package org.webslinger.commons.vfs;

 import java.io.IOException;

 import java.util.HashMap;

 import java.util.Iterator;

 import javax.imageio.spi.ServiceRegistry;

 public abstract class FileConvertor {

     private static final HashMap<String, FileConvertor> convertors = new HashMap<String, FileConvertor>();

     static {

         ClassLoader loader = FileConvertor.class.getClassLoader();

         Iterator<FileConvertor> it = ServiceRegistry.lookupProviders(FileConvertor.class, loader);

         while (it.hasNext()) {

             try {

                 FileConvertor convertor = it.next();

                 convertors.put(convertor.getName(), convertor);

             } catch (RuntimeException e) {

             } catch (UnsupportedClassVersionError e) {

             }

         }

     }

     public static FileConvertor getConvertor(String name) {

         return convertors.get(name);

     }

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

         return convert(fileName, data, resolver);

     }

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

     public abstract String getName();

 }