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: import java.io.IOException;
24:
25: import com.db4o.foundation.*;
26: import com.db4o.internal.*;
27: import com.db4o.internal.btree.*;
28: import com.db4o.internal.slots.*;
29:
30: /**
31: * Encapsulates services involving source and target database files during defragmenting.
32: *
33: * @exclude
34: */
35: public interface DefragContext extends IDMapping {
36:
37: Buffer sourceBufferByAddress(int address, int length)
38: throws IOException;
39:
40: Buffer targetBufferByAddress(int address, int length)
41: throws IOException;
42:
43: Buffer sourceBufferByID(int sourceID) throws IOException;
44:
45: Slot allocateTargetSlot(int targetLength);
46:
47: void targetWriteBytes(Buffer targetPointerReader, int targetID);
48:
49: Transaction systemTrans();
50:
51: void targetWriteBytes(BufferPair readers, int targetAddress);
52:
53: void traverseAllIndexSlots(BTree tree, Visitor4 visitor4);
54:
55: ClassMetadata yapClass(int id);
56:
57: int mappedID(int id, boolean lenient);
58:
59: void registerUnindexed(int id);
60:
61: Iterator4 unindexedIDs();
62:
63: int sourceAddressByID(int sourceID);
64: }
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