[Java][Client] Support primitives and arrays in oneOf

docs/generators/java.md

@@ -148,6 +148,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 ## LANGUAGE PRIMITIVES
 
 <ul class="column-ul">
+<li>BigDecimal</li>
 <li>Boolean</li>
 <li>Double</li>
 <li>Float</li>

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

@@ -47,6 +47,22 @@ public CodegenProperty getNot() {
         return not;
     }
 
+    public void setAllOf(List<CodegenProperty> allOf) {
+        this.allOf = allOf;
+    }
+
+    public void setOneOf(List<CodegenProperty> oneOf) {
+        this.oneOf = oneOf;
+    }
+
+    public void setAnyOf(List<CodegenProperty> anyOf) {
+        this.anyOf = anyOf;
+    }
+
+    public void setNot(CodegenProperty not) {
+        this.not = not;
+    }
+
     public String toString() {
         final StringBuilder sb = new StringBuilder("CodegenComposedSchemas{");
         sb.append("oneOf=").append(oneOf);

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

@@ -39,6 +39,7 @@
 
 import java.io.File;
 import java.util.*;
+import java.util.function.Predicate;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -190,6 +191,8 @@ public JavaClientCodegen() {
         modelPackage = "org.openapitools.client.model";
         rootJavaEEPackage = MICROPROFILE_REST_CLIENT_DEFAULT_ROOT_PACKAGE;
 
+        languageSpecificPrimitives.add("BigDecimal");
+
         // cliOptions default redefinition need to be updated
         updateOption(CodegenConstants.INVOKER_PACKAGE, this.getInvokerPackage());
         updateOption(CodegenConstants.ARTIFACT_ID, this.getArtifactId());
@@ -1019,6 +1022,16 @@ public CodegenModel fromModel(String name, Schema model) {
         return codegenModel;
     }
 
+    @Override
+    protected boolean needToImport(String type) {
+        // add import for BigDecimal explicitly since it is a primitive type
+        if("BigDecimal".equals(type)) {
+            return true;
+        }
+
+        return super.needToImport(type) && !type.contains(".");
+    }
+
     @Override
     public ModelsMap postProcessModelsEnum(ModelsMap objs) {
         objs = super.postProcessModelsEnum(objs);

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/anyof_model.mustache

@@ -70,7 +70,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
                 @Override
                 public {{classname}} read(JsonReader in) throws IOException {
                     Object deserialized = null;
-                    JsonObject jsonObject = elementAdapter.read(in).getAsJsonObject();
+                    JsonElement jsonElement = elementAdapter.read(in);
 
                     {{#useOneOfDiscriminatorLookup}}
                     {{#discriminator}}
@@ -80,7 +80,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
                     switch (discriminatorValue) {
                     {{#mappedModels}}
                         case "{{{mappingName}}}":
-                            deserialized = adapter{{modelName}}.fromJsonTree(jsonObject);
+                            deserialized = adapter{{modelName}}.fromJsonTree(jsonElement);
                             new{{classname}}.setActualInstance(deserialized);
                             return new{{classname}};
                     {{/mappedModels}}
@@ -94,10 +94,10 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
                     // deserialize {{{.}}}
                     try {
                         // validate the JSON object to see if any exception is thrown
-                        {{.}}.validateJsonObject(jsonObject);
+                        {{.}}.validateJsonElement(jsonElement);
                         log.log(Level.FINER, "Input data matches schema '{{{.}}}'");
                         {{classname}} ret = new {{classname}}();
-                        ret.setActualInstance(adapter{{.}}.fromJsonTree(jsonObject));
+                        ret.setActualInstance(adapter{{.}}.fromJsonTree(jsonElement));
                         return ret;
                     } catch (Exception e) {
                         // deserialization failed, continue
@@ -106,7 +106,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
 
                     {{/anyOf}}
 
-                    throw new IOException(String.format("Failed deserialization for {{classname}}: no class matched. JSON: %s", jsonObject.toString()));
+                    throw new IOException(String.format("Failed deserialization for {{classname}}: no class matched. JSON: %s", jsonElement.toString()));
                 }
             }.nullSafe();
         }
@@ -190,26 +190,26 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
     {{/anyOf}}
 
  /**
-  * Validates the JSON Object and throws an exception if issues found
+  * Validates the JSON Element and throws an exception if issues found
   *
-  * @param jsonObj JSON Object
-  * @throws IOException if the JSON Object is invalid with respect to {{classname}}
+  * @param jsonElement JSON Element
+  * @throws IOException if the JSON Element is invalid with respect to {{classname}}
   */
-  public static void validateJsonObject(JsonObject jsonObj) throws IOException {
+  public static void validateJsonElement(JsonElement jsonElement) throws IOException {
     // validate anyOf schemas one by one
     int validCount = 0;
     {{#anyOf}}
     // validate the json string with {{{.}}}
     try {
-      {{{.}}}.validateJsonObject(jsonObj);
+      {{{.}}}.validateJsonElement(jsonElement);
       return; // return earlier as at least one schema is valid with respect to the Json object
       //validCount++;
     } catch (Exception e) {
       // continue to the next one
     }
     {{/anyOf}}
     if (validCount == 0) {
-      throw new IOException(String.format("The JSON string is invalid for {{classname}} with anyOf schemas: {{#anyOf}}{{{.}}}{{^-last}}, {{/-last}}{{/anyOf}}. JSON: %s", jsonObj.toString()));
+      throw new IOException(String.format("The JSON string is invalid for {{classname}} with anyOf schemas: {{#anyOf}}{{{.}}}{{^-last}}, {{/-last}}{{/anyOf}}. JSON: %s", jsonElement.toString()));
     }
   }