ObjectUtils.java

/*
 * Distributed as part of mchange-commons-java 0.2.11
 *
 * Copyright (C) 2015 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <swaldman@mchange.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of EITHER:
 *
 *     1) The GNU Lesser General Public License (LGPL), version 2.1, as 
 *        published by the Free Software Foundation
 *
 * OR
 *
 *     2) The Eclipse Public License (EPL), version 1.0
 *
 * You may choose which license to accept if you wish to redistribute
 * or modify this work. You may offer derivatives of this work
 * under the license you have chosen, or you may provide the same
 * choice of license which you have been offered here.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received copies of both LGPL v2.1 and EPL v1.0
 * along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
 * If not, the text of these licenses are currently available at
 *
 * LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 *  EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php 
 * 
 */

package com.mchange.v2.lang;

public final class ObjectUtils
{
    public static boolean eqOrBothNull(Object a, Object b)
    {
	if (a == b)
	    return true;
	else if (a == null)
	    return false;
	else
	    return a.equals(b);
    }
	
    /**
     *  Note -- if you are using Arrays.equals( ... ) or similar
     *  and want a compatible hash method, see methods in 
     * {@link com.mchange.v1.util.ArrayUtils#hashOrZeroArray ArrayUtils}.
     */
    public static int hashOrZero(Object o)
    { return (o == null ? 0 : o.hashCode()); }

    private ObjectUtils()
    {}
}