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.marshall;
22:
23: import com.db4o.*;
24: import com.db4o.internal.*;
25: import com.db4o.internal.handlers.*;
26:
27: class ArrayMarshaller1 extends ArrayMarshaller {
28:
29: public void deleteEmbedded(ArrayHandler arrayHandler,
30: StatefulBuffer reader) throws Db4oIOException {
31:
32: int address = reader.readInt();
33: reader.readInt(); // length
34: if (address <= 0) {
35: return;
36: }
37:
38: int linkOffSet = reader._offset;
39:
40: Transaction trans = reader.getTransaction();
41: TypeHandler4 typeHandler = arrayHandler._handler;
42:
43: if (reader.cascadeDeletes() > 0
44: && typeHandler instanceof ClassMetadata) {
45: reader._offset = address;
46: if (Deploy.debug) {
47: reader.readBegin(arrayHandler.identifier());
48: }
49: reader.setCascadeDeletes(reader.cascadeDeletes());
50: for (int i = arrayHandler.elementCount(trans, reader); i > 0; i--) {
51: arrayHandler._handler.deleteEmbedded(_family, reader);
52: }
53: }
54:
55: if (linkOffSet > 0) {
56: reader._offset = linkOffSet;
57: }
58: }
59:
60: protected Buffer prepareIDReader(Transaction trans, Buffer reader) {
61: reader._offset = reader.readInt();
62: return reader;
63: }
64:
65: public void defragIDs(ArrayHandler arrayHandler, BufferPair readers) {
66: int offset = readers.preparePayloadRead();
67: arrayHandler.defrag1(_family, readers);
68: readers.offset(offset);
69: }
70: }
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