001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.memory;
016    
017    import java.lang.ref.PhantomReference;
018    import java.lang.ref.ReferenceQueue;
019    
020    /**
021     * @author Shuyang Zhou
022     */
023    public class EqualityPhantomReference<T> extends PhantomReference<T> {
024    
025            public EqualityPhantomReference(
026                    T referent, ReferenceQueue<? super T> referenceQueue) {
027    
028                    super(referent, referenceQueue);
029    
030                    _hashCode = referent.hashCode();
031            }
032    
033            @Override
034            public boolean equals(Object obj) {
035                    if (this == obj) {
036                            return true;
037                    }
038    
039                    return false;
040            }
041    
042            @Override
043            public int hashCode() {
044                    return _hashCode;
045            }
046    
047            private final int _hashCode;
048    
049    }