1 /***
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18
19 package org.codehaus.activemq.filter;
20
21 import javax.jms.JMSException;
22 import javax.jms.Message;
23
24
25 /***
26 * Represents a filter using an expression
27 *
28 * @version $Revision: 1.2 $
29 */
30 public class ExpressionFilter implements Filter {
31
32 private Expression expression;
33
34 public ExpressionFilter(Expression expression) {
35 this.expression = expression;
36 }
37
38 public boolean matches(Message message) throws JMSException {
39 Object value = expression.evaluate(message);
40 if (value != null && value instanceof Boolean) {
41 return ((Boolean) value).booleanValue();
42 }
43 return false;
44 }
45
46 public boolean isWildcard() {
47 return false;
48 }
49
50 /***
51 * @return Returns the expression.
52 */
53 public Expression getExpression() {
54 return expression;
55 }
56 }