001    /** 
002     * Copyright 2005 Hiram Chirino
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License"); 
005     * you may not use this file except in compliance with the License. 
006     * You may obtain a copy of the License at 
007     * 
008     * http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS, 
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
013     * See the License for the specific language governing permissions and 
014     * limitations under the License. 
015     * 
016     **/
017    package org.activemq.filter;
018    
019    import javax.jms.JMSException;
020    import javax.jms.Message;
021    
022    /**
023     * Used to evaluate an XQuery Expression in a JMS selector.
024     */
025    public final class XQueryExpression implements BooleanExpression {
026        private final String xpath;
027    
028        XQueryExpression(String xpath) {
029            super();
030            this.xpath = xpath;
031        }
032    
033        public Object evaluate(Message message) throws JMSException {
034            return Boolean.FALSE;
035        }
036    
037        public String toString() {
038            return "XQUERY "+ConstantExpression.encodeString(xpath);
039        }
040    }