Groovy - handling of @Synchronized annotation (#6562)

* Hacky handling of @synchronized annotation

* check for any annotation

* Check using TypeUtils.isOfClassType

Author: greg-at-moderne

rewrite-groovy/src/main/java/org/openrewrite/groovy/GroovyParserVisitor.java

@@ -674,7 +674,11 @@ class B {                               class B {
                         body = bodyVisitor.visit(method.getCode());
                     }
                 } else {
-                    body = bodyVisitor.visit(method.getCode());
+                    if (annotations.stream().anyMatch(a -> TypeUtils.isOfClassType(a.getAnnotationType().getType(), "groovy.transform.Synchronized"))) {
+                        body = bodyVisitor.visit(((SynchronizedStatement) method.getCode()).getCode());
+                    } else {
+                        body = bodyVisitor.visit(method.getCode());
+                    }
                 }
             }
 
@@ -2443,7 +2447,7 @@ private JRightPadded<Statement> convertTopLevelStatement(SourceUnit unit, ASTNod
 
     // The groovy compiler discards these annotations in favour of other transform annotations,
     // so they must be parsed by hand when found in source.
-    private static final Class<?>[] DISCARDED_TRANSFORM_ANNOTATIONS = {Canonical.class, Immutable.class};
+    private static final Class<?>[] DISCARDED_TRANSFORM_ANNOTATIONS = {Canonical.class, Immutable.class, groovy.transform.Synchronized.class};
 
     public List<J.Annotation> visitAndGetAnnotations(AnnotatedNode node, RewriteGroovyClassVisitor classVisitor) {
         if (node.getAnnotations().isEmpty()) {

rewrite-groovy/src/test/java/org/openrewrite/groovy/tree/AnnotationTest.java

@@ -268,4 +268,26 @@ void groovyTransformFieldFQNAnnotationOnVariableWithMethodInvocation() {
           )
         );
     }
+
+    @Issue("https://github.com/openrewrite/rewrite/issues/6319")
+    @Test
+    void synchronizedAnnotation() {
+        rewriteRun(
+          groovy(
+            """
+            package org.dummy
+            
+            import groovy.transform.Synchronized
+            
+            class Foo {
+            
+                @Synchronized
+                void bar() {
+                    println('Hello World')
+                }
+            }
+            """
+          )
+        );
+    }
 }