01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.defragment;
22:
23: import com.db4o.foundation.*;
24:
25: /**
26: * Base class for defragment ID mappings.
27: *
28: * @see Defragment
29: */
30: public abstract class AbstractContextIDMapping implements
31: ContextIDMapping {
32:
33: private Hashtable4 _classIDs = new Hashtable4();
34:
35: public final void mapIDs(int origID, int mappedID, boolean isClassID) {
36: if (isClassID) {
37: mapClassIDs(origID, mappedID);
38: return;
39: }
40: mapNonClassIDs(origID, mappedID);
41: }
42:
43: protected int mappedClassID(int origID) {
44: Object obj = _classIDs.get(origID);
45: if (obj == null) {
46: return 0;
47: }
48: return ((Integer) obj).intValue();
49: }
50:
51: private void mapClassIDs(int oldID, int newID) {
52: _classIDs.put(oldID, new Integer(newID));
53: }
54:
55: protected abstract void mapNonClassIDs(int origID, int mappedID);
56: }
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