/*

  * Entagged Audio Tag library

  * Copyright (c) 2003-2005 Rapha�l Slinckx <raphael@slinckx.net>

  * 

  * 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;

 import org.jaudiotagger.audio.asf.AsfFileReader;

 import org.jaudiotagger.audio.asf.AsfFileWriter;

 import org.jaudiotagger.audio.exceptions.CannotReadException;

 import org.jaudiotagger.audio.exceptions.CannotWriteException;

 import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException;

 import org.jaudiotagger.audio.exceptions.ReadOnlyFileException;

 import org.jaudiotagger.audio.flac.FlacFileReader;

 import org.jaudiotagger.audio.flac.FlacFileWriter;

 import org.jaudiotagger.audio.generic.*;

 import org.jaudiotagger.audio.mp3.MP3FileReader;

 import org.jaudiotagger.audio.mp3.MP3FileWriter;

 import org.jaudiotagger.audio.mp4.Mp4FileReader;

 import org.jaudiotagger.audio.mp4.Mp4FileWriter;

 import org.jaudiotagger.audio.ogg.OggFileReader;

 import org.jaudiotagger.audio.ogg.OggFileWriter;

 import org.jaudiotagger.audio.real.RealFileReader;

 import org.jaudiotagger.audio.wav.WavFileReader;

 import org.jaudiotagger.audio.wav.WavFileWriter;

 import org.jaudiotagger.tag.TagException;

 import java.io.File;

 import java.io.IOException;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.Map;

 import java.util.logging.Logger;

 /**

  * <p/>

  * The main entry point for the Tag Reading/Writing operations, this class will

  * select the appropriate reader/writer for the given file.

  * </p>

  * <p/>

  * It selects the appropriate reader/writer based on the file extension (case

  * ignored).

  * </p>

  * <p/>

  * Here is an simple example of use:

  * </p>

  * <p/>

  * <code>

  * AudioFile audioFile = AudioFileIO.read(new File("audiofile.mp3")); //Reads the given file.<br/>

  * int bitrate = audioFile.getBitrate(); //Retreives the bitrate of the file.<br/>

  * String artist = audioFile.getTag().getFirstArtist(); //Retreive the artist name.<br/>

  * audioFile.getTag().setGenre("Progressive Rock"); //Sets the genre to Prog. Rock, note the file on disk is still unmodified.<br/>

  * AudioFileIO.write(audioFile); //Write the modifications in the file on disk.

  * </code>

  * </p>

  * <p/>

  * You can also use the <code>commit()</code> method defined for

  * <code>AudioFile</code>s to achieve the same goal as

  * <code>AudioFileIO.write(File)</code>, like this:

  * </p>

  * <p/>

  * <code>

  * AudioFile audioFile = AudioFileIO.read(new File("audiofile.mp3"));<br/>

  * audioFile.getTag().setGenre("Progressive Rock");<br/>

  * audioFile.commit(); //Write the modifications in the file on disk.<br/>

  * </code>

  * </p>

  *

  * @author Raphael Slinckx

  * @version $Id: AudioFileIO.java,v 1.14 2008/10/28 10:26:24 paultaylor Exp $

  * @see AudioFile

  * @see org.jaudiotagger.tag.Tag

  * @since v0.01

  */

 public class AudioFileIO

 {

     //Logger

     public static Logger logger = Logger.getLogger("org.jaudiotagger.audio");

     // !! Do not forget to also add new supported extensions to AudioFileFilter

     // !!

     /**

      * This field contains the default instance for static use.

      */

     private static AudioFileIO defaultInstance;

     /**

      * <p/>

      * Delete the tag, if any, contained in the given file.

      * </p>

      *

      * @param f The file where the tag will be deleted

      * @throws CannotWriteException If the file could not be written/accessed, the extension

      *                              wasn't recognized, or other IO error occured.

      */

     public static void delete(AudioFile f) throws CannotReadException, CannotWriteException

     {

         getDefaultAudioFileIO().deleteTag(f);

     }

     /**

      * This method returns the default isntance for static use.<br>

      *

      * @return The default instance.

      */

     public static AudioFileIO getDefaultAudioFileIO()

     {

         if (defaultInstance == null)

         {

             defaultInstance = new AudioFileIO();

         }

         return defaultInstance;

     }

     /**

      * <p/>

      * Read the tag contained in the given file.

      * </p>

      *

      * @param f The file to read.

      * @return The AudioFile with the file tag and the file encoding infos.

      * @throws CannotReadException If the file could not be read, the extension wasn't

      *                             recognized, or an IO error occured during the read.

