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 java.util.Random;
24:
25: import com.db4o.Deploy;
26:
27: /**
28: * @exclude
29: */
30: public class Unobfuscated {
31:
32: private static final Random _random = new Random();
33:
34: public static boolean createDb4oList(Object a_stream) {
35: ((ObjectContainerBase) a_stream).checkClosed();
36: return !((ObjectContainerBase) a_stream).isInstantiating();
37: }
38:
39: public static byte[] generateSignature() {
40: // TODO: We could add part of the file name to improve
41: // signature security.
42: StatefulBuffer writer = new StatefulBuffer(null, 300);
43: if (!Deploy.csharp) {
44: try {
45: new LatinStringIO().write(writer, java.net.InetAddress
46: .getLocalHost().getHostName());
47: writer.writeByte((byte) 0);
48: writer.append(java.net.InetAddress.getLocalHost()
49: .getAddress());
50: } catch (Exception e) {
51: }
52: }
53: writer.writeLong(System.currentTimeMillis());
54: writer.writeLong(randomLong());
55: writer.writeLong(randomLong() + 1);
56: return writer.getWrittenBytes();
57: }
58:
59: public static long randomLong() {
60: return _random.nextLong();
61: }
62: }
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