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    package org.apache.servicemix.drools.model;
018    
019    import javax.jbi.messaging.NormalizedMessage;
020    import javax.xml.namespace.NamespaceContext;
021    import javax.xml.transform.Source;
022    import javax.xml.transform.dom.DOMSource;
023    
024    import org.w3c.dom.Element;
025    
026    import org.apache.servicemix.expression.JAXPBooleanXPathExpression;
027    import org.apache.servicemix.expression.JAXPStringXPathExpression;
028    import org.apache.servicemix.jbi.jaxp.SourceTransformer;
029    
030    public class Message {
031    
032        private static final SourceTransformer TRANFORMER = new SourceTransformer();
033        
034        private final NormalizedMessage message;
035        private final NamespaceContext namespaceContext;
036        
037        public Message(NormalizedMessage message, NamespaceContext namespaceContext) {
038            this.message = message;
039            // Make sure message is re-readable
040            this.namespaceContext = namespaceContext;
041            Source content = message.getContent();
042            if (content != null) {
043                try {
044                    content = new DOMSource(TRANFORMER.toDOMElement(content));
045                    message.setContent(content);
046                } catch (Exception e) {
047                    throw new RuntimeException(e);
048                }
049            }
050            
051        }
052        
053        public NormalizedMessage getInternalMessage() {
054            return this.message;
055        }
056        
057        public boolean xpath(String xpath) throws Exception {
058            JAXPBooleanXPathExpression expression = new JAXPBooleanXPathExpression(xpath);
059            if (this.namespaceContext != null) {
060                expression.setNamespaceContext(this.namespaceContext);
061            }
062            Boolean b = (Boolean) expression.evaluate(null, message);
063            return b.booleanValue();
064        }
065        
066        public String valueOf(String xpath) throws Exception {
067            JAXPStringXPathExpression expression = new JAXPStringXPathExpression(xpath);
068            if (this.namespaceContext != null) {
069                expression.setNamespaceContext(this.namespaceContext);
070            }
071            return (String)expression.evaluate(null, message);
072        }
073        
074        
075        public Object getProperty(String name) {
076            return message.getProperty(name);
077        }
078        
079        public void setProperty(String name, Object value) {
080            message.setProperty(name, value);
081        }
082        
083        public Element getContent() {
084            return (Element) ((DOMSource) message.getContent()).getNode();
085        }
086        
087    }