.description());
 				io.swagger.v3.oas.annotations.media.Content[] contentdoc = apiResponse2.content();
-				SpringDocAnnotationsUtils.getContent(contentdoc, new String[0],
-						methodAttributes.getAllProduces() == null ? new String[0] : methodAttributes.getAllProduces(),
-						null, components, null)
+				SpringDocAnnotationsUtils
+						.getContent(contentdoc, new String[0],
+								methodAttributes.getAllProduces() == null ? new String[0]
+										: methodAttributes.getAllProduces(),
+								null, components, null)
 						.ifPresent(apiResponse1::content);
 				AnnotationsUtils.getHeaders(apiResponse2.headers(), null).ifPresent(apiResponse1::headers);
 				apiResponsesOp.addApiResponse(apiResponse2.responseCode(), apiResponse1);
@@ -221,8 +219,7 @@ private void setContent(String[] methodProduces, Content content,
 
 	private Schema calculateSchema(Components components, ParameterizedType parameterizedType) {
 		Schema schemaN;
-		schemaN = AnnotationsUtils.resolveSchemaFromType((Class<?>) parameterizedType.getActualTypeArguments()[0], null,
-				null);
+		schemaN = SpringDocAnnotationsUtils.extractSchema(components, parameterizedType.getActualTypeArguments()[0]);
 		if (schemaN.getType() == null) {
 			schemaN = SpringDocAnnotationsUtils.extractSchema(components,
 					parameterizedType.getActualTypeArguments()[0]);

springdoc-openapi-core/src/test/java/test/org/springdoc/api/app38/HelloController.java

@@ -0,0 +1,17 @@
+package test.org.springdoc.api.app38;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController("/api")
+public class HelloController {
+
+	@RequestMapping(value = "/npe_error", method = RequestMethod.GET)
+	public ResponseEntity<byte[]> getModelResource() {
+		return new ResponseEntity<>(new byte[0], HttpStatus.OK);
+	}
+
+}

springdoc-openapi-core/src/test/java/test/org/springdoc/api/app38/SpringDocApp38Test.java

@@ -0,0 +1,8 @@
+package test.org.springdoc.api.app38;
+
+import test.org.springdoc.api.AbstractSpringDocTest;
+
+public class SpringDocApp38Test extends AbstractSpringDocTest {
+
+
+}

springdoc-openapi-core/src/test/java/test/org/springdoc/api/app38/SpringDocTestApp.java

@@ -0,0 +1,12 @@
+package test.org.springdoc.api.app38;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringDocTestApp {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringDocTestApp.class, args);
+	}
+}

springdoc-openapi-core/src/test/resources/results/app38.json

@@ -0,0 +1,39 @@
+{
+   "openapi":"3.0.1",
+   "info":{
+      "title":"OpenAPI definition",
+      "version":"v0"
+   },
+   "servers":[
+      {
+         "url":"http://localhost",
+         "description":"Generated server url"
+      }
+   ],
+   "paths":{
+      "/npe_error":{
+         "get":{
+            "operationId":"getModelResource",
+            "responses":{
+               "200":{
+                  "description":"default response",
+                  "content":{
+                     "*/*":{
+                        "schema":{
+                           "type":"array",
+                           "items":{
+                              "type":"string",
+                              "format":"byte"
+                           }
+                        }
+                     }
+                  }
+               }
+            }
+         }
+      }
+   },
+   "components":{
+
+   }
+}