/*

  * $Source: /usr/cvsroot/melati/melati/src/main/java/org/melati/template/velocity/VelocityTemplate.java,v $

  * $Revision: 1.8 $

  *

  * Copyright (C) 2000 Tim Joyce

  *

  * Part of Melati (http://melati.org), a framework for the rapid

  * development of clean, maintainable web applications.

  *

  * Melati is free software; Permission is granted to copy, distribute

  * and/or modify this software under the terms either:

  *

  * a) the GNU General Public License as published by the Free Software

  *    Foundation; either version 2 of the License, or (at your option)

  *    any later version,

  *

  *    or

  *

  * b) any version of the Melati Software License, as published

  *    at http://melati.org

  *

  * You should have received a copy of the GNU General Public License and

  * the Melati Software License along with this program;

  * if not, write to the Free Software Foundation, Inc.,

  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the

  * GNU General Public License and visit http://melati.org to obtain the

  * Melati Software License.

  *

  * Feel free to contact the Developers of Melati (http://melati.org),

  * if you would like to work out a different arrangement than the options

  * outlined here.  It is our intention to allow Melati to be used by as

  * wide an audience as possible.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * Contact details for copyright holder:

  *

  *     Tim Joyce <timj At paneris.org>

  *     http://paneris.org/

  *     68 Sandbanks Rd, Poole, Dorset. BH14 8BY. UK

  */

 package org.melati.template.velocity;

 import org.melati.util.MelatiBugMelatiException;

 import org.melati.util.MelatiWriter;

 import org.melati.template.TemplateEngine;

 import org.melati.template.TemplateContext;

 import org.melati.template.TemplateEngineException;

 import org.apache.velocity.VelocityContext;

 import org.apache.velocity.exception.ParseErrorException;

 import org.apache.velocity.exception.ResourceNotFoundException;

 import org.apache.velocity.runtime.RuntimeSingleton;

 /**

  * A Velocity Template for use with Melati.

  */

 public class VelocityTemplate implements org.melati.template.Template {

   private org.apache.velocity.Template template;

   /**

    * Constructor.

    * @param templateName name or Template

    * @throws ParseErrorException if there is a problem paring the template

    * @throws ResourceNotFoundException if the template is not found

    */

   public VelocityTemplate(String templateName) 

       throws ParseErrorException, ResourceNotFoundException {

     try {

       template = RuntimeSingleton.getTemplate(templateName);

     } catch (ResourceNotFoundException e) {

       throw e;

     } catch (ParseErrorException e) {

       throw e;

     } catch (Exception e) {

       throw new MelatiBugMelatiException("Problem getting Velocity template", e);

     }

   }

   /**

    * {@inheritDoc}

    * @see org.melati.template.Template#write

    * (org.melati.util.MelatiWriter, org.melati.template.TemplateContext, 

    * org.melati.template.TemplateEngine)

    */

   public void write(MelatiWriter out, TemplateContext templateContext, 

                     TemplateEngine engine) throws TemplateEngineException {

     try {

       template.merge((VelocityContext)templateContext.getContext(),out);

     } catch (Exception e) {

       throw new TemplateEngineException(e);

     }

   }

 }