1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.mina.util; 21 22 import java.util.Collection; 23 import java.util.IdentityHashMap; 24 import java.util.Set; 25 26 /** 27 * An {@link IdentityHashMap}-backed {@link Set}. 28 * 29 * @author The Apache MINA Project (dev@mina.apache.org) 30 * @version $Rev: 597692 $, $Date: 2007-11-23 16:56:32 +0100 (ven, 23 nov 2007) $ 31 */ 32 public class IdentityHashSet<E> extends MapBackedSet<E> { 33 34 private static final long serialVersionUID = 6948202189467167147L; 35 36 public IdentityHashSet() { 37 super(new IdentityHashMap<E, Boolean>()); 38 } 39 40 public IdentityHashSet(int expectedMaxSize) { 41 super(new IdentityHashMap<E, Boolean>(expectedMaxSize)); 42 } 43 44 public IdentityHashSet(Collection<E> c) { 45 super(new IdentityHashMap<E, Boolean>(), c); 46 } 47 }