01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.jms.selector;
30:
31: import javax.jms.JMSException;
32: import javax.jms.Message;
33:
34: /**
35: * The base selector.
36: */
37: public class LiteralSelector extends Selector {
38: private Object _value;
39:
40: LiteralSelector(Object value) {
41: _value = value;
42: }
43:
44: /**
45: * Evaluate the message. The boolean literal selector returns
46: * the value of the boolean.
47: */
48: Object evaluate(Message message) throws JMSException {
49: return _value;
50: }
51:
52: boolean isUnknown() {
53: return false;
54: }
55:
56: boolean isNumber() {
57: return isNumber(_value);
58: }
59:
60: public String toString() {
61: if (_value instanceof String)
62: return "'" + _value + "'";
63: else
64: return String.valueOf(_value);
65: }
66: }
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