java/java-impl/src/com/intellij/refactoring/inline/ReferencedElementsCollector.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.inline;
  17
  18 import com.intellij.psi.*;
  19 import org.jetbrains.annotations.NotNull;
  20
  21 import java.util.HashSet;
  22
  23 /**
  24  * @author ven
  25  */
  26 class ReferencedElementsCollector extends JavaRecursiveElementWalkingVisitor {
  27   final HashSet<PsiMember> myReferencedMembers = new HashSet<PsiMember>();
  28
  29   @Override public void visitReferenceExpression(PsiReferenceExpression expression) {
  30     visitReferenceElement(expression);
  31   }
  32
  33   @Override public void visitReferenceElement(PsiJavaCodeReferenceElement reference) {
  34     final PsiElement psiElement = reference.resolve();
  35     if (psiElement instanceof PsiMember) {
  36       checkAddMember((PsiMember)psiElement);
  37     }
  38   }
  39
  40   protected void checkAddMember(@NotNull final PsiMember member) {
  41     myReferencedMembers.add(member);
  42   }
  43 }