/*
* $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/oac.hc3x/tags/HTTPCLIENT_3_1/src/java/org/apache/commons/httpclient/util/LangUtils.java $
* $Revision: 480424 $
* $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
*
* ====================================================================
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.commons.httpclient.util;
/**
* A set of utility methods to help produce consistent Object#equals(Object) and
* Object#hashCode methods.
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @since 3.0
*/
public class LangUtils {
public static final int HASH_SEED = 17;
public static final int HASH_OFFSET = 37;
private LangUtils() {
super();
}
public static int hashCode(final int seed, final int hashcode) {
return seed * HASH_OFFSET + hashcode;
}
public static int hashCode(final int seed, final Object obj) {
return hashCode(seed, obj != null ? obj.hashCode() : 0);
}
public static int hashCode(final int seed, final boolean b) {
return hashCode(seed, b ? 1 : 0);
}
public static boolean equals(final Object obj1, final Object obj2) {
return obj1 == null ? obj2 == null : obj1.equals(obj2);
}
}