Merge e2e45e6385d74309833424401ceab0cc48137548 into d6c46342693205f0dae441b45742d9c85d41cf33

docs/generators/groovy.md

@@ -69,6 +69,8 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
 |useOneOfInterfaces|whether to use a java interface to describe a set of oneOf options, where each option is a class that implements the interface| |false|
 |withXml|whether to include support for application/xml content type and include XML annotations in the model (works with libraries that provide support for JSON and XML)| |false|
+|groupByResponseContentType| Group server or client methods by response content types. For example, when openapi operation produces one of "application/json" and "application/xml" content types will be generated only one method for both content types. Otherwise for each content type will be generated different method. **Available only for generatos with supportsDividingOperationsByContentType** | |true|
+|groupByRequestAndResponseContentType| Group server or client methods by request body and response content types. For example, when openapi operation consumes "application/json" and "application/xml" content type and also api response has content with the same content types, 2 different methods will be generated. The content of the request and response types will match. Otherwise, will be generated 4 methods - for each combination of request body content type and response content type. **Available only for generatos with supportsDividingOperationsByContentType** | |true|
 
 ## SUPPORTED VENDOR EXTENSIONS
 

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

@@ -366,4 +366,5 @@ public interface CodegenConfig {
 
     Set<String> getOpenapiGeneratorIgnoreList();
 
+    boolean supportsDividingOperationsByContentType();
 }

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

@@ -454,4 +454,17 @@ public class CodegenConstants {
     public static final String WAIT_TIME_OF_THREAD = "waitTimeMillis";
 
     public static final String USE_DEFAULT_VALUES_FOR_REQUIRED_VARS = "useDefaultValuesForRequiredVars";
+
+    public static final String GROUP_BY_RESPONSE_CONTENT_TYPE = "groupByResponseContentType";
+    public static final String GROUP_BY_RESPONSE_CONTENT_TYPE_DESC =
+        "Group server or client methods by response content types. "
+            + "For example, when openapi operation produces one of \"application/json\" and \"application/xml\" content types "
+            + "will be generated only one method for both content types. Otherwise for each content type will be generated different method.";
+
+    public static final String GROUP_BY_REQUEST_AND_RESPONSE_CONTENT_TYPE = "groupByRequestAndResponseContentType";
+    public static final String GROUP_BY_REQUEST_AND_RESPONSE_CONTENT_TYPE_DESC =
+        "Group server or client methods by request body and response content types. "
+        + "For example, when openapi operation consumes \"application/json\" and \"application/xml\" content type and also api response "
+        + "has content with the same content types, 2 different methods will be generated. The content of the request and response types will match. "
+        + "Otherwise, will be generated 4 methods - for each combination of request body content type and response content type.";
 }

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

@@ -333,6 +333,10 @@ public class DefaultCodegen implements CodegenConfig {
 
     // Whether to automatically hardcode params that are considered Constants by OpenAPI Spec
     @Setter protected boolean autosetConstants = false;
+    @Setter
+    protected boolean groupByRequestAndResponseContentType = true;
+    @Setter
+    protected boolean groupByResponseContentType = true;
 
     @Override
     public boolean getAddSuffixToDuplicateOperationNicknames() {
@@ -392,9 +396,10 @@ public class DefaultCodegen implements CodegenConfig {
         convertPropertyToBooleanAndWriteBack(CodegenConstants.DISALLOW_ADDITIONAL_PROPERTIES_IF_NOT_PRESENT, this::setDisallowAdditionalPropertiesIfNotPresent);
         convertPropertyToBooleanAndWriteBack(CodegenConstants.ENUM_UNKNOWN_DEFAULT_CASE, this::setEnumUnknownDefaultCase);
         convertPropertyToBooleanAndWriteBack(CodegenConstants.AUTOSET_CONSTANTS, this::setAutosetConstants);
+        convertPropertyToBooleanAndWriteBack(CodegenConstants.GROUP_BY_REQUEST_AND_RESPONSE_CONTENT_TYPE, this::setGroupByRequestAndResponseContentType);
+        convertPropertyToBooleanAndWriteBack(CodegenConstants.GROUP_BY_RESPONSE_CONTENT_TYPE, this::setGroupByResponseContentType);
     }
 
-
     /***
      * Preset map builder with commonly used Mustache lambdas.
      *
@@ -910,7 +915,7 @@ public class DefaultCodegen implements CodegenConfig {
      * @return the sanitized variable name for enum
      */
     public String toEnumVarName(String value, String datatype) {
-        if (value.length() == 0) {
+        if (value.isEmpty()) {
             return "EMPTY";
         }
 
