/* * 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.c3p0.impl;import com.mchange.v2.c3p0.*;import java.io.ObjectStreamException;/** * This is a convenient base class for all classes * that wish to establish an initial identity which * will be the basis of a one-per vm identity: i.e. * in any vm there should only ever be a single object * with a given identity token (except transiently during * canonicalization) * * It would be convenient to put the getter/setter methods * for the identity token here, but unfortunately we have no * way of setting up the for Referenceability in multiple * levels of a class hierarchy. So we leave the getters/setters, * and variable initialization to code-generators. * * Non-generated classes, that of course take care of their own * referenceability, should extend BaseIdentityTokenized to * inherit these extra conveniences. * * NOTE: since I'm not using it just now, BaseIdentityTokenized *       is removed to the old/ directory... recover if necessary */public abstract class IdentityTokenResolvable implements IdentityTokenized{    public static Object doResolve(IdentityTokenized itd)    { return C3P0Registry.coalesce( itd ); }    protected Object readResolve() throws ObjectStreamException    { 	//System.err.println("READ RESOLVE!!!!");	Object out = doResolve( this ); 	verifyResolve( out );	//System.err.println("ORIG: " + this);	//System.err.println("RSLV: " + out);	return out;    }    protected void verifyResolve( Object o ) throws ObjectStreamException    {}}