001 /** 002 * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved. 003 * 004 * The contents of this file are subject to the terms of the Liferay Enterprise 005 * Subscription License ("License"). You may not use this file except in 006 * compliance with the License. You can obtain a copy of the License by 007 * contacting Liferay, Inc. See the License for the specific language governing 008 * permissions and limitations under the License, including but not limited to 009 * distribution rights of the Software. 010 * 011 * 012 * 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 }