KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > objectweb > medor > datasource > api > WrapperFactory


1 /**
2  * MEDOR: Middleware Enabling Distributed Object Requests
3  *
4  * Copyright (C) 2001-2003 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, A. Lefebvre
22  */
23
24 package org.objectweb.medor.datasource.api;
25
26 import org.objectweb.medor.api.DataSourceException;
27
28 /**
29  * A WrapperFactory is called at evaluation time by the QueryEvaluator when
30  * reaching a QueryLeaf. The WrapperFactory generates the appropriate
31  * Wrapper for the QueryLeaf.
32  * It maintains its pool of Wrappers.
33  *
34  * @author Sebastien Chassande-Barrioz
35  */
36 public interface WrapperFactory {
37
38     Wrapper getWrapper(DataStore dl) throws DataSourceException;
39
40     /**
41      * For a given data store type, associates a Wrapper class.
42      * This will be used by the evaluator to associate the right Wrapper to
43      * each query leaf (data store).
44      * The Wrapper class must have an empty constructor (because it is
45      * instanciated using newInstance).
46      * @param dataStoreType is the type of data store
47      * (DataStore.getDataStoreType())
48      * @param wrapperClass is the java Class for the associated Wrapper.
49      */
50     void bindDataStoreToWrapper(short dataStoreType,
51                                 java.lang.Class JavaDoc wrapperClass)
52         throws DataSourceException;
53 }
54
Popular Tags