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/* JPEGImageReaderSpi.java --

   Copyright (C)  2006  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath 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.

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

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.javax.imageio.jpeg;

import java.io.IOException;

import java.util.Locale;

import javax.imageio.ImageReader;

import javax.imageio.spi.ImageReaderSpi;

import javax.imageio.spi.IIORegistry;

import javax.imageio.stream.ImageInputStream;

public class JPEGImageReaderSpi extends ImageReaderSpi

{

  static final String vendorName = "GNU";

  static final String version = "0.1";

  static final String readerClassName =

    "gnu.javax.imageio.jpeg.JPEGImageReader";

  static final String[] names = { "JPEG" };

  static final String[] suffixes = { ".jpeg", ".jpg", ".jpe" };

  static final String[] MIMETypes = { "image/jpeg" };

  static final String[] writerSpiNames =

    { "gnu.javax.imageio.jpeg.JPEGImageWriterSpi" };

  static final boolean supportsStandardStreamMetadataFormat = false;

  static final String nativeStreamMetadataFormatName = null;

  static final String nativeStreamMetadataFormatClassName = null;

  static final String[] extraStreamMetadataFormatNames = null;

  static final String[] extraStreamMetadataFormatClassNames = null;

  static final boolean supportsStandardImageMetadataFormat = false;

  static final String nativeImageMetadataFormatName = null;

  static final String nativeImageMetadataFormatClassName = null;

  static final String[] extraImageMetadataFormatNames = null;

  static final String[] extraImageMetadataFormatClassNames = null;

  private static JPEGImageReaderSpi readerSpi;

  public JPEGImageReaderSpi()

  {

    super(vendorName, version,

          names, suffixes, MIMETypes,

          readerClassName,

          STANDARD_INPUT_TYPE, // Accept ImageInputStreams

          writerSpiNames,

          supportsStandardStreamMetadataFormat,

          nativeStreamMetadataFormatName,

          nativeStreamMetadataFormatClassName,

          extraStreamMetadataFormatNames,

          extraStreamMetadataFormatClassNames,

          supportsStandardImageMetadataFormat,

          nativeImageMetadataFormatName,

          nativeImageMetadataFormatClassName,

          extraImageMetadataFormatNames,

          extraImageMetadataFormatClassNames);

    System.out.println ("JPEGImageReaderSPI!!!");

  }

  public String getDescription(Locale locale)

  {

    return "JPEG ISO 10918-1, JFIF V1.02";

  }

  public boolean canDecodeInput(Object input)

    throws IOException

  {

    if (!(input instanceof ImageInputStream))

      return false;

    ImageInputStream in = (ImageInputStream) input;

    boolean retval;

    in.mark();

    try

      {

        new JPEGDecoder(in);

        retval = true;

      }

    catch(JPEGException e)

      {

        retval = false;

      }

    in.reset();

    return retval;

  }

  public ImageReader createReaderInstance(Object extension)

  {

    return new JPEGImageReader(this);

  }

  public static void registerSpis(IIORegistry reg)

  {

    reg.registerServiceProvider(getReaderSpi(), ImageReaderSpi.class);

  }

  public static synchronized JPEGImageReaderSpi getReaderSpi()

  {

    if (readerSpi == null)

      readerSpi = new JPEGImageReaderSpi();

    return readerSpi;

  }

}