package org.webslinger.ext.wiki;

 import java.io.IOException;

 import java.io.StringReader;

 import java.io.StringWriter;

 import org.webslinger.commons.vfs.FileConvertor;

 import org.webslinger.commons.vfs.FileResolver;

 import org.webslinger.ext.wiki.parser.AbstractWikiVisitor;

 import org.webslinger.ext.wiki.parser.ParseException;

 import org.webslinger.ext.wiki.parser.Wiki;

 import org.webslinger.ext.wiki.parser.WikiPage;

 import org.webslinger.ext.wiki.parser.WikiVisitor;

 public abstract class WikiConvertor extends FileConvertor {

     protected final AbstractWikiVisitor.Factory visitorFactory;

     public WikiConvertor(AbstractWikiVisitor.Factory visitorFactory) {

         this.visitorFactory = visitorFactory;

     }

     public String convert(Object context, String fileName, String data, FileResolver resolver) throws IOException {

         StringWriter writer = new StringWriter();

         Wiki wiki = new Wiki(new StringReader(data));

         WikiVisitor visitor = visitorFactory.newVisitor(fileName, writer, resolver);

         WikiPage page;

         try {

             page = wiki.Page();

         } catch (ParseException e) {

             throw (IOException) new IOException(e.getMessage()).initCause(e);

         }

         Optimizer optimizer = new Optimizer();

         optimizer.setConvertNewlinesToText(false);

         page.jjtAccept(optimizer, null);

         page.jjtAccept(visitor, context);

         return writer.toString();

     }

     public String convert(String fileName, String data, FileResolver resolver) throws IOException {

         throw new InternalError("This should never be called");

     }

 }