objectutils.java

c3p0数据库连接池实现源码

/*
 * Distributed as part of c3p0 v.0.9.1-pre6
 *
 * Copyright (C) 2005 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <[e-mail]>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 2.1, as 
 * published by the Free Software Foundation.
 *
 * 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.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this software; see the file LICENSE.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */


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()
    {}
}