inheritance 2 delegation: type parameters substitution (IDEA-53529)

java/java-impl/src/com/intellij/refactoring/inheritanceToDelegation/InheritanceToDelegationProcessor.java

@@ -384,7 +384,9 @@ public class InheritanceToDelegationProcessor extends BaseRefactoringProcessor {
     if (!myIsInnerClassNeeded) return;
 
     PsiClass innerClass = myFactory.createClass(myInnerClassName);
-    final PsiJavaCodeReferenceElement baseClassReferenceElement = myFactory.createClassReferenceElement(myBaseClass);
+    final PsiSubstitutor superClassSubstitutor = TypeConversionUtil.getSuperClassSubstitutor(myBaseClass, myClass, PsiSubstitutor.EMPTY);
+    final PsiClassType superClassType = myFactory.createType(myBaseClass, superClassSubstitutor);
+    final PsiJavaCodeReferenceElement baseClassReferenceElement = myFactory.createReferenceElementByType(superClassType);
     if (!myBaseClass.isInterface()) {
       innerClass.getExtendsList().add(baseClassReferenceElement);
     } else {

java/java-tests/testData/refactoring/inheritanceToDelegation/typeParametersSubstitution/after/A.java

@@ -0,0 +1,8 @@
+public class A {
+    public final MyIntf myDelegate = new MyIntf();
+
+    private class MyIntf implements Intf<Integer> {
+        public void method1(Integer t) {
+        }
+    }
+}

java/java-tests/testData/refactoring/inheritanceToDelegation/typeParametersSubstitution/after/Intf.java

@@ -0,0 +1,3 @@
+public interface Intf<T> {
+    void method1(T t);
+}

java/java-tests/testData/refactoring/inheritanceToDelegation/typeParametersSubstitution/before/A.java

@@ -0,0 +1,4 @@
+public class A implements Intf<Integer> {
+    public void method1(Integer t) {
+    }
+}

java/java-tests/testData/refactoring/inheritanceToDelegation/typeParametersSubstitution/before/Intf.java

@@ -0,0 +1,3 @@
+public interface Intf<T> {
+    void method1(T t);
+}

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

@@ -119,6 +119,9 @@ public class InheritanceToDelegationTest extends MultiFileTestCase {
         new String[]{"getDate"}, ArrayUtil.EMPTY_STRING_ARRAY, false, false));
   }
 
+  public void testTypeParametersSubstitution() throws Exception {
+     doTest(createPerformAction("A", "myDelegate", "MyIntf", "Intf", new int[]{}, ArrayUtil.EMPTY_STRING_ARRAY, true, false));
+  }
 
   private PerformAction createPerformAction(
     final String className, final String fieldName, final String innerClassName,