@@ -1011,6 +1016,47 @@ public class DefaultCodegen implements CodegenConfig {
     @Override
     @SuppressWarnings("unused")
     public void preprocessOpenAPI(OpenAPI openAPI) {
+
+        if (supportsDividingOperationsByContentType() && openAPI.getPaths() != null && !openAPI.getPaths().isEmpty()) {
+
+            for (Map.Entry<String, PathItem> entry : openAPI.getPaths().entrySet()) {
+                String pathStr = entry.getKey();
+                PathItem path = entry.getValue();
+                List<Operation> getOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.GET, path.getGet());
+                if (!getOps.isEmpty()) {
+                    path.addExtension("x-get", getOps);
+                }
+                List<Operation> putOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.PUT, path.getPut());
+                if (!putOps.isEmpty()) {
+                    path.addExtension("x-put", putOps);
+                }
+                List<Operation> postOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.POST, path.getPost());
+                if (!postOps.isEmpty()) {
+                    path.addExtension("x-post", postOps);
+                }
+                List<Operation> deleteOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.DELETE, path.getDelete());
+                if (!deleteOps.isEmpty()) {
+                    path.addExtension("x-delete", deleteOps);
+                }
+                List<Operation> optionsOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.OPTIONS, path.getOptions());
+                if (!optionsOps.isEmpty()) {
+                    path.addExtension("x-options", optionsOps);
+                }
+                List<Operation> headOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.HEAD, path.getHead());
+                if (!headOps.isEmpty()) {
+                    path.addExtension("x-head", headOps);
+                }
+                List<Operation> patchOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.PATCH, path.getPatch());
+                if (!patchOps.isEmpty()) {
+                    path.addExtension("x-patch", patchOps);
+                }
+                List<Operation> traceOps = divideOperationsByContentType(openAPI, pathStr, PathItem.HttpMethod.TRACE, path.getTrace());
+                if (!traceOps.isEmpty()) {
+                    path.addExtension("x-trace", traceOps);
+                }
+            }
+        }
+
         if (useOneOfInterfaces && openAPI.getComponents() != null) {
             // we process the openapi schema here to find oneOf schemas and create interface models for them
             Map<String, Schema> schemas = new HashMap<>(openAPI.getComponents().getSchemas());
@@ -1092,6 +1138,261 @@ public class DefaultCodegen implements CodegenConfig {
         }
     }
 
