/*

  * Entagged Audio Tag library

  * Copyright (c) 2004-2005 Christian Laireiter <liree@web.de>

  * 

  * This library is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public

  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *  

  * This library 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

  * Lesser General Public License for more details.

  * 

  * You should have received a copy of the GNU Lesser General Public

  * License along with this library; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

  */

 package org.jaudiotagger.audio.asf.io;

 import java.io.IOException;

 import java.io.InputStream;

 import java.math.BigInteger;

 import org.jaudiotagger.audio.asf.data.Chunk;

 import org.jaudiotagger.audio.asf.data.GUID;

 import org.jaudiotagger.audio.asf.util.Utils;

 /**

  * Default reader, Reads GUID and size out of an input stream and creates a

  * {@link org.jaudiotagger.audio.asf.data.Chunk}object, finally skips the 

  * remaining chunk bytes.

  *

  * @author Christian Laireiter

  */

 class ChunkHeaderReader implements ChunkReader

 {

     /**

      * {@inheritDoc}

      */

     public boolean canFail()

     {

         return false;

     }

     /**

      * {@inheritDoc}

      */

     public GUID getApplyingId()

     {

         return GUID.GUID_UNSPECIFIED;

     }

     /**

      * {@inheritDoc}

      */

     public Chunk read(final GUID guid, final InputStream stream, final long chunkStart) throws IOException

     {

         final BigInteger chunkLen = Utils.readBig64(stream);

         stream.skip(chunkLen.longValue() - 24);

         final Chunk result = new Chunk(guid, chunkStart, chunkLen);

         return result;

     }

 }