/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id$ */
 
package embedding;

//Hava
import java.io.File;
import java.io.IOException;

//JAXP
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.Source;
import javax.xml.transform.Result;
import javax.xml.transform.stream.StreamResult;

//Avalon
import org.apache.avalon.framework.ExceptionUtil;

import embedding.model.ProjectMember;
import embedding.model.ProjectTeam;


/**
 * This class demonstrates the conversion of an arbitrary object file to an 
 * XML file.
 */
public class ExampleObj2XML {

    /**
     * Converts a ProjectTeam object to XML.
     * @param team the ProjectTeam object
     * @param xml the target XML file
     * @throws IOException In case of an I/O problem
     * @throws TransformerException In case of a XSL transformation problem
     */
    public void convertProjectTeam2XML(ProjectTeam team, File xml) 
                throws IOException, TransformerException {
                    
        //Setup XSLT
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = factory.newTransformer();
        /* Note:
           We use the identity transformer, no XSL transformation is done.
           The transformer is basically just used to serialize the 
           generated document to XML. */
    
        //Setup input
        Source src = team.getSourceForProjectTeam();
    
        //Setup output
        Result res = new StreamResult(xml);

        //Start XSLT transformation
        transformer.transform(src, res);
    }


    /**
     * Creates a sample ProjectTeam instance for this demo.
     * @return ProjectTeam the newly created ProjectTeam instance
     */
    public static ProjectTeam createSampleProjectTeam() {
        ProjectTeam team = new ProjectTeam();
        team.setProjectName("Rule the Galaxy");
        team.addMember(new ProjectMember(
                "Emperor Palpatine", "lead", "palpatine@empire.gxy"));
        team.addMember(new ProjectMember(
                "Lord Darth Vader", "Jedi-Killer", "vader@empire.gxy"));
        team.addMember(new ProjectMember(
                "Grand Moff Tarkin", "Planet-Killer", "tarkin@empire.gxy"));
        team.addMember(new ProjectMember(
                "Admiral Motti", "Death Star operations", "motti@empire.gxy"));
        return team;
    }


    /**
     * Main method.
     * @param args command-line arguments
     */
    public static void main(String[] args) {
        try {
            System.out.println("FOP ExampleObj2XML\n");
            System.out.println("Preparing...");
            
            //Setup directories
            File baseDir = new File(".");
            File outDir = new File(baseDir, "out");
            outDir.mkdirs();

            //Setup input and output
            File xmlfile = new File(outDir, "ResultObj2XML.xml");

            System.out.println("Input: a ProjectTeam object");
            System.out.println("Output: XML (" + xmlfile + ")");
            System.out.println();
            System.out.println("Serializing...");

            ExampleObj2XML app = new ExampleObj2XML();
            app.convertProjectTeam2XML(createSampleProjectTeam(), xmlfile);
            
            System.out.println("Success!");
        } catch (Exception e) {
            System.err.println(ExceptionUtil.printStackTrace(e));
            System.exit(-1);
        }
    }
}