feat(jackson3): add jackson3 support for Java Client generator - WebClient

bin/configs/java-restclient-springBoot4-jackson2.yaml

@@ -0,0 +1,10 @@
+generatorName: java
+outputDir: samples/client/petstore/java/restclient-springBoot4-jackson2
+library: restclient
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
+templateDir: modules/openapi-generator/src/main/resources/Java
+additionalProperties:
+  artifactId: petstore-restclient
+  hideGenerationTimestamp: "true"
+  containerDefaultToNull: "true"
+  useSpringBoot4: true

bin/configs/java-restclient-springBoot4-jackson3.yaml

@@ -0,0 +1,12 @@
+generatorName: java
+outputDir: samples/client/petstore/java/restclient-springBoot4-jackson3
+library: restclient
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
+templateDir: modules/openapi-generator/src/main/resources/Java
+additionalProperties:
+  artifactId: petstore-restclient
+  hideGenerationTimestamp: "true"
+  containerDefaultToNull: "true"
+  useSpringBoot4: true
+  useJackson3: true
+  openApiNullable: false

bin/configs/java-webclient-springBoot4-jackson3.yaml

@@ -0,0 +1,12 @@
+generatorName: java
+outputDir: samples/client/petstore/java/webclient-springBoot4-jackson3
+library: webclient
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
+templateDir: modules/openapi-generator/src/main/resources/Java
+additionalProperties:
+  artifactId: petstore-webclient
+  hideGenerationTimestamp: "true"
+  containerDefaultToNull: "true"
+  useSpringBoot4: true
+  useJackson3: true
+  openApiNullable: false

docs/generators/java-microprofile.md

@@ -97,6 +97,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useBeanValidation|Use BeanValidation API annotations| |false|
 |useEnumCaseInsensitive|Use `equalsIgnoreCase` when String for enum comparison| |false|
 |useGzipFeature|Send gzip-encoded requests| |false|
+|useJackson3|Set it in order to use jackson 3 dependencies (only allowed when `useSpringBoot4` is set and incompatible with `openApiNullable`).| |false|
 |useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
 |useOneOfDiscriminatorLookup|Use the discriminator's mapping in oneOf to speed up the model lookup. IMPORTANT: Validation (e.g. one and only one match in oneOf's schemas) will be skipped. Only jersey2, jersey3, native, okhttp-gson support this option.| |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|
@@ -107,6 +108,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useRxJava3|Whether to use the RxJava3 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
 |useSealedOneOfInterfaces|Generate the oneOf interfaces as sealed interfaces. Only supported for WebClient and RestClient.| |false|
 |useSingleRequestParameter|Setting this property to "true" will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter. ONLY native, jersey2, jersey3, okhttp-gson, microprofile, Spring RestClient, Spring WebClient support this option. Setting this property to "static" does the same as "true", but also makes the generated arguments class static with single parameter instantiation.| |false|
+|useSpringBoot4|Generate code and provide dependencies for use with Spring Boot 4.x.| |false|
 |useUnaryInterceptor|If true it will generate ResponseInterceptors using a UnaryOperator. This can be usefull for manipulating the request before it gets passed, for example doing your own decryption| |false|
 |webclientBlockingOperations|Making all WebClient operations blocking(sync). Note that if on operation 'x-webclient-blocking: false' then such operation won't be sync| |false|
 |withAWSV4Signature|whether to include AWS v4 signature support (only available for okhttp-gson library)| |false|

docs/generators/java.md

@@ -97,6 +97,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useBeanValidation|Use BeanValidation API annotations| |false|
 |useEnumCaseInsensitive|Use `equalsIgnoreCase` when String for enum comparison| |false|
 |useGzipFeature|Send gzip-encoded requests| |false|
+|useJackson3|Set it in order to use jackson 3 dependencies (only allowed when `useSpringBoot4` is set and incompatible with `openApiNullable`).| |false|
 |useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
 |useOneOfDiscriminatorLookup|Use the discriminator's mapping in oneOf to speed up the model lookup. IMPORTANT: Validation (e.g. one and only one match in oneOf's schemas) will be skipped. Only jersey2, jersey3, native, okhttp-gson support this option.| |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|
@@ -107,6 +108,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useRxJava3|Whether to use the RxJava3 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
 |useSealedOneOfInterfaces|Generate the oneOf interfaces as sealed interfaces. Only supported for WebClient and RestClient.| |false|
 |useSingleRequestParameter|Setting this property to "true" will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter. ONLY native, jersey2, jersey3, okhttp-gson, microprofile, Spring RestClient, Spring WebClient support this option. Setting this property to "static" does the same as "true", but also makes the generated arguments class static with single parameter instantiation.| |false|
+|useSpringBoot4|Generate code and provide dependencies for use with Spring Boot 4.x.| |false|
 |useUnaryInterceptor|If true it will generate ResponseInterceptors using a UnaryOperator. This can be usefull for manipulating the request before it gets passed, for example doing your own decryption| |false|
 |webclientBlockingOperations|Making all WebClient operations blocking(sync). Note that if on operation 'x-webclient-blocking: false' then such operation won't be sync| |false|
 |withAWSV4Signature|whether to include AWS v4 signature support (only available for okhttp-gson library)| |false|

flake.nix

@@ -13,7 +13,7 @@
         devShells.default = pkgs.mkShell
           {
             buildInputs = with pkgs;[
-              jdk11
+              jdk17
               maven
             ];
           };

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

@@ -47,6 +47,7 @@
 import static com.google.common.base.CaseFormat.LOWER_CAMEL;
 import static com.google.common.base.CaseFormat.UPPER_UNDERSCORE;
 import static java.util.Collections.sort;
+import static org.openapitools.codegen.CodegenConstants.SERIALIZATION_LIBRARY;
 import static org.openapitools.codegen.CodegenConstants.X_IMPLEMENTS;
 import static org.openapitools.codegen.utils.CamelizeOption.LOWERCASE_FIRST_LETTER;
 import static org.openapitools.codegen.utils.StringUtils.camelize;
@@ -117,6 +118,12 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     public static final String SERIALIZATION_LIBRARY_JACKSON = "jackson";
     public static final String SERIALIZATION_LIBRARY_JSONB = "jsonb";
 
+    public static final String USE_SPRING_BOOT4 = "useSpringBoot4";
+    public static final String USE_JACKSON_3 = "useJackson3";
+    private static final String JACKSON2_PACKAGE = "com.fasterxml.jackson";
+    private static final String JACKSON3_PACKAGE = "tools.jackson";
+    private static final String JACKSON_PACKAGE = "jacksonPackage";
+
     public static final String GENERATE_CLIENT_AS_BEAN = "generateClientAsBean";
 
     protected String gradleWrapperPackage = "gradle.wrapper";
@@ -134,7 +141,6 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     @Setter protected boolean microProfileRegisterExceptionMapper = true;
     @Setter protected String configKey = null;
     @Setter(AccessLevel.PRIVATE) protected boolean configKeyFromClassName = false;
-
     @Setter protected boolean asyncNative = false;
     @Setter protected boolean parcelableModel = false;
     @Setter protected boolean performBeanValidation = false;
@@ -158,6 +164,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
      * Serialization library.
      */
     @Getter protected String serializationLibrary = null;
+    @Getter @Setter protected boolean useSpringBoot4 = false;
+    @Getter @Setter protected boolean useJackson3 = false;
     @Setter protected boolean useOneOfDiscriminatorLookup = false; // use oneOf discriminator's mapping for model lookup
     protected String rootJavaEEPackage;
     protected Map<String, MpRestClientVersion> mpRestClientVersions = new LinkedHashMap<>();
@@ -298,8 +306,8 @@ public JavaClientCodegen() {
         serializationOptions.put(SERIALIZATION_LIBRARY_JSONB, "Use JSON-B as serialization library");
         serializationLibrary.setEnum(serializationOptions);
         cliOptions.add(serializationLibrary);
-
-        // Ensure the OAS 3.x discriminator mappings include any descendent schemas that allOf
+        cliOptions.add(CliOption.newBoolean(USE_SPRING_BOOT4, "Generate code and provide dependencies for use with Spring Boot 4.x.", useSpringBoot4));
+        cliOptions.add(CliOption.newBoolean(USE_JACKSON_3, "Set it in order to use jackson 3 dependencies (only allowed when `" + USE_SPRING_BOOT4 + "` is set and incompatible with `"+OPENAPI_NULLABLE+"`).", useJackson3));        // Ensure the OAS 3.x discriminator mappings include any descendent schemas that allOf
         // inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values,
         // and the discriminator mapping schemas in the OAS document.
         this.setLegacyDiscriminatorBehavior(false);
@@ -367,8 +375,29 @@ public void processOpts() {
         // default jackson unless overridden by setSerializationLibrary
         this.jackson = !additionalProperties.containsKey(CodegenConstants.SERIALIZATION_LIBRARY) ||
                 SERIALIZATION_LIBRARY_JACKSON.equals(additionalProperties.get(CodegenConstants.SERIALIZATION_LIBRARY));
-
         convertPropertyToBooleanAndWriteBack(CodegenConstants.USE_ONEOF_DISCRIMINATOR_LOOKUP, this::setUseOneOfDiscriminatorLookup);
+        convertPropertyToBooleanAndWriteBack(USE_JACKSON_3, this::setUseJackson3);
+        convertPropertyToBooleanAndWriteBack(USE_SPRING_BOOT4, this::setUseSpringBoot4);
+        if(isUseJackson3() && !isUseSpringBoot4()){
+            throw new IllegalArgumentException("useJackson3 is only available with Spring Boot >= 4");
+        }
+        if(isUseJackson3() && isOpenApiNullable()){
+            throw new IllegalArgumentException("openApiNullable cannot be set with useJackson3");
+        }
+
+        if(this.useJackson3){
+            this.applyJackson3Package();
+        } else {
+            this.applyJackson2Package();
+        }
+
+        if(this.useSpringBoot4) {
+            setUseJakartaEe(true);
+            applyJakartaPackage();
+        }
+
+        // override parent one
+        importMapping.put("JsonDeserialize", (useJackson3 ? JACKSON3_PACKAGE : JACKSON2_PACKAGE) + ".databind.annotation.JsonDeserialize");
 
         // RxJava
         if (additionalProperties.containsKey(USE_RX_JAVA2) && additionalProperties.containsKey(USE_RX_JAVA3)) {
@@ -790,8 +819,10 @@ public void processOpts() {
                 additionalProperties.remove(SERIALIZATION_LIBRARY_GSON);
                 additionalProperties.remove(SERIALIZATION_LIBRARY_JSONB);
                 supportingFiles.add(new SupportingFile("RFC3339DateFormat.mustache", invokerFolder, "RFC3339DateFormat.java"));
-                supportingFiles.add(new SupportingFile("RFC3339InstantDeserializer.mustache", invokerFolder, "RFC3339InstantDeserializer.java"));
-                supportingFiles.add(new SupportingFile("RFC3339JavaTimeModule.mustache", invokerFolder, "RFC3339JavaTimeModule.java"));
+                if (!useJackson3) {
+                    supportingFiles.add(new SupportingFile("RFC3339InstantDeserializer.mustache", invokerFolder, "RFC3339InstantDeserializer.java"));
+                    supportingFiles.add(new SupportingFile("RFC3339JavaTimeModule.mustache", invokerFolder, "RFC3339JavaTimeModule.java"));
+                }
                 break;
             case SERIALIZATION_LIBRARY_GSON:
                 additionalProperties.put(SERIALIZATION_LIBRARY_GSON, "true");
@@ -809,7 +840,7 @@ public void processOpts() {
                 additionalProperties.remove(SERIALIZATION_LIBRARY_JSONB);
                 break;
         }
-        
+
         if (isLibrary(FEIGN)) {
             additionalProperties.put("feign-okhttp", "true");
         } else if (isLibrary(FEIGN_HC5)) {
@@ -1028,6 +1059,7 @@ private static boolean isMultipartType(List<Map<String, String>> consumes) {
     @Override
     public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
         super.postProcessModelProperty(model, property);
+
         if (!model.isEnum) {
             //Needed imports for Jackson based libraries
             if (additionalProperties.containsKey(SERIALIZATION_LIBRARY_JACKSON)) {
@@ -1241,6 +1273,14 @@ public void setCaseInsensitiveResponseHeaders(final Boolean caseInsensitiveRespo
         this.caseInsensitiveResponseHeaders = caseInsensitiveResponseHeaders;
     }
 
+    protected void applyJackson2Package() {
+        writePropertyBack(JACKSON_PACKAGE, JACKSON2_PACKAGE);
+    }
+
+    protected void applyJackson3Package() {
+        writePropertyBack(JACKSON_PACKAGE, JACKSON3_PACKAGE);
+    }
+
     public void setSerializationLibrary(String serializationLibrary) {
         if (SERIALIZATION_LIBRARY_JACKSON.equalsIgnoreCase(serializationLibrary)) {
             this.serializationLibrary = SERIALIZATION_LIBRARY_JACKSON;
@@ -1281,7 +1321,7 @@ public String toApiVarName(String name) {
 
     @Override
     public void addImportsToOneOfInterface(List<Map<String, String>> imports) {
-        if(additionalProperties.containsKey(SERIALIZATION_LIBRARY_JACKSON)) {
+        if (additionalProperties.containsKey(SERIALIZATION_LIBRARY_JACKSON)) {
             for (String i : Arrays.asList("JsonSubTypes", "JsonTypeInfo", "JsonIgnoreProperties")) {
                 Map<String, String> oneImport = new HashMap<>();
                 oneImport.put("import", importMapping.get(i));

modules/openapi-generator/src/main/resources/Java/RFC3339DateFormat.mustache

@@ -1,7 +1,7 @@
 {{>licenseInfo}}
 package {{invokerPackage}};
 
-import com.fasterxml.jackson.databind.util.StdDateFormat;
+import {{jacksonPackage}}.databind.util.StdDateFormat;
 
 import java.text.DateFormat;
 import java.text.FieldPosition;