/*

  * $Source$

  * $Revision$

  *

  * 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.webmacro;

 import java.io.IOException;

 import org.melati.template.Template;

 import org.melati.template.TemplateContext;

 import org.melati.template.TemplateEngineException;

 import org.melati.template.TemplateIOException;

 import org.melati.util.MelatiWriter;

 import org.webmacro.Context;

 import org.webmacro.FastWriter;

 import org.webmacro.PropertyException;

 /**

  * A Template for use with Melati.

  *

  */

 public class WebmacroTemplate implements Template {

   private org.webmacro.Template webmacroTemplate;

   /**

    * Constructor.

    * @param t webmacro template

    */

   public WebmacroTemplate(org.webmacro.Template t) {

     webmacroTemplate = t;

   }

   /**

    * Write to the given output.

    * @param out a {@link MelatiWebmacroWriter}.

    */

   public void write(MelatiWriter out, TemplateContext templateContext) {

     try {

       if (out instanceof MelatiWebmacroWriter) {

         MelatiWebmacroWriter mww = (MelatiWebmacroWriter)out;

         FastWriter fw = mww.getFastWriter();

         try {

           webmacroTemplate.write(fw, (Context)templateContext.getContext());

         } catch (IOException e) {

           throw new TemplateIOException(e);

         }

         mww.stopUsingFastWriter(fw);

       } else {

         Object o = webmacroTemplate.evaluateAsString((Context)templateContext.getContext());

         try {

           out.write(o.toString());

         } catch (IOException e) {

           throw new TemplateIOException(e);

         }

       }

     } catch (PropertyException e) {

       throw new TemplateEngineException(e);

     } 

   }

 }