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Java > Open Source Codes > com > db4o > db4ounit > common > fieldindex > DoubleFieldIndexTestCase


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.fieldindex;
22
23 import com.db4o.ObjectSet;
24 import com.db4o.config.*;
25 import com.db4o.query.*;
26
27 import db4ounit.ArrayAssert;
28 import db4ounit.extensions.AbstractDb4oTestCase;
29
30 /**
31  * @exclude
32  */

33 public class DoubleFieldIndexTestCase extends AbstractDb4oTestCase {
34     
35     public static void main(String JavaDoc[] args) {
36         new DoubleFieldIndexTestCase().runSolo();
37     }
38     
39     public static class Item {
40         public double value;
41         
42         public Item() {
43         }
44
45         public Item(double value_) {
46             value = value_;
47         }
48     }
49     
50     protected void configure(Configuration config){
51         indexField(config,Item.class, "value");
52     }
53     
54     protected void store() throws Exception JavaDoc {
55         db().set(new Item(0.5));
56         db().set(new Item(1.1));
57         db().set(new Item(2));
58     }
59     
60     public void testEqual() {
61         final Query query = newQuery(Item.class);
62         query.descend("value").constrain(new Double JavaDoc(1.1));
63         
64         assertItems(new double[] { 1.1 }, query.execute());
65     }
66     
67     public void testGreater() {
68         final Query query = newQuery(Item.class);
69         final Query descend = query.descend("value");
70         descend.constrain(new Double JavaDoc(1)).greater();
71         descend.orderAscending();
72         
73         assertItems(new double[] { 1.1, 2 }, query.execute());
74     }
75
76     private void assertItems(double[] expected, ObjectSet set) {
77         ArrayAssert.areEqual(expected, toDoubleArray(set));
78     }
79
80     private double[] toDoubleArray(ObjectSet set) {
81         double[] array = new double[set.size()];
82         for (int i = 0; i < array.length; i++) {
83             array[i] = ((Item)set.next()).value;
84         }
85         return array;
86     }
87
88 }
89
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