+    private List<Operation> divideOperationsByContentType(OpenAPI openAPI, String path, PathItem.HttpMethod httpMethod, Operation op) {
+
+        if (op == null) {
+            return Collections.emptyList();
+        }
+
+        var operationIndexes = new HashMap<String, Integer>();
+        operationIndexes.put(getOrGenerateOperationId(op, path, httpMethod.name()), 0);
+
+        var additionalOps = new ArrayList<Operation>();
+        divideOperationByRequestBody(openAPI, path, httpMethod, op, additionalOps, operationIndexes);
+
+        // Check responses content types and divide operations by them
+
+        var responses = op.getResponses();
+        if (responses == null || responses.isEmpty()) {
+            return additionalOps;
+        }
+        var unwrappedResponses = new ApiResponses();
+        var allPossibleContentTypes = new ArrayList<String>();
+        for (var responseEntry : responses.entrySet()) {
+            var apiResponse = ModelUtils.getReferencedApiResponse(openAPI, responseEntry.getValue());
+            unwrappedResponses.put(responseEntry.getKey(), apiResponse);
+            if (apiResponse.getContent() == null) {
+                continue;
+            }
+            for (var contentType : apiResponse.getContent().keySet()) {
+                contentType = contentType.toLowerCase();
+                if (!allPossibleContentTypes.contains(contentType)) {
+                    allPossibleContentTypes.add(contentType);
+                }
+            }
+        }
+        if (allPossibleContentTypes.isEmpty() || allPossibleContentTypes.size() == 1) {
+            return additionalOps;
+        }
+        op.setResponses(unwrappedResponses);
+        responses = unwrappedResponses;
+
+        var apiResponsesByContentType = new HashMap<String, ApiResponses>();
+        for (var contentType : allPossibleContentTypes) {
+            var apiResponses = new ApiResponses();
+            for (var responseEntry : responses.entrySet()) {
+                var code = responseEntry.getKey();
+                var response = responseEntry.getValue();
+                if (response.getContent() == null) {
+                    continue;
+                }
+                var mediaType = response.getContent().get(contentType);
+                if (mediaType == null) {
+                    continue;
+                }
+                apiResponses.addApiResponse(code, new ApiResponse()
+                    .description(response.getDescription())
+                    .headers(response.getHeaders())
+                    .links(response.getLinks())
+                    .extensions(response.getExtensions() != null ? new LinkedHashMap<>(response.getExtensions()) : new LinkedHashMap<>())
+                    .$ref(response.get$ref())
+                    .content(new Content()
+                        .addMediaType(contentType, mediaType)
+                    )
+                );
+            }
+            apiResponsesByContentType.put(contentType, apiResponses);
+        }
+
+        var addedContentTypes = new ArrayList<String>();
+        var finalAdditionalOps = new ArrayList<Operation>();
+        divideOperationByResponses(path, httpMethod, op, apiResponsesByContentType, finalAdditionalOps, addedContentTypes, operationIndexes);
+        for (var additionalOp : additionalOps) {
+            finalAdditionalOps.add(additionalOp);
+            divideOperationByResponses(path, httpMethod, additionalOp, apiResponsesByContentType, finalAdditionalOps, addedContentTypes, operationIndexes);
+        }
+
+        // remove correct processed contentTypes
+        apiResponsesByContentType.entrySet().removeIf(stringMediaTypeEntry -> addedContentTypes.contains(stringMediaTypeEntry.getKey()));
+
+        if (!apiResponsesByContentType.isEmpty()) {
+            appendCommonResponseMediaTypes(op, apiResponsesByContentType.values());
+            for (var additionalOp : additionalOps) {
+                appendCommonResponseMediaTypes(additionalOp, apiResponsesByContentType.values());
+            }
+        }
+
+        return finalAdditionalOps;
+    }
+
+    private void divideOperationByRequestBody(OpenAPI openAPI, String path, PathItem.HttpMethod httpMethod, Operation op,
+                                              List<Operation> additionalOps, Map<String, Integer> operationIndexes) {
+        RequestBody body = ModelUtils.getReferencedRequestBody(openAPI, op.getRequestBody());
+        if (body == null || body.getContent() == null) {
+            return;
+        }
+        op.setRequestBody(body);
+        Content content = body.getContent();
+        if (content.size() <= 1) {
+            return;
+        }
+        var firstEntry = content.entrySet().iterator().next();
+        var mediaTypesToRemove = new ArrayList<String>();
+        for (var entry : content.entrySet()) {
+            var contentType = entry.getKey();
+            MediaType mediaType = entry.getValue();
+            if (mediaTypesToRemove.contains(contentType) || contentType.equals(firstEntry.getKey())) {
+                continue;
+            }
+            var foundSameOpSignature = false;
+            // group by response content type
+            if (groupByResponseContentType) {
+                if (firstEntry.getValue().equals(mediaType)) {
+                    if (!groupByRequestAndResponseContentType) {
+                        foundSameOpSignature = true;
+                    }
+                } else {
+                    for (var additionalOp : additionalOps) {
+                        RequestBody additionalBody = ModelUtils.getReferencedRequestBody(openAPI, additionalOp.getRequestBody());
+                        if (additionalBody == null || additionalBody.getContent() == null) {
+                            return;
+                        }
+                        for (var addContentEntry : additionalBody.getContent().entrySet()) {
+                            if (addContentEntry.getValue().equals(mediaType)) {
+                                foundSameOpSignature = true;
+                                break;
+                            }
+                        }
+                        if (foundSameOpSignature) {
+                            additionalBody.getContent().put(contentType, mediaType);
+                            break;
+                        }
