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.internal.mapping;
22:
23: /**
24: * A mapping from yap file source IDs/addresses to target IDs/addresses, used for defragmenting.
25: *
26: * @exclude
27: */
28: public interface IDMapping {
29: /**
30: * @return a mapping for the given id. if it does refer to a system handler or the empty reference (0), returns the given id.
31: * @throws MappingNotFoundException if the given id does not refer to a system handler or the empty reference (0) and if no mapping is found
32: */
33: int mappedID(int oldID) throws MappingNotFoundException;
34:
35: void mapIDs(int oldID, int newID, boolean isClassID);
36: }
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