File: XMLTest.java

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/*
 * Copyright 2000,2004 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.
 */

import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.Writer;

import org.apache.velocity.VelocityContext;
import org.apache.velocity.Template;
import org.apache.velocity.app.Velocity;

import org.jdom.Document;
import org.jdom.input.SAXBuilder;


/**
 * Example to show basic XML handling in a template.
 *
 * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
 * @version $Id: XMLTest.java,v 1.2.12.1 2004/03/04 00:18:30 geirm Exp $
 */
public class XMLTest
{
    public XMLTest( String templateFile)
    {    
        Writer writer = null;

        try
        {
            /*
             *  and now call init
             */

            Velocity.init();

                       
            /*
             * build a Document from our xml
             */

            SAXBuilder builder;
            Document root = null;

            try 
            {
                builder = new SAXBuilder(  "org.apache.xerces.parsers.SAXParser" );
                root = builder.build("test.xml");
            }
            catch( Exception ee)
            { 
                System.out.println("Exception building Document : " + ee);
                return;
            }

            /*
             * now, make a Context object and populate it.
             */

            VelocityContext context = new VelocityContext();
            context.put("root", root);

            /*
             *  make a writer, and merge the template 'against' the context
             */
 
            Template template = Velocity.getTemplate(templateFile);

            writer = new BufferedWriter(new OutputStreamWriter(System.out));
            template.merge( context , writer);  
        }
        catch( Exception e )
        {
           System.out.println("Exception : " + e);
        }
        finally
        {
            if ( writer != null)
            {
                try
                {
                    writer.flush();
                    writer.close();
                }
                catch( Exception ee )
                {
                    System.out.println("Exception : " + ee );
                }
            }
        }
    }

    public static void main(String[] args)
    {
        XMLTest t;

        if( args.length < 1 )
        {
            System.out.println("Usage : java XMLTest <templatename>");
            return;
        }

        t = new XMLTest(args[0]);
    }
}