java: use interface where possible: don't change class signature (IDEA-258910)

GitOrigin-RevId: 51c5c167d189e98a2c76aca78dec0459a30296f9

java/java-impl/src/com/intellij/refactoring/turnRefsToSuper/TurnRefsToSuperProcessorBase.java

@@ -269,7 +269,7 @@ public abstract class TurnRefsToSuperProcessorBase extends BaseRefactoringProces
           if (classReference.getParent() instanceof PsiReferenceList) {
             final PsiReferenceList referenceList = ((PsiReferenceList)ppparent.getParent());
             final PsiClass parentClass = PsiTreeUtil.getParentOfType(ref, PsiClass.class);
-            if (parentClass != null) {
+            if (parentClass != null && !parentClass.equals(myClass)) {
               if (referenceList.equals(parentClass.getExtendsList()) || referenceList.equals(parentClass.getImplementsList())) {
                 final PsiTypeElement[] typeParameterElements = refParameterList.getTypeParameterElements();
                 for (int i = 0; i < typeParameterElements.length; i++) {

java/java-tests/testData/refactoring/turnRefsToSuper/selfReference/after/Client.java

@@ -0,0 +1,2 @@
+interface SuperBar<T> { }
+interface Bar extends SuperBar<Bar> {}

java/java-tests/testData/refactoring/turnRefsToSuper/selfReference/before/Client.java

@@ -0,0 +1,2 @@
+interface SuperBar<T> { }
+interface Bar extends SuperBar<Bar> {}

java/java-tests/testSrc/com/intellij/java/refactoring/TurnRefsToSuperTest.java

@@ -55,6 +55,7 @@ public class TurnRefsToSuperTest extends LightMultiFileTestCase {
   public void testTryWithResources1() { doTest("Test.MyResourceImpl", "Test.MyResource", false); }
   public void testTryWithResources2() { doTest("Test.MyResourceImpl", "Test.MyResource", false); }
   public void testDifferentNumberOfParams() { doTest("Bar", "SuperBar", false); }
+  public void testSelfReference() { doTest("Bar", "SuperBar", false); }
 
   //todo[ann] fix and uncomment
   //public void testStaticCallArguments() throws Exception { doTest("Impl", "Int", false); }