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Java > Open Source Codes > com > db4o > inside > marshall > StringMarshaller0


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 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.inside.marshall;
22
23 import com.db4o.*;
24
25
26 public class StringMarshaller0 extends StringMarshaller {
27     
28     public boolean inlinedStrings(){
29         return false;
30     }
31     
32     public void calculateLengths(Transaction trans, ObjectHeaderAttributes header, boolean topLevel, Object JavaDoc obj, boolean withIndirection) {
33         // do nothing
34 }
35     
36     public Object JavaDoc writeNew(Object JavaDoc a_object, boolean topLevel, YapWriter a_bytes, boolean redirect) {
37         if (a_object == null) {
38             a_bytes.writeEmbeddedNull();
39             return null;
40         }
41         
42         YapStream stream = a_bytes.getStream();
43         String JavaDoc str = (String JavaDoc) a_object;
44         int length = stream.stringIO().length(str);
45         
46         YapWriter bytes = new YapWriter(a_bytes.getTransaction(), length);
47         
48         writeShort(stream, str, bytes);
49         
50         bytes.setID(a_bytes._offset);
51         
52         a_bytes.getStream().writeEmbedded(a_bytes, bytes);
53         a_bytes.incrementOffset(YapConst.ID_LENGTH);
54         a_bytes.writeInt(length);
55         return bytes;
56     }
57     
58     public YapReader readIndexEntry(YapWriter parentSlot) throws CorruptionException{
59         return parentSlot.getStream().readWriterByAddress(parentSlot.getTransaction(), parentSlot.readInt(), parentSlot.readInt());
60     }
61     
62     public YapReader readSlotFromParentSlot(YapStream stream, YapReader reader) throws CorruptionException {
63         return reader.readEmbeddedObject(stream.getTransaction());
64     }
65
66     public void defrag(SlotReader reader) {
67     }
68 }
69
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