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Java > Open Source Codes > org > objectweb > jorm > facility > naming > polymorphid > PolymorphIdMgrRegistry


1 /**
2  * JORM: an implementation of a generic mapping system for persistent Java
3  * objects. Two mapping are supported: to RDBMS and to binary files.
4  * Copyright (C) 2001-2003 France Telecom R&D - INRIA
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  * Contact: jorm-team@objectweb.org
21  *
22  */
23
24 package org.objectweb.jorm.facility.naming.polymorphid;
25
26 import org.objectweb.jorm.api.PMapper;
27 import org.objectweb.jorm.api.PException;
28
29 import java.util.HashMap JavaDoc;
30
31 /**
32  * Statically registers PolymorphIdMgr associated with mappers within a JVM
33  * context.
34  * @author P. Dechamboux
35  */
36 public class PolymorphIdMgrRegistry {
37     static HashMap JavaDoc mgrs = new HashMap JavaDoc();
38
39     /**
40      * Removes this PolymorphIdMgr from this registry.
41      */
42     public static void deregisterPolymorphIdMgr(PolymorphIdMgr pim) {
43         mgrs.remove(pim.getPMapper());
44     }
45
46     /**
47      * Looks for a PolymorphIdMgr associated with this mapper.
48      */
49     public static PolymorphIdMgr getPolymorphIdMgr(PMapper m) {
50         PolymorphIdMgr res;
51         res = (PolymorphIdMgr) mgrs.get(m);
52         return res;
53     }
54
55     /**
56      * Adds this PolymorphIdMgr from this registry.
57      */
58     public static synchronized void registerPolymorphIdMgr(PolymorphIdMgr pim)
59             throws PException {
60         if (mgrs.get(pim.getPMapper()) != null) {
61             throw new PException("PolymorphIdMgr already registered.");
62         }
63         mgrs.put(pim.getPMapper(), pim);
64     }
65 }
66
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