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Java > Open Source Codes > com > db4o > test > QueryByInterfaceBase


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;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25
26 public abstract class QueryByInterfaceBase {
27     
28     private static class SimpleEvaluation implements Evaluation {
29         private String JavaDoc value;
30         
31         private SimpleEvaluation(String JavaDoc value) {
32             this.value = value;
33         }
34
35         public void evaluate(Candidate candidate) {
36             candidate.include(((IFoo)candidate.getObject()).s().equals(value));
37         }
38     }
39
40     public static interface IFoo {
41         String JavaDoc s();
42     }
43     
44     public static class Bar implements IFoo {
45         public int i;
46
47         public Bar(int i) {
48             this.i = i;
49         }
50
51         public String JavaDoc s() {
52             return String.valueOf((char)('A'+i));
53         }
54     }
55
56     public static class Baz implements IFoo {
57         public String JavaDoc s;
58
59         public Baz(String JavaDoc s) {
60             this.s = s;
61         }
62
63         public String JavaDoc s() {
64             return s;
65         }
66     }
67
68     protected void assertSODA(String JavaDoc value,int expCount) {
69         Query query=Test.objectContainer().query();
70         Constraint constraint=query.constrain(IFoo.class);
71         Test.ensure(constraint!=null);
72         query.descend("s").constrain(value);
73         ObjectSet result=query.execute();
74         Test.ensure(result.size()==expCount);
75     }
76
77     protected void assertEvaluation(String JavaDoc value,int expCount) {
78         Query query=Test.objectContainer().query();
79         Constraint constraint=query.constrain(IFoo.class);
80         Test.ensure(constraint!=null);
81         query.constrain(new SimpleEvaluation(value));
82         ObjectSet result=query.execute();
83         Test.ensure(result.size()==expCount);
84     }
85 }
86
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