java/java-impl/src/com/intellij/codeInspection/util/RefFilter.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
  17 /*
  18  * Created by IntelliJ IDEA.
  19  * User: max
  20  * Date: Dec 1, 2001
  21  * Time: 11:42:56 PM
  22  * To change template for new class use
  23  * Code Style | Class Templates options (Tools | IDE Options).
  24  */
  25 package com.intellij.codeInspection.util;
  26
  27 import com.intellij.codeInspection.reference.RefEntity;
  28 import com.intellij.codeInspection.reference.RefJavaElement;
  29 import com.intellij.codeInspection.reference.RefParameter;
  30
  31 public abstract class RefFilter {
  32   // Default accepts implementation accepts element if one under unaccepted one. Thus it will accept all and only upper level classes.
  33   public int getElementProblemCount(RefJavaElement refElement) {
  34     if (refElement instanceof RefParameter) return 0;
  35     RefEntity refOwner = refElement.getOwner();
  36     if (refOwner == null || !(refOwner instanceof RefJavaElement)) return 1;
  37
  38     return 1 - getElementProblemCount((RefJavaElement)refOwner);
  39   }
  40
  41   public final boolean accepts(RefJavaElement refElement) {
  42     return getElementProblemCount(refElement) > 0;
  43   }
  44 }