dxabstractiterator.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: DxAbstractIterator.java,v 1.5 2000/10/28 16:55:14 daniela Exp $

package org.ozoneDB.DxLib;

import java.io.*;

/**
 * 
 * 
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.5 $Date: 2000/10/28 16:55:14 $
 */
public abstract class DxAbstractIterator extends DxObject implements DxIterator {
    
    final static long serialVersionUID = 1L;
    
    boolean atFirstObject;
    boolean objectRemoved;
    
    
    /**
     * It is not a good idea to declare this abstract because some
     * sub-classes do not know how to implement this method.
     */
    public Object key() {
        throw new RuntimeException( "key(): subsclass responsibility" );
    } 
}