/* * Copyright 2011 the original author or authors. * * 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 org.powermock.core; import java.util.AbstractSet; import java.util.Iterator; import java.util.Map; public class IdentityHashSet<E> extends AbstractSet<E> { protected final Map<E, Boolean> backedMap; public IdentityHashSet() { this.backedMap = new ListMap<E, Boolean>(); } @Override public int size() { return backedMap.size(); } @Override public boolean contains(Object o) { return backedMap.containsKey(o); } @Override public boolean add(E o) { return backedMap.put(o, Boolean.TRUE) == null; } @Override public Iterator<E> iterator() { return backedMap.keySet().iterator(); } @Override public boolean remove(Object o) { return backedMap.remove(o) != null; } @Override public void clear() { backedMap.clear(); } }