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.InvalidSelectorException;
32: import javax.jms.JMSException;
33: import javax.jms.Message;
34:
35: /**
36: * The base selector.
37: */
38: public class BetweenSelector extends Selector {
39: private Selector _left;
40: private Selector _low;
41: private Selector _high;
42:
43: BetweenSelector(Selector left, Selector low, Selector high)
44: throws JMSException {
45: _left = left;
46: _low = low;
47: _high = high;
48:
49: if (!_left.isUnknown() && !_left.isNumber())
50: throw new InvalidSelectorException(L.l(
51: "'{0}' must have a numeric value for comparison.",
52: this ));
53: if (!_low.isUnknown() && !_low.isNumber())
54: throw new InvalidSelectorException(L.l(
55: "'{0}' must have a numeric value for comparison.",
56: this ));
57: if (!_high.isUnknown() && !_high.isNumber())
58: throw new InvalidSelectorException(L.l(
59: "'{0}' must have a numeric value for comparison.",
60: this ));
61: }
62:
63: /**
64: * Evaluate the message. The boolean literal selector returns
65: * the value of the boolean.
66: */
67: Object evaluate(Message message) throws JMSException {
68: Object lobj = _left.evaluate(message);
69:
70: if (!(lobj instanceof Number))
71: return NULL;
72:
73: Object lowObj = _low.evaluate(message);
74: Object highObj = _high.evaluate(message);
75:
76: if (!(lowObj instanceof Number) || !(highObj instanceof Number))
77: return NULL;
78:
79: if (isInteger(lobj) && isInteger(lowObj) && isInteger(highObj)) {
80: long lvalue = toLong(lobj);
81: long low = toLong(lowObj);
82: long high = toLong(highObj);
83:
84: return toBoolean(low <= lvalue && lvalue <= high);
85: } else {
86: double lvalue = toDouble(lobj);
87: double low = toDouble(lowObj);
88: double high = toDouble(highObj);
89:
90: return toBoolean(low <= lvalue && lvalue <= high);
91: }
92: }
93: }
|