001    /**
002     * Copyright (c) 2000-2013 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.util;
016    
017    /**
018     * @author Shuyang Zhou
019     */
020    public class HashUtil {
021    
022            public static int hash(int seed, boolean value) {
023                    return seed * 11 + (value ? 1 : 0);
024            }
025    
026            public static int hash(int seed, int value) {
027                    return seed * 11 + value;
028            }
029    
030            public static int hash(int seed, long value) {
031                    return (int)(seed * 11 + value);
032            }
033    
034            public static int hash(int seed, Object value) {
035                    return seed * 11 + (value == null ? 0 : value.hashCode());
036            }
037    
038    }