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Java > Open Source Codes > com > db4o > test > pending > UpwardCollectionQuery


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.test.pending;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25 import com.db4o.test.*;
26
27
28 public class UpwardCollectionQuery {
29     public void store(){
30         SimpleNode sub=new SimpleNode("sub",new SimpleNode[0]);
31         SimpleNode sup=new SimpleNode("sup",new SimpleNode[]{sub});
32         Test.store(sup);
33     }
34
35     public void test() {
36         Query supq=Test.query();
37         supq.constrain(SimpleNode.class);
38         Query subq=supq.descend("children");
39         subq.constrain(SimpleNode.class);
40         subq.descend("name").constrain(new Evaluation() {
41             public void evaluate(Candidate candidate) {
42                 candidate.include(true);
43             }
44         });
45         ObjectSet objectSet = subq.execute();
46         Test.ensure(objectSet.size() == 1);
47         Object JavaDoc found=objectSet.next();
48         System.err.println(found.getClass());
49         Test.ensure(found.getClass()==SimpleNode.class);
50     }
51 }
52
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