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.camel.example.gae;
018    
019    import javax.xml.xpath.XPath;
020    import javax.xml.xpath.XPathFactory;
021    
022    import org.apache.camel.Exchange;
023    import org.apache.camel.Processor;
024    
025    public class ReportGenerator implements Processor {
026    
027        public void process(Exchange exchange) throws Exception {
028            ReportData data = exchange.getIn().getBody(ReportData.class);
029            
030            XPathFactory xpfactory = XPathFactory.newInstance();
031            XPath xpath = xpfactory.newXPath();
032    
033            // Extract result values via XPath
034            String city = xpath.evaluate("//forecast_information/city/@data", data.getWeather());
035            String cond = xpath.evaluate("//current_conditions/condition/@data", data.getWeather());
036            String temp = xpath.evaluate("//current_conditions/temp_c/@data", data.getWeather());
037            
038            if (city == null || city.length() == 0) {
039                city = data.getCity();
040                cond = "<error retrieving current condition>";
041                temp = "<error retrieving current temperature>";
042            }
043            
044            exchange.getIn().setBody(new StringBuilder()
045                .append("\n").append("Weather report for:  ").append(city)
046                .append("\n").append("Current condition:   ").append(cond)
047                .append("\n").append("Current temperature: ").append(temp).append(" (Celsius)").toString());
048        }
049    
050    }