platform/core-impl/src/com/intellij/psi/filters/OrFilter.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.psi.filters;

import com.intellij.psi.PsiElement;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Created by IntelliJ IDEA.
 * User: ik
 * Date: 28.01.2003
 * Time: 19:23:44
 * To change this template use Options | File Templates.
 */

public class OrFilter implements ElementFilter{
  private final List<ElementFilter> myFilters = new ArrayList<ElementFilter>();

  public OrFilter(){}

  public OrFilter(ElementFilter... filters){
    for (ElementFilter filter : filters) {
      addFilter(filter);
    }
  }

  public void addFilter(ElementFilter filter){
    myFilters.add(filter);
  }

  protected List getFilters(){
    return myFilters;
  }

  @Override
  public boolean isAcceptable(Object element, PsiElement context){
    if (myFilters.isEmpty()) return true;
    for (ElementFilter elementFilter : myFilters) {
      if (elementFilter.isAcceptable(element, context)) {
        return true;
      }
    }
    return false;
  }

  @Override
  public boolean isClassAcceptable(Class elementClass){
    if (myFilters.isEmpty()) return true;
    for (ElementFilter elementFilter : myFilters) {
      if (elementFilter.isClassAcceptable(elementClass)) {
        return true;
      }
    }
    return false;
  }

  public String toString(){
    String ret = "(";
    Iterator iter = myFilters.iterator();
    while(iter.hasNext()){
      ret += iter.next();
      if(iter.hasNext()){
        ret += " | ";
      }
    }
    ret += ")";
    return ret;
  }
}