      */

     public static AudioFile read(File f)

             throws CannotReadException, IOException, TagException, ReadOnlyFileException, InvalidAudioFrameException

     {

         return getDefaultAudioFileIO().readFile(f);

     }

     /**

      * <p/>

      * Write the tag contained in the audiofile in the actual file on the disk.

      * </p>

      *

      * @param f The AudioFile to be written

      * @throws CannotWriteException If the file could not be written/accessed, the extension

      *                              wasn't recognized, or other IO error occured.

      */

     public static void write(AudioFile f) throws CannotWriteException

     {

         getDefaultAudioFileIO().writeFile(f);

     }

     /**

      * This member is used to broadcast modification events to registered

      */

     private final ModificationHandler modificationHandler;

     // These tables contains all the readers/writers associated with extension

     // as a key

     private Map<String, AudioFileReader> readers = new HashMap<String, AudioFileReader>();

     private Map<String, AudioFileWriter> writers = new HashMap<String, AudioFileWriter>();

     /**

      * Creates an instance.

      */

     public AudioFileIO()

     {

         this.modificationHandler = new ModificationHandler();

         prepareReadersAndWriters();

     }

     /**

      * Adds an listener for all file formats.

      *

      * @param listener listener

      */

     public void addAudioFileModificationListener(

             AudioFileModificationListener listener)

     {

         this.modificationHandler.addAudioFileModificationListener(listener);

     }

     /**

      * <p/>

      * Delete the tag, if any, contained in the given file.

      * </p>

      *

      * @param f The file where the tag will be deleted

      * @throws CannotWriteException If the file could not be written/accessed, the extension

      *                              wasn't recognized, or other IO error occured.

      */

     public void deleteTag(AudioFile f) throws CannotReadException, CannotWriteException

     {

         String ext = Utils.getExtension(f.getFile());

         Object afw = writers.get(ext);

         if (afw == null)

         {

             throw new CannotWriteException(

                     "No Deleter associated to this extension: " + ext);

         }

         ((AudioFileWriter) afw).delete(f);

     }

     /**

      * Creates the readers and writers.

      */

     private void prepareReadersAndWriters()

     {

         // Tag Readers

         readers.put(SupportedFileFormat.OGG.getFilesuffix(), new OggFileReader());

         readers.put(SupportedFileFormat.FLAC.getFilesuffix(), new FlacFileReader());

         readers.put(SupportedFileFormat.MP3.getFilesuffix(), new MP3FileReader());

         readers.put(SupportedFileFormat.MP4.getFilesuffix(), new Mp4FileReader());

         readers.put(SupportedFileFormat.M4A.getFilesuffix(), new Mp4FileReader());

         readers.put(SupportedFileFormat.M4P.getFilesuffix(), new Mp4FileReader());

         readers.put(SupportedFileFormat.WAV.getFilesuffix(), new WavFileReader());

         readers.put(SupportedFileFormat.WMA.getFilesuffix(), new AsfFileReader());

         final RealFileReader realReader = new RealFileReader();

         readers.put(SupportedFileFormat.RA.getFilesuffix(), realReader);

         readers.put(SupportedFileFormat.RM.getFilesuffix(), realReader);

         // Tag Writers

         writers.put(SupportedFileFormat.OGG.getFilesuffix(), new OggFileWriter());

         writers.put(SupportedFileFormat.FLAC.getFilesuffix(), new FlacFileWriter());

         writers.put(SupportedFileFormat.MP3.getFilesuffix(), new MP3FileWriter());

         writers.put(SupportedFileFormat.MP4.getFilesuffix(), new Mp4FileWriter());

         writers.put(SupportedFileFormat.M4A.getFilesuffix(), new Mp4FileWriter());

         writers.put(SupportedFileFormat.M4P.getFilesuffix(), new Mp4FileWriter());

         writers.put(SupportedFileFormat.WAV.getFilesuffix(), new WavFileWriter());

         writers.put(SupportedFileFormat.WMA.getFilesuffix(), new AsfFileWriter());

         // Register modificationHandler

         Iterator<AudioFileWriter> it = writers.values().iterator();

         while (it.hasNext())

         {

             AudioFileWriter curr = it.next();

             curr.setAudioFileModificationListener(this.modificationHandler);

         }

     }

     /**

      * <p/>

      * Read the tag contained in the given file.

      * </p>

      *

      * @param f The file to read.

      * @return The AudioFile with the file tag and the file encoding infos.

      * @throws CannotReadException If the file could not be read, the extension wasn't

      *                             recognized, or an IO error occured during the read.

      */

     public AudioFile readFile(File f)

             throws CannotReadException, IOException, TagException, ReadOnlyFileException, InvalidAudioFrameException

     {

         String ext = Utils.getExtension(f);

         AudioFileReader afr = readers.get(ext);

         if (afr == null)

         {

             throw new CannotReadException(

                     "No