+                    }
+                }
+            }
+
+            if (groupByResponseContentType && foundSameOpSignature) {
+                continue;
+            }
+            mediaTypesToRemove.add(contentType);
+
+            var apiResponsesCopy = new ApiResponses();
+            apiResponsesCopy.putAll(op.getResponses());
+
+            additionalOps.add(new Operation()
+                .deprecated(op.getDeprecated())
+                .callbacks(op.getCallbacks())
+                .description(op.getDescription())
+                .extensions(op.getExtensions() != null ? new LinkedHashMap<>(op.getExtensions()) : new LinkedHashMap<>())
+                .externalDocs(op.getExternalDocs())
+                .operationId(calcOperationId(path, httpMethod, op, operationIndexes))
+                .parameters(op.getParameters())
+                .responses(apiResponsesCopy)
+                .security(op.getSecurity())
+                .servers(op.getServers())
+                .summary(op.getSummary())
+                .tags(op.getTags())
+                .requestBody(new RequestBody()
+                    .description(body.getDescription())
+                    .extensions(body.getExtensions())
+                    .content(new Content()
+                        .addMediaType(contentType, mediaType))
+                )
+            );
+        }
+        if (!mediaTypesToRemove.isEmpty()) {
+            content.entrySet().removeIf(stringMediaTypeEntry -> mediaTypesToRemove.contains(stringMediaTypeEntry.getKey()));
+        }
+    }
+
+    private String calcOperationId(String path, PathItem.HttpMethod httpMethod, Operation op, Map<String, Integer> operationIndexes) {
+        var operationId = getOrGenerateOperationId(op, path, httpMethod.name());
+        var index = operationIndexes.get(operationId);
+        if (index != null) {
+            index++;
+            operationId += "_" + index;
+            operationIndexes.put(operationId, index);
+        } else {
+            operationIndexes.put(operationId, 0);
+        }
+        return operationId;
+    }
+
+    private void divideOperationByResponses(
+        String path,
+        PathItem.HttpMethod httpMethod,
+        Operation op,
+        Map<String, ApiResponses> apiResponsesByContentType,
+        List<Operation> additionalOps,
+        List<String> addedContentTypes,
+        Map<String, Integer> operationIndexes
+    ) {
+
+        if (!groupByResponseContentType) {
+            return;
+        }
+
+        var isFirst = true;
+        for (var entry : apiResponsesByContentType.entrySet()) {
+            var contentType = entry.getKey();
+            var apiResponses = entry.getValue();
+            var requestBody = op.getRequestBody();
+            // group by requestBody contentType
+            if (groupByRequestAndResponseContentType
+                && requestBody != null
+                && requestBody.getContent() != null
+                && !requestBody.getContent().containsKey(contentType)) {
+                continue;
+            }
+            addedContentTypes.add(contentType);
+            if (isFirst) {
+                op.setResponses(apiResponses);
+                isFirst = false;
+                continue;
+            }
+
+            additionalOps.add(new Operation()
+                .deprecated(op.getDeprecated())
+                .callbacks(op.getCallbacks())
+                .description(op.getDescription())
+                .extensions(op.getExtensions())
+                .externalDocs(op.getExternalDocs())
+                .operationId(calcOperationId(path, httpMethod, op, operationIndexes))
+                .parameters(op.getParameters())
+                .responses(apiResponses)
+                .security(op.getSecurity())
+                .servers(op.getServers())
+                .summary(op.getSummary())
+                .tags(op.getTags())
+                .requestBody(requestBody)
+            );
+        }
+    }
+
+    private void appendCommonResponseMediaTypes(Operation op, Collection<ApiResponses> commonResponsesList) {
+        if (commonResponsesList.isEmpty()) {
+            return;
+        }
+
+        for (var commonResponses : commonResponsesList) {
+            var adOpResponses = op.getResponses();
+            for (var responseEntry : adOpResponses.entrySet()) {
+                var content = responseEntry.getValue().getContent();
+                var commonResponse = commonResponses.get(responseEntry.getKey());
+                if (commonResponse != null && commonResponse.getContent() != null) {
+                    if (content == null) {
+                        content = new Content();
+                    }
+                    for (var commonResponseEntry : commonResponse.getContent().entrySet()) {
+                        if (!content.containsKey(commonResponseEntry.getKey())) {
+                            content.addMediaType(commonResponseEntry.getKey(), commonResponseEntry.getValue());
+                        }
+                    }
+                }
+            }
+        }
+    }
+
     // override with any special handling of the entire OpenAPI spec document
     @Override
     @SuppressWarnings("unused")
@@ -1191,8 +1492,7 @@ public class DefaultCodegen implements CodegenConfig {
      */
     @Override
     public String escapeUnsafeCharacters(String input) {
-        LOGGER.warn("escapeUnsafeCharacters should be overridden in the code generator with proper logic to escape " +
-                "unsafe characters");
+        LOGGER.warn("escapeUnsafeCharacters should be overridden in the code generator with proper logic to escape unsafe characters");
         // doing nothing by default and code generator should implement
         // the logic to prevent code injection
         // later we'll make this method abstract to make sure
@@ -1208,8 +1508,7 @@ public class DefaultCodegen implements CodegenConfig {
      */
     @Override
     public String escapeQuotationMark(String input) {
-        LOGGER.warn("escapeQuotationMark should be overridden in the code generator with proper logic to escape " +
-                "single/double quote");
+        LOGGER.warn("escapeQuotationMark should be overridden in the code generator with proper logic to escape single/double quote");
         return input.replace("\"", "\\\"");
     }
 
