001    /* ImageTranscoderSpi.java -- Factory for image metadata transcoders.
002       Copyright (C) 2004, 2005  Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package javax.imageio.spi;
040    
041    import javax.imageio.ImageTranscoder;
042    
043    
044    /**
045     * An abstract superclass for service providers that create
046     * {@linkplain javax.imageio.ImageTranscoder image metadata
047     * transcoders}.
048     *
049     * @since 1.4
050     *
051     * @author Sascha Brawer (brawer@dandelis.ch)
052     */
053    public abstract class ImageTranscoderSpi
054      extends IIOServiceProvider
055    {
056      /**
057       * Constructs a service provider for image metadata transcoders,
058       * given no parameters. It is up to the sub-class to set {@link
059       * #vendorName} and {@link #version} to non-null values.
060       */
061      protected ImageTranscoderSpi()
062      {
063      }
064    
065    
066      /**
067       * Constructs a service provider for image metadata transcoders,
068       * given the vendor name and a version string.
069       *
070       * @throws IllegalArgumentException if <code>vendorName</code>
071       * or <code>version</code> is <code>null</code>.
072       */
073      public ImageTranscoderSpi(String vendorName, String version)
074      {
075        super(vendorName, version);
076      }
077    
078    
079      public abstract String getReaderServiceProviderName();
080    
081      public abstract String getWriterServiceProviderName();
082    
083      public abstract ImageTranscoder createTranscoderInstance();
084    }