enforce useJakartaEe for jersey3, warn on misuse for jersey 2

Author: martin-mfg

bin/configs/java-jersey3-oneOf.yaml

@@ -5,4 +5,3 @@ inputSpec: modules/openapi-generator/src/test/resources/3_0/oneOf_additionalProp
 templateDir: modules/openapi-generator/src/main/resources/Java
 additionalProperties:
   hideGenerationTimestamp: true
-  useJakartaEe: true

bin/configs/java-jersey3.yaml

@@ -4,7 +4,6 @@ library: jersey3
 inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/Java
 additionalProperties:
-  useJakartaEe: true
   useBeanValidation: true
   artifactId: petstore-jersey3
   hideGenerationTimestamp: true

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

@@ -587,6 +587,9 @@ public void processOpts() {
             // The flag below should be set for all Java libraries, but the templates need to be ported
             // one by one for each library.
             supportsAdditionalPropertiesWithComposedSchema = true;
+            if (useJakartaEe) {
+                LOGGER.warn("Jersey 2 is not compatible with Jakarta EE. Please use Jersey 3 or set {} to false.", USE_JAKARTA_EE);
+            }
         } else if (libJersey3) {
             additionalProperties.put("jersey3", true);
             supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
@@ -603,6 +606,7 @@ public void processOpts() {
             // The flag below should be set for all Java libraries, but the templates need to be ported
             // one by one for each library.
             supportsAdditionalPropertiesWithComposedSchema = true;
+            applyJakartaPackage();
         } else if (libNative) {
             supportingFiles.add(new SupportingFile("ApiResponse.mustache", invokerFolder, "ApiResponse.java"));
             supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));