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Java > Open Source Codes > org > objectweb > medor > optim > api > LeafRewriter


1 /**
2  * MEDOR: Middleware Enabling Distributed Object Requests
3  *
4  * Copyright (C) 2001-2004 France Telecom R&D
5  * Contact: alexandre.lefebvre@rd.francetelecom.com
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  * Initial developers: M. Alia, S. Chassande-Barrioz, A. Lefebvre
22  */
23 package org.objectweb.medor.optim.api;
24
25 import org.objectweb.medor.query.api.QueryLeaf;
26 import org.objectweb.medor.query.api.QueryTree;
27 import org.objectweb.medor.api.MedorException;
28
29 /**
30  * A LeafRewriter is able to rewrite some types of QueryLeaf implementation.
31  *
32  * @author S. Chassande-Barrioz
33  */
34 public interface LeafRewriter {
35
36     /**
37      * It returns true is the QueryLeaf can be rewrite by this LeafRewriter.
38      */
39     boolean canRewrite(QueryLeaf ql);
40
41     /**
42      * It rewrites the QueryLeaf into a QueryTree.
43      */
44     QueryTree rewrite(QueryLeaf ql) throws MedorException;
45
46 }
47
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