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;
22:
23: import com.db4o.internal.*;
24: import com.db4o.types.*;
25:
26: /**
27: * @persistent
28: * @exclude
29: */
30: public class P2Collections implements Db4oCollections {
31:
32: private final Transaction _transaction;
33:
34: public P2Collections(Transaction transaction) {
35: _transaction = transaction;
36: }
37:
38: public Db4oList newLinkedList() {
39: synchronized (lock()) {
40: if (Unobfuscated.createDb4oList(container())) {
41: Db4oList l = new P2LinkedList();
42: container().set(_transaction, l);
43: return l;
44: }
45: return null;
46: }
47: }
48:
49: public Db4oMap newHashMap(int a_size) {
50: synchronized (lock()) {
51: if (Unobfuscated.createDb4oList(container())) {
52: return new P2HashMap(a_size);
53: }
54: return null;
55: }
56: }
57:
58: public Db4oMap newIdentityHashMap(int a_size) {
59: synchronized (lock()) {
60: if (Unobfuscated.createDb4oList(container())) {
61: P2HashMap m = new P2HashMap(a_size);
62: m.i_type = 1;
63: container().set(_transaction, m);
64: return m;
65: }
66: return null;
67: }
68: }
69:
70: private Object lock() {
71: return container().lock();
72: }
73:
74: private ObjectContainerBase container() {
75: return _transaction.container();
76: }
77:
78: }
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