Fix consumes and produces calculation. Fixes #2596

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/models/MethodAttributes.java

@@ -25,18 +25,22 @@
 package org.springdoc.core.models;
 
 import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.Locale;
 import java.util.Map;
 
 import com.fasterxml.jackson.annotation.JsonView;
 import io.swagger.v3.oas.models.responses.ApiResponse;
 import io.swagger.v3.oas.models.responses.ApiResponses;
+import java.util.Set;
+import java.util.stream.Collectors;
 import org.apache.commons.lang3.ArrayUtils;
 import org.apache.commons.lang3.StringUtils;
 
+import org.jetbrains.annotations.Nullable;
 import org.springframework.core.annotation.AnnotatedElementUtils;
-import org.springframework.util.CollectionUtils;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -275,28 +279,38 @@ else if (reqMappingClass != null) {
 	 * @param headers the headers
 	 */
 	private void fillMethods(String[] produces, String[] consumes, String[] headers) {
-		if (ArrayUtils.isEmpty(methodProduces)) {
-			if (ArrayUtils.isNotEmpty(produces))
-				methodProduces = produces;
-			else if (ArrayUtils.isNotEmpty(classProduces))
-				methodProduces = classProduces;
-			else
-				methodProduces = new String[] { defaultProducesMediaType };
-		}
-
-		if (ArrayUtils.isEmpty(methodConsumes)) {
-			if (ArrayUtils.isNotEmpty(consumes))
-				methodConsumes = consumes;
-			else if (ArrayUtils.isNotEmpty(classConsumes))
-				methodConsumes = classConsumes;
-			else
-				methodConsumes = new String[] { defaultConsumesMediaType };
-		}
-
-		if (CollectionUtils.isEmpty(this.headers))
-			setHeaders(headers);
+        if (ArrayUtils.isNotEmpty(produces)) {
+            methodProduces = mergeArrays(methodProduces, produces);
+        } else if (ArrayUtils.isNotEmpty(classProduces)) {
+            methodProduces = mergeArrays(methodProduces, classProduces);
+        } else if (ArrayUtils.isEmpty(methodProduces)) {
+            methodProduces = new String[] {defaultProducesMediaType};
+        }
+
+        if (ArrayUtils.isNotEmpty(consumes)) {
+            methodConsumes = mergeArrays(methodConsumes, consumes);
+        } else if (ArrayUtils.isNotEmpty(classConsumes)) {
+            methodConsumes = mergeArrays(methodConsumes, classConsumes);
+        } else if (ArrayUtils.isEmpty(methodConsumes)) {
+            methodConsumes = new String[] {defaultConsumesMediaType};
+        }
+
+        setHeaders(headers);
 	}
 
+    /**
+	 * Merge string arrays into one array with unique values
+	 *
+	 * @param array1 the array1
+	 * @param array2 the array2
+	 * @return the string [ ]
+	 */
+    private String[] mergeArrays(@Nullable String[] array1, String[] array2) {
+        Set<String> uniqueValues = array1 == null ? new HashSet<>() : Arrays.stream(array1).collect(Collectors.toSet());
+        uniqueValues.addAll(Arrays.asList(array2));
+        return uniqueValues.toArray(new String[0]);
+    }
+
 	/**
 	 * Is method overloaded boolean.
 	 *

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v30/app219/HelloController.java

@@ -0,0 +1,42 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  * 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.v30.app219;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping(value = "/api", produces = {"application/xml"}, consumes = {"application/json"})
+public class HelloController {
+
+    @RequestMapping(value = "/testpost", method = RequestMethod.POST, produces = {"application/json"},
+            consumes = {"application/json;charset=UTF-8", "application/json; charset=UTF-8"})
+    public ResponseEntity<TestObject> testpost(@RequestBody TestObject dto) {
+        return ResponseEntity.ok(dto);
+    }
+}

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v30/app219/SpringDocApp219Test.java

@@ -0,0 +1,36 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  * 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.v30.app219;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.test.context.ActiveProfiles;
+import test.org.springdoc.api.v30.AbstractSpringDocV30Test;
+
+@ActiveProfiles("219")
+public class SpringDocApp219Test extends AbstractSpringDocV30Test {
+
+	@SpringBootApplication
+	static class SpringDocTestApp {}
+}

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v30/app219/TestObject.java

@@ -0,0 +1,49 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  * 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.v30.app219;
+
+import java.time.LocalDateTime;
+
+public class TestObject {
+	public String stringValue;
+
+	public LocalDateTime localDateTime;
+
+	public String getStringValue() {
+		return stringValue;
+	}
+
+	public void setStringValue(String stringValue) {
+		this.stringValue = stringValue;
+	}
+
+	public LocalDateTime getLocalDateTime() {
+		return localDateTime;
+	}
+
+	public void setLocalDateTime(LocalDateTime localDateTime) {
+		this.localDateTime = localDateTime;
+	}
+}