/* * Distributed as part of c3p0 v.0.9.1-pre6 * * Copyright (C) 2005 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 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.coalesce;public interface CoalesceChecker{    /**     *  @return true iff a and b should be considered equivalent,     *          so that a Coalescer should simply return whichever     *          Object it considers canonical.     */    public boolean checkCoalesce( Object a, Object b );    /**     *  Any two objects for which checkCoalese() would return true <b>must</b>     *  coalesce hash to the same value!!!     */    public int coalesceHash( Object a );}