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: import com.db4o.internal.slots.*;
27:
28: class ArrayMarshaller0 extends ArrayMarshaller {
29:
30: public void deleteEmbedded(ArrayHandler arrayHandler,
31: StatefulBuffer reader) throws Db4oIOException {
32: Slot slot = reader.readSlot();
33: if (slot.address() <= 0) {
34: return;
35: }
36: Transaction trans = reader.getTransaction();
37: if (reader.cascadeDeletes() > 0
38: && arrayHandler._handler instanceof ClassMetadata) {
39: StatefulBuffer bytes = reader.getStream()
40: .readWriterByAddress(trans, slot.address(),
41: slot.length());
42: if (Deploy.debug) {
43: bytes.readBegin(arrayHandler.identifier());
44: }
45: bytes.setCascadeDeletes(reader.cascadeDeletes());
46: for (int i = arrayHandler.elementCount(trans, bytes); i > 0; i--) {
47: arrayHandler._handler.deleteEmbedded(_family, bytes);
48: }
49: }
50: trans.slotFreeOnCommit(slot.address(), slot);
51: }
52:
53: protected Buffer prepareIDReader(Transaction trans, Buffer reader)
54: throws Db4oIOException {
55: return reader.readEmbeddedObject(trans);
56: }
57:
58: public void defragIDs(ArrayHandler arrayHandler, BufferPair readers) {
59: }
60: }
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