Add support for diamond operator in Groovy Parser (#5783)

Author: jevanlingen

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

@@ -2516,15 +2516,10 @@ private <T extends TypeTree & Expression> T typeTree(@Nullable ClassNode classNo
                     && classNode.getUnresolvedSuperClass().isUsingGenerics()
                     && !classNode.getUnresolvedSuperClass().isGenericsPlaceHolder()
                     && classNode.getGenericsTypes() == null;
-            if (isAnonymousClassWithGenericSuper) {
+            if (isAnonymousClassWithGenericSuper || (classNode.isUsingGenerics() && !classNode.isGenericsPlaceHolder())) {
                 JContainer<Expression> typeParameters = inferredType ?
                         JContainer.build(sourceBefore("<"), singletonList(padRight(new J.Empty(randomId(), EMPTY, Markers.EMPTY), sourceBefore(">"))), Markers.EMPTY) :
-                        visitTypeParameterizations(classNode.getUnresolvedSuperClass().getGenericsTypes());
-                expr = new J.ParameterizedType(randomId(), EMPTY, Markers.EMPTY, (NameTree) expr, typeParameters, typeMapping.type(classNode));
-            } else if (classNode.isUsingGenerics() && !classNode.isGenericsPlaceHolder()) {
-                JContainer<Expression> typeParameters = inferredType ?
-                        JContainer.build(sourceBefore("<"), singletonList(padRight(new J.Empty(randomId(), EMPTY, Markers.EMPTY), sourceBefore(">"))), Markers.EMPTY) :
-                        visitTypeParameterizations(classNode.getGenericsTypes());
+                        visitTypeParameterizations(isAnonymousClassWithGenericSuper ? classNode.getUnresolvedSuperClass().getGenericsTypes() : classNode.getGenericsTypes());
                 expr = new J.ParameterizedType(randomId(), EMPTY, Markers.EMPTY, (NameTree) expr, typeParameters, typeMapping.type(classNode));
             }
         }
@@ -3100,7 +3095,7 @@ private boolean isInferred(ConstructorCallExpression ctor) {
 
         ClassNode innerClass = ctor.getType();
         if (!(innerClass instanceof InnerClassNode)) {
-            return false;
+            return innerClass.getGenericsTypes() != null && innerClass.getGenericsTypes().length == 0;
         }
 
         ClassNode superClass = innerClass.getUnresolvedSuperClass();

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

@@ -34,6 +34,28 @@ void inParens() {
         );
     }
 
+    @Test
+    void withGenerics() {
+        rewriteRun(
+          groovy(
+            """              
+              new ArrayList<String>()
+              """
+          )
+        );
+    }
+
+    @Test
+    void withDiamondOperator() {
+        rewriteRun(
+          groovy(
+            """
+              new ArrayList<>()
+              """
+          )
+        );
+    }
+
     @Test
     void declaration() {
         rewriteRun(