1/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
2 *
3 * This program and the accompanying materials are made available under
4 * the terms of the Common Public License v1.0 which accompanies this distribution,
5 * and is available at http://www.eclipse.org/legal/cpl-v10.html
6 *
7 * $Id: IMergeable.java,v 1.1.1.1 2004/05/09 16:57:31 vlad_r Exp $
8 */
9package com.vladium.emma.data;
10
11import java.io.Serializable;
12
13// ----------------------------------------------------------------------------
14/**
15 * @author Vlad Roubtsov, (C) 2003
16 */
17public
18interface IMergeable extends Serializable
19{
20    // public: ................................................................
21
22    boolean isEmpty ();
23
24    /**
25     * Caller must always switch to the returned handle.
26     */
27    IMergeable merge (IMergeable data);
28
29} // end of interface
30// ----------------------------------------------------------------------------