001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  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    package org.apache.activemq.filter;
019    
020    import javax.jms.BytesMessage;
021    import javax.jms.JMSException;
022    import javax.jms.TextMessage;
023    
024    import org.apache.activemq.command.Message;
025    import org.apache.activemq.util.ByteArrayInputStream;
026    import org.apache.xmlbeans.XmlObject;
027    
028    public class XMLBeansXPathEvaluator implements XPathExpression.XPathEvaluator {
029    
030        private final String xpath;
031    
032        public XMLBeansXPathEvaluator(String xpath) {
033            this.xpath = xpath;
034        }
035    
036        public boolean evaluate(Message message) throws JMSException {
037            if (message instanceof TextMessage) {
038                String text = ((TextMessage)message).getText();
039                try {
040                    XmlObject object = XmlObject.Factory.parse(text);
041                    XmlObject[] objects = object.selectPath(xpath);
042                    return object != null && objects.length > 0;
043                } catch (Throwable e) {
044                    return false;
045                }
046    
047            } else if (message instanceof BytesMessage) {
048                BytesMessage bm = (BytesMessage)message;
049                byte data[] = new byte[(int)bm.getBodyLength()];
050                bm.readBytes(data);
051                try {
052                    XmlObject object = XmlObject.Factory.parse(new ByteArrayInputStream(data));
053                    XmlObject[] objects = object.selectPath(xpath);
054                    return object != null && objects.length > 0;
055                } catch (Throwable e) {
056                    return false;
057                }
058            }
059            return false;
060        }
061    }