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Java > Open Source Codes > com > db4o > QEStringCmp


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;
22
23 /**
24  * @exclude
25  */
26 public abstract class QEStringCmp extends QEAbstract {
27     
28     public boolean caseSensitive;
29
30     public QEStringCmp(boolean caseSensitive_) {
31         caseSensitive = caseSensitive_;
32     }
33
34     boolean evaluate(QConObject a_constraint, QCandidate a_candidate, Object JavaDoc a_value){
35         if(a_value != null){
36             if(a_value instanceof YapReader) {
37                 a_value = a_candidate._marshallerFamily._string.readFromOwnSlot(a_constraint.i_trans.stream(), ((YapReader)a_value));
38             }
39             String JavaDoc candidate=a_value.toString();
40             String JavaDoc constraint=a_constraint.i_object.toString();
41             if(!caseSensitive) {
42                 candidate=candidate.toLowerCase();
43                 constraint=constraint.toLowerCase();
44             }
45             return compareStrings(candidate,constraint);
46         }
47         return a_constraint.i_object.equals(null);
48     }
49     
50     public boolean supportsIndex(){
51         return false;
52     }
53     
54     protected abstract boolean compareStrings(String JavaDoc candidate,String JavaDoc constraint);
55 }
56
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