/*

  * Copyright 2007 - 2007 JEuclid, http://jeuclid.sf.net

  * 

  * 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.

  */

 /* $Id: ImageIODetector.java,v 584e9b40f728 2009/04/09 07:41:44 maxberger $ */

 package net.sourceforge.jeuclid.converter;

 import java.util.Iterator;

 import java.util.Set;

 import java.util.TreeSet;

 import javax.imageio.ImageIO;

 import javax.imageio.ImageWriter;

 /**

  * Detects and registers the Converters from ImageIO.

  * 

  * @version $Revision: 584e9b40f728 $

  */

 public final class ImageIODetector implements ConverterDetector {

     /**

      * Default constructor.

      */

     public ImageIODetector() {

         // Empty on purpose

     }

     /**

      * Detects and registers all converters available through ImageIO.

      * 

      * @param registry

      *            ConverterRegistry to use.

      */

     public void detectConversionPlugins(final ConverterRegistry registry) {

         final String[] mimeTypes = ImageIO.getWriterMIMETypes();

         final Set<String> noAlphaMimeTypes = new TreeSet<String>();

         noAlphaMimeTypes.add("image/jpeg");

         noAlphaMimeTypes.add("image/bmp");

         for (final String mimeType : mimeTypes) {

             final Iterator<ImageWriter> iwit = ImageIO

                     .getImageWritersByMIMEType(mimeType);

             if (iwit != null) {

                 while (iwit.hasNext()) {

                     final ImageWriter iw = iwit.next();

                     final String[] suffixes = iw.getOriginatingProvider()

                             .getFileSuffixes();

                     if (suffixes != null) {

                         for (final String suffix : suffixes) {

                             registry.registerMimeTypeAndSuffix(mimeType,

                                     suffix, false);

                         }

                     }

                     registry.registerConverter(mimeType,

                             new ImageIOConverter(iw, noAlphaMimeTypes

                                     .contains(mimeType)), false);

                 }

             }

         }

     }

 }