@@ -1782,6 +2081,12 @@ public class DefaultCodegen implements CodegenConfig {
         // option to change the order of form/body parameter
         cliOptions.add(CliOption.newBoolean(CodegenConstants.PREPEND_FORM_OR_BODY_PARAMETERS,
                 CodegenConstants.PREPEND_FORM_OR_BODY_PARAMETERS_DESC).defaultValue(Boolean.FALSE.toString()));
+        if (supportsDividingOperationsByContentType()) {
+            cliOptions.add(CliOption.newBoolean(CodegenConstants.GROUP_BY_RESPONSE_CONTENT_TYPE,
+                CodegenConstants.GROUP_BY_RESPONSE_CONTENT_TYPE_DESC).defaultValue(Boolean.TRUE.toString()));
+            cliOptions.add(CliOption.newBoolean(CodegenConstants.GROUP_BY_REQUEST_AND_RESPONSE_CONTENT_TYPE,
+                CodegenConstants.GROUP_BY_REQUEST_AND_RESPONSE_CONTENT_TYPE_DESC).defaultValue(Boolean.TRUE.toString()));
+        }
 
         // option to change how we process + set the data in the discriminator mapping
         CliOption legacyDiscriminatorBehaviorOpt = CliOption.newBoolean(CodegenConstants.LEGACY_DISCRIMINATOR_BEHAVIOR, CodegenConstants.LEGACY_DISCRIMINATOR_BEHAVIOR_DESC).defaultValue(Boolean.TRUE.toString());
@@ -8591,11 +8896,16 @@ public class DefaultCodegen implements CodegenConfig {
         return false;
     }
 
-    /*
-        A function to convert yaml or json ingested strings like property names
-        And convert special characters like newline, tab, carriage return
-        Into strings that can be rendered in the language that the generator will output to
-        */
+    @Override
+    public boolean supportsDividingOperationsByContentType() {
+        return false;
+    }
+
+    /**
+     * A function to convert yaml or json ingested strings like property names
+     * And convert special characters like newline, tab, carriage return
+     * Into strings that can be rendered in the language that the generator will output to
+     */
     protected String handleSpecialCharacters(String name) {
         return name;
     }

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

@@ -606,10 +606,10 @@ public class DefaultGenerator implements Generator {
             if (!processedModels.contains(key) && allSchemas.containsKey(key)) {
                 generateModels(files, allModels, unusedModels, aliasModels, processedModels, () -> Set.of(key));
             } else {
-                LOGGER.info("Type " + variable.getComplexType() + " of variable " + variable.getName() + " could not be resolve because it is not declared as a model.");
+                LOGGER.info("Type {} of variable {} could not be resolve because it is not declared as a model.", variable.getComplexType(), variable.getName());
             }
         } else {
-            LOGGER.info("Type " + variable.getOpenApiType() + " of variable " + variable.getName() + " could not be resolve because it is not declared as a model.");
+            LOGGER.info("Type {} of variable {} could not be resolve because it is not declared as a model.", variable.getComplexType(), variable.getName());
         }
     }
 
@@ -1002,7 +1002,7 @@ public class DefaultGenerator implements Generator {
         File ignoreFile = new File(ignoreFileNameTarget);
         // use the entries provided by the users to pre-populate .openapi-generator-ignore
         try {
-            LOGGER.info("Writing file " + ignoreFileNameTarget + " (which is always overwritten when the option `openapiGeneratorIgnoreFile` is enabled.)");
+            LOGGER.info("Writing file {} (which is always overwritten when the option `openapiGeneratorIgnoreFile` is enabled.)", ignoreFileNameTarget);
             new File(config.outputFolder()).mkdirs();
             if (!ignoreFile.createNewFile()) {
                 // file may already exist, do nothing
@@ -1465,6 +1465,9 @@ public class DefaultGenerator implements Generator {
         if (paths == null) {
             return ops;
         }
+
+        var divideOperationsByContentType = config.supportsDividingOperationsByContentType();
+
         for (Map.Entry<String, PathItem> pathsEntry : paths.entrySet()) {
             String resourcePath = pathsEntry.getKey();
             PathItem path = pathsEntry.getValue();
@@ -1476,11 +1479,35 @@ public class DefaultGenerator implements Generator {
             processOperation(resourcePath, "patch", path.getPatch(), ops, path);
             processOperation(resourcePath, "options", path.getOptions(), ops, path);
             processOperation(resourcePath, "trace", path.getTrace(), ops, path);
+
+            if (divideOperationsByContentType) {
+                processAdditionalOperations(resourcePath, "x-get", "get", ops, path);
+                processAdditionalOperations(resourcePath, "x-head", "head", ops, path);
+                processAdditionalOperations(resourcePath, "x-put", "put", ops, path);
+                processAdditionalOperations(resourcePath, "x-post", "post", ops, path);
+                processAdditionalOperations(resourcePath, "x-delete", "delete", ops, path);
+                processAdditionalOperations(resourcePath, "x-patch", "patch", ops, path);
+                processAdditionalOperations(resourcePath, "x-options", "options", ops, path);
+                processAdditionalOperations(resourcePath, "x-trace", "trace", ops, path);
+            }
         }
         return ops;
     }
 
