001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 **/
018
019 package org.activemq.filter;
020
021 import javax.jms.JMSException;
022 import javax.jms.Message;
023
024
025 /**
026 * Represents a filter using an expression
027 *
028 * @version $Revision: 1.1.1.1 $
029 */
030 public class ExpressionFilter implements Filter {
031
032 private Expression expression;
033
034 public ExpressionFilter(Expression expression) {
035 this.expression = expression;
036 }
037
038 public boolean matches(Message message) throws JMSException {
039 Object value = expression.evaluate(message);
040 if (value != null && value instanceof Boolean) {
041 return ((Boolean) value).booleanValue();
042 }
043 return false;
044 }
045
046 public boolean isWildcard() {
047 return false;
048 }
049
050 /**
051 * @return Returns the expression.
052 */
053 public Expression getExpression() {
054 return expression;
055 }
056
057 /* (non-Javadoc)
058 * @see java.lang.Object#toString()
059 */
060 public String toString() {
061 return "Filter: "+expression;
062 }
063 }