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Java > Open Source Codes > com > db4o > db4ounit > common > assorted > DatabaseUnicityTest


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.db4ounit.common.assorted;
22
23 import com.db4o.*;
24 import com.db4o.ext.*;
25 import com.db4o.foundation.Hashtable4;
26 import com.db4o.query.Query;
27
28 import db4ounit.Assert;
29 import db4ounit.extensions.AbstractDb4oTestCase;
30
31 public class DatabaseUnicityTest extends AbstractDb4oTestCase {
32
33     public void test() {
34         Hashtable4 ht = new Hashtable4();
35         ExtObjectContainer oc = db();
36         YapStream yapStream = ((YapStream) oc);
37         yapStream.showInternalClasses(true);
38         Query q = db().query();
39         q.constrain(Db4oDatabase.class);
40         ObjectSet objectSet = q.execute();
41         while (objectSet.hasNext()) {
42             Db4oDatabase d4b = (Db4oDatabase) objectSet.next();
43             Assert.isFalse(ht.containsKey(d4b.i_signature));
44             ht.put(d4b.i_signature, "");
45         }
46         yapStream.showInternalClasses(false);
47         
48         oc.close();
49     }
50
51 }
52
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