01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.internal.query.processor;
22:
23: import com.db4o.internal.*;
24:
25: /**
26: * @exclude
27: */
28: public abstract class QEStringCmp extends QEAbstract {
29:
30: public boolean caseSensitive;
31:
32: public QEStringCmp(boolean caseSensitive_) {
33: caseSensitive = caseSensitive_;
34: }
35:
36: boolean evaluate(QConObject constraint, QCandidate candidate,
37: Object obj) {
38: if (obj != null) {
39: if (obj instanceof Buffer) {
40: obj = candidate.readString((Buffer) obj);
41: }
42: String candidateStringValue = obj.toString();
43: String stringConstraint = constraint.i_object.toString();
44: if (!caseSensitive) {
45: candidateStringValue = candidateStringValue
46: .toLowerCase();
47: stringConstraint = stringConstraint.toLowerCase();
48: }
49: return compareStrings(candidateStringValue,
50: stringConstraint);
51: }
52: return constraint.i_object == null;
53: }
54:
55: public boolean supportsIndex() {
56: return false;
57: }
58:
59: protected abstract boolean compareStrings(String candidate,
60: String constraint);
61: }
|