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 }