java/java-impl/src/com/intellij/usages/impl/rules/ImportFilteringRule.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.usages.impl.rules;
  17
  18 import com.intellij.psi.PsiElement;
  19 import com.intellij.psi.PsiFile;
  20 import com.intellij.psi.PsiImportList;
  21 import com.intellij.psi.PsiJavaFile;
  22 import com.intellij.psi.util.PsiTreeUtil;
  23 import com.intellij.usages.Usage;
  24 import com.intellij.usages.rules.PsiElementUsage;
  25 import com.intellij.usages.rules.UsageFilteringRule;
  26
  27 /**
  28  * @author Eugene Zhuravlev
  29  *         Date: Jan 17, 2005
  30  */
  31 public class ImportFilteringRule implements UsageFilteringRule{
  32   public boolean isVisible(Usage usage) {
  33     if (usage instanceof PsiElementUsage) {
  34       final PsiElement psiElement = ((PsiElementUsage)usage).getElement();
  35       final PsiFile containingFile = psiElement.getContainingFile();
  36       if (containingFile instanceof PsiJavaFile) {
  37         // check whether the element is in the import list
  38         final PsiImportList importList = PsiTreeUtil.getParentOfType(psiElement, PsiImportList.class, true);
  39         return importList == null;
  40       }
  41     }
  42     return true;
  43   }
  44 }