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

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.refactoring.inheritanceToDelegation;
  17
  18 import com.intellij.psi.*;
  19
  20 /**
  21  * @author dsl
  22  */
  23 public class InheritanceToDelegationUtil {
  24   private InheritanceToDelegationUtil() {
  25   }
  26
  27   public static boolean isInnerClassNeeded(PsiClass aClass, PsiClass baseClass) {
  28     if(baseClass.isInterface()) return true;
  29     if(baseClass.hasModifierProperty(PsiModifier.ABSTRACT)) return true;
  30     PsiMethod[] methods = aClass.getMethods();
  31
  32     for (PsiMethod method : methods) {
  33       if (method.isConstructor() || method.hasModifierProperty(PsiModifier.PRIVATE)) continue;
  34       PsiMethod baseMethod = baseClass.findMethodBySignature(method, true);
  35       if (baseMethod != null) {
  36         PsiClass containingClass = baseMethod.getContainingClass();
  37         String qName = containingClass.getQualifiedName();
  38         if (qName == null || !"java.lang.Object".equals(qName)) return true;
  39       }
  40     }
  41     return false;
  42   }
  43 }