-    public Map<String, List<CodegenOperation>> processWebhooks(Map<String, PathItem> webhooks) {
+    protected void processAdditionalOperations(String resourcePath, String extName, String httpMethod, Map<String, List<CodegenOperation>> ops, PathItem path) {
+        if (path.getExtensions() == null || !path.getExtensions().containsKey(extName)) {
+            return;
+        }
+        var xOps = (List<Operation>) path.getExtensions().get(extName);
+        if (xOps == null) {
+            return;
+        }
+        for (Operation op : xOps) {
+            processOperation(resourcePath, httpMethod, op, ops, path);
+        }
+    }
+
+    public Map<String, List<CodegenOperation>>  processWebhooks(Map<String, PathItem> webhooks) {
         Map<String, List<CodegenOperation>> ops = new TreeMap<>();
         // when input file is not valid and doesn't contain any paths
         if (webhooks == null) {

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

@@ -2461,4 +2461,9 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
             throw new RuntimeException(sb.toString());
         }
     }
+
+    @Override
+    public boolean supportsDividingOperationsByContentType() {
+        return true;
+    }
 }

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

@@ -27,6 +27,7 @@ import lombok.Setter;
 import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
+import org.openapitools.codegen.config.GlobalSettings;
 import org.openapitools.codegen.model.ModelMap;
 import org.openapitools.codegen.model.ModelsMap;
 import org.openapitools.codegen.templating.mustache.EscapeChar;
@@ -1157,4 +1158,9 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
             }
         }
     }
+
+    @Override
+    public boolean supportsDividingOperationsByContentType() {
+        return true;
+    }
 }

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

@@ -1004,7 +1004,7 @@ public class SpringCodegen extends AbstractJavaCodegen
 
         // add Pageable import only if x-spring-paginated explicitly used
         // this allows to use a custom Pageable schema without importing Spring Pageable.
-        if (Boolean.TRUE.equals(operation.getExtensions().get("x-spring-paginated"))) {
+        if (operation.getExtensions() != null && Boolean.TRUE.equals(operation.getExtensions().get("x-spring-paginated"))) {
             importMapping.put("Pageable", "org.springframework.data.domain.Pageable");
         }
 
@@ -1093,7 +1093,7 @@ public class SpringCodegen extends AbstractJavaCodegen
 
     private Set<String> reformatProvideArgsParams(Operation operation) {
         Set<String> provideArgsClassSet = new HashSet<>();
-        Object argObj = operation.getExtensions().get("x-spring-provide-args");
+        Object argObj = operation.getExtensions() != null ? operation.getExtensions().get("x-spring-provide-args") : null;
         if (argObj instanceof List) {
             List<String> provideArgs = (List<String>) argObj;
             if (!provideArgs.isEmpty()) {
@@ -1122,7 +1122,7 @@ public class SpringCodegen extends AbstractJavaCodegen
                         formattedArgs.add(newArg);
                     }
                 }
-                operation.getExtensions().put("x-spring-provide-args", formattedArgs);
+                operation.addExtension("x-spring-provide-args", formattedArgs);
             }
         }
         return provideArgsClassSet;

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/micronaut/JavaMicronautClientCodegenTest.java

@@ -20,7 +20,6 @@ import static java.util.stream.Collectors.groupingBy;
 import static org.openapitools.codegen.TestUtils.newTempFolder;
 import static org.testng.Assert.assertEquals;
 
-
 public class JavaMicronautClientCodegenTest extends AbstractMicronautCodegenTest {
     @Test
     public void clientOptsUnicity() {
@@ -326,13 +325,13 @@ public class JavaMicronautClientCodegenTest extends AbstractMicronautCodegenTest
     public void shouldGenerateCorrectXmlAnnotations() {
         // Arrange
         final CodegenConfigurator config = new CodegenConfigurator()
-                .addAdditionalProperty(CodegenConstants.WITH_XML, true)
-                .addGlobalProperty(CodegenConstants.MODELS, "Pet")
-                .addGlobalProperty(CodegenConstants.MODEL_DOCS, null)
-                .addGlobalProperty(CodegenConstants.MODEL_TESTS, null)
-                .setGeneratorName(JavaMicronautClientCodegen.NAME)
-                .setInputSpec("src/test/resources/3_0/java/xml-annotations-test.yaml")
-                .setOutputDir(newTempFolder().toString());
+            .addAdditionalProperty(CodegenConstants.WITH_XML, true)
+            .addGlobalProperty(CodegenConstants.MODELS, "Pet")
+            .addGlobalProperty(CodegenConstants.MODEL_DOCS, null)
+            .addGlobalProperty(CodegenConstants.MODEL_TESTS, null)
+            .setGeneratorName(JavaMicronautClientCodegen.NAME)
+            .setInputSpec("src/test/resources/3_0/java/xml-annotations-test.yaml")
+            .setOutputDir(newTempFolder().toString());
 
         // Act
         final List<File> files = new DefaultGenerator().opts(config.toClientOptInput()).generate();
@@ -457,4 +456,320 @@ public class JavaMicronautClientCodegenTest extends AbstractMicronautCodegenTest
                 .hasAnnotation("JacksonXmlProperty", Map.of("localName", "\"item\""))
                 .hasAnnotation("JacksonXmlElementWrapper", Map.of("localName", "\"activities-array\""));
     }
+
+    @Test
+    public void testMultipleContentTypesToPathTrueTrue() {
+
+        var codegen = new JavaMicronautClientCodegen();
+        codegen.setGroupByRequestAndResponseContentType(true);
+        codegen.setGroupByResponseContentType(true);
+        String outputPath = generateFiles(codegen, "src/test/resources/3_0/java/multiple-content-types.yaml", CodegenConstants.APIS, CodegenConstants.MODELS);
+
+        assertFileContains(outputPath + "/src/main/java/org/openapitools/api/DefaultApi.java",
+            "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_1(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\", \"application/xml\", \"text/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_2(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/yaml\", \"text/json\"})\n" +
+                "    Mono<MySchema> myOp_3(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );"
+        );
+    }
+
+    @Test
+    public void testMultipleContentTypesToPathTrueFalse() {
+
+        var codegen = new JavaMicronautClientCodegen();
+        codegen.setGroupByRequestAndResponseContentType(true);
+        codegen.setGroupByResponseContentType(false);
+        String outputPath = generateFiles(codegen, "src/test/resources/3_0/java/multiple-content-types.yaml", CodegenConstants.APIS, CodegenConstants.MODELS);
+
+        assertFileContains(outputPath + "/src/main/java/org/openapitools/api/DefaultApi.java",
+            "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_1(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\", \"application/xml\", \"text/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_2(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\", \"application/xml\", \"text/json\"})\n" +
+                "    @Produces({\"application/yaml\"})\n" +
+                "    Mono<Coordinates> myOp_3(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"text/json\"})\n" +
+                "    Mono<MySchema> myOp_4(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );"
+        );
+    }
+
+    @Test
+    public void testMultipleContentTypesToPathFalseTrue() {
+
+        var codegen = new JavaMicronautClientCodegen();
+        codegen.setGroupByRequestAndResponseContentType(false);
+        codegen.setGroupByResponseContentType(true);
+        String outputPath = generateFiles(codegen, "src/test/resources/3_0/java/multiple-content-types.yaml", CodegenConstants.APIS, CodegenConstants.MODELS);
+
+        assertFileContains(outputPath + "/src/main/java/org/openapitools/api/DefaultApi.java",
+            "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp_1(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<MySchema> myOp_2(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/yaml\", \"text/json\"})\n" +
+                "    Mono<MySchema> myOp_3(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_4(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_5(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<MySchema> myOp_6(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_7(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_8(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<MySchema> myOp_9(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/yaml\", \"text/json\"})\n" +
+                "    Mono<Coordinates> myOp_10(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/yaml\", \"text/json\"})\n" +
+                "    Mono<Coordinates> myOp_11(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );"
+        );
+    }
+
+    @Test
+    public void testMultipleContentTypesToPathFalseFalse() {
+
+        var codegen = new JavaMicronautClientCodegen();
+        codegen.setGroupByRequestAndResponseContentType(false);
+        codegen.setGroupByResponseContentType(false);
+        String outputPath = generateFiles(codegen, "src/test/resources/3_0/java/multiple-content-types.yaml", CodegenConstants.APIS, CodegenConstants.MODELS);
+
+        assertFileContains(outputPath + "/src/main/java/org/openapitools/api/DefaultApi.java",
+            "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<Coordinates> myOp_1(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/json\"})\n" +
+                "    Mono<MySchema> myOp_2(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/yaml\"})\n" +
+                "    Mono<MySchema> myOp_3(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"text/json\"})\n" +
+                "    Mono<Coordinates> myOp_4(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"text/json\"})\n" +
+                "    Mono<Coordinates> myOp_5(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"text/json\"})\n" +
+                "    Mono<MySchema> myOp_6(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_7(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<Coordinates> myOp_8(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"application/xml\"})\n" +
+                "    Mono<MySchema> myOp_9(\n" +
+                "        @Body @Nullable @Valid Coordinates coordinates\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_10(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<Coordinates> myOp_11(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"text/json\"})\n" +
+                "    @Produces({\"multipart/form-data\"})\n" +
+                "    Mono<MySchema> myOp_12(\n" +
+                "        @Nullable @Valid Coordinates coordinates, \n" +
+                "        @Nullable File _file\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/xml\"})\n" +
+                "    @Produces({\"application/yaml\"})\n" +
+                "    Mono<Coordinates> myOp_13(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );",
+
+                "    @Post(uri=\"/multiplecontentpath\")\n" +
+                "    @Consumes({\"application/json\"})\n" +
+                "    @Produces({\"application/yaml\"})\n" +
+                "    Mono<Coordinates> myOp_14(\n" +
+                "        @Body @Nullable @Valid MySchema mySchema\n" +
+                "    );"
+        );
+    }
+
+    @Test
+    public void testMultipleContentTypesWithRefs() {
+
+        var codegen = new JavaMicronautClientCodegen();
+        codegen.setGroupByRequestAndResponseContentType(true);
+        codegen.setGroupByResponseContentType(true);
+        String outputPath = generateFiles(codegen, "src/test/resources/3_0/java/multiple-content-types-2.yaml", CodegenConstants.APIS, CodegenConstants.MODELS);
+
+        assertFileContains(outputPath + "/src/main/java/org/openapitools/api/DefaultApi.java",
+            ""
+        );
+    }
 }

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/micronaut/JavaMicronautServerCodegenTest.java

@@ -487,4 +487,5 @@ public class JavaMicronautServerCodegenTest extends AbstractMicronautCodegenTest
                 .hasAnnotation("JacksonXmlProperty", Map.of("localName", "\"item\""))
                 .hasAnnotation("JacksonXmlElementWrapper", Map.of("localName", "\"activities-array\""));
     }
+
 }

modules/openapi-generator/src/test/resources/3_0/java/multiple-content-types-2.yaml

@@ -0,0 +1,71 @@
+openapi: 3.0.3
+info:
+  version: "1"
+  title: Multiple Content Types for same request
+paths:
+  /pet:
+    post:
+      tags:
+        - pet
+      summary: Add a new pet to the store
+      description: ''
+      operationId: addPet
+      responses:
+        '200':
+          $ref: "#/components/responses/200"
+        '405':
+          description: Invalid input
+      security:
+        - petstore_auth:
+            - 'write:pets'
+            - 'read:pets'
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+components:
+  responses:
+    '200':
+      description: successful operation
+      content:
+        application/xml:
+          schema:
+            $ref: '#/components/schemas/Pet'
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Pet'
+        application/yaml:
+          schema:
+            $ref: '#/components/schemas/MySchema'
+  requestBodies:
+    Pet:
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Pet'
+        application/xml:
+          schema:
+            $ref: '#/components/schemas/Pet'
+        text/json:
+          schema:
+            $ref: '#/components/schemas/MySchema'
+      description: Pet object that needs to be added to the store
+      required: true
+  schemas:
+    MySchema:
+      type: object
+      properties:
+        id:
+          type: string
+    Pet:
+      title: a Pet
+      description: A pet for sale in the pet store
+      type: object
+      required:
+        - name
+        - photoUrls
+      properties:
+        id:
+          type: integer
+          format: int64
+        name:
+          type: string
+          example: doggie

modules/openapi-generator/src/test/resources/3_0/java/multiple-content-types.yaml

@@ -0,0 +1,67 @@
+openapi: 3.0.3
+info:
+  version: "1"
+  title: Multiple Content Types for same request
+paths:
+  /multiplecontentpath:
+    post:
+      operationId: myOp
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/coordinates'
+          application/xml:
+            schema:
+              $ref: '#/components/schemas/coordinates'
+          multipart/form-data:
+            schema:
+              type: object
+              properties:
+                coordinates:
+                  $ref: '#/components/schemas/coordinates'
+                file:
+                  type: string
+                  format: binary
+          application/yaml:
+            schema:
+              $ref: '#/components/schemas/MySchema'
+          text/json:
+            schema:
+              $ref: '#/components/schemas/MySchema'
+      responses:
+        201:
+          description: Successfully created
+          headers:
+            Location:
+              schema:
+                type: string
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/coordinates'
+            application/xml:
+              schema:
+                $ref: '#/components/schemas/coordinates'
+            text/json:
+              schema:
+                $ref: '#/components/schemas/MySchema'
+components:
+  schemas:
+    coordinates:
+      type: object
+      required:
+        - lat
+        - long
+      properties:
+        lat:
+          type: number
+        long:
+          type: number
+    MySchema:
+      type: object
+      required:
+        - lat
+      properties:
+        lat:
+          type: number