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Java > Open Source Codes > com > db4o > P2Collections


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;
22
23 import com.db4o.types.*;
24
25 /**
26  * @persistent
27  */
28 class P2Collections implements Db4oCollections{
29     
30     final YapStream i_stream;
31     
32     P2Collections(YapStream a_stream){
33         i_stream = a_stream;
34     }
35
36     public Db4oList newLinkedList() {
37         synchronized(i_stream.i_lock) {
38             if(Unobfuscated.createDb4oList(i_stream)){
39                 Db4oList l = new P2LinkedList();
40                 i_stream.set(l);
41                 return l;
42             }
43             return null;
44         }
45     }
46
47     public Db4oMap newHashMap(int a_size) {
48         synchronized(i_stream.i_lock) {
49             if(Unobfuscated.createDb4oList(i_stream)){
50                 return new P2HashMap(a_size);
51             }
52             return null;
53         }
54     }
55     
56     public Db4oMap newIdentityHashMap(int a_size) {
57         synchronized(i_stream.i_lock) {
58             if(Unobfuscated.createDb4oList(i_stream)){
59                 P2HashMap m = new P2HashMap(a_size);
60                 m.i_type = 1;
61                 i_stream.set(m);
62                 return m;
63             }
64             return null;
65         }
66     }
67
68 }
69
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