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;
22:
23: import com.db4o.ext.*;
24:
25: /**
26: * @exclude
27: */
28: public class Serializer {
29:
30: public static StatefulBuffer marshall(Transaction ta, Object obj) {
31: SerializedGraph serialized = marshall(ta.container(), obj);
32: StatefulBuffer buffer = new StatefulBuffer(ta, serialized
33: .length());
34: buffer.append(serialized._bytes);
35: buffer.useSlot(serialized._id, 0, serialized.length());
36: return buffer;
37: }
38:
39: public static SerializedGraph marshall(
40: ObjectContainerBase serviceProvider, Object obj) {
41: MemoryFile memoryFile = new MemoryFile();
42: memoryFile.setInitialSize(223);
43: memoryFile.setIncrementSizeBy(300);
44: TransportObjectContainer carrier = new TransportObjectContainer(
45: serviceProvider, memoryFile);
46: carrier
47: .produceClassMetadata(carrier.reflector()
48: .forObject(obj));
49: carrier.set(obj);
50: int id = (int) carrier.getID(obj);
51: carrier.close();
52: return new SerializedGraph(id, memoryFile.getBytes());
53: }
54:
55: public static Object unmarshall(
56: ObjectContainerBase serviceProvider, StatefulBuffer yapBytes) {
57: return unmarshall(serviceProvider, yapBytes._buffer, yapBytes
58: .getID());
59: }
60:
61: public static Object unmarshall(
62: ObjectContainerBase serviceProvider,
63: SerializedGraph serialized) {
64: return unmarshall(serviceProvider, serialized._bytes,
65: serialized._id);
66: }
67:
68: public static Object unmarshall(
69: ObjectContainerBase serviceProvider, byte[] bytes, int id) {
70: if (id <= 0) {
71: return null;
72: }
73: MemoryFile memoryFile = new MemoryFile(bytes);
74: TransportObjectContainer carrier = new TransportObjectContainer(
75: serviceProvider, memoryFile);
76: Object obj = carrier.getByID(id);
77: carrier.activate(obj, Integer.MAX_VALUE);
78: carrier.close();
79: return obj;
80: }
81:
82: }
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