fix(java-spring): handle UUID type in enum values generation

Author: renato-tv

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

@@ -2301,6 +2301,8 @@ public String toEnumValue(String value, String datatype) {
             return "new BigDecimal(\"" + value + "\")";
         } else if ("URI".equals(datatype)) {
             return "URI.create(\"" + escapeText(value) + "\")";
+        } else if ("UUID".equals(datatype)) {
+            return "UUID.fromString(\"" + escapeText(value) + "\")";
         } else {
             return "\"" + escapeText(value) + "\"";
         }

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java

@@ -3094,6 +3094,16 @@ public void contractWithResolvedInnerEnumContainsEnumConverter() throws IOExcept
                 .assertMethod("ponyTypeConverter");
     }
 
+    @Test
+    public void contractWithUuidEnumShouldGenerateValidEnum() throws IOException {
+        Map<String, File> output = generateFromContract("src/test/resources/3_0/enum_uuid.yaml", SPRING_BOOT);
+
+        JavaFileAssert.assertThat(output.get("ExampleUuidEnum.java"))
+                .fileContains("UUID.fromString(\"d6a8f2b0-1c34-4e56-a789-0abcdef12345\")")
+                .fileContains("UUID.fromString(\"e7b9c3d1-2d45-5f67-b890-1bcdef023456\")")
+                .fileContains("private final UUID value");
+    }
+
     @Test
     public void shouldUseTheSameTagNameForTheInterfaceAndTheMethod_issue11570() throws IOException {
         final Map<String, File> output = generateFromContract(

modules/openapi-generator/src/test/resources/3_0/enum_uuid.yaml

@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  title: Sample API
+  description: API with UUID enum.
+  version: 1.0.0
+paths:
+  /resources:
+    get:
+      summary: Returns resources.
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Resource'
+components:
+  schemas:
+    Resource:
+      type: object
+      properties:
+        source:
+          $ref: '#/components/schemas/ExampleUuidEnum'
+    ExampleUuidEnum:
+      type: string
+      format: uuid
+      description: Example of an Enum with UUID values
+      enum:
+        - "d6a8f2b0-1c34-4e56-a789-0abcdef12345"
+        - "e7b9c3d1-2d45-5f67-b890-1bcdef023456"