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 }