/*  PAT: Persistent Applications Toolkit (patsystem.sf.net)
 *  Copyright (C) 2004, 2005  Tomasz Nazar, nthx at irc dot pl
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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 library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Full version of the license is /docs/LICENSE.txt
 */
package org.nthx.pat;

import org.apache.log4j.Logger;


/** Mixin for {@link Identifiable} interface - actual implementation introduced
 *  to all BOs.
 *
 *  @version $Id: IdentifiableMixin.java 3725 2005-06-09 23:57:03Z nthx $
 *  @author nthx@users.sourceforge.net
 */
public class IdentifiableMixin
       implements Identifiable
{
    //--- Fields ----------------
    protected Long oid;


    public IdentifiableMixin()
    {
    }

    public Long getOID() { return oid; } 
    
    public void setOID(Long oid) 
    {
        if (null != getOID())
            throw new IllegalStateException("OID is already set: " + oid);
        this.oid = oid; 
    }


    final static long serialVersionUID = 1L;
    protected final static Logger logMain = Logger.getLogger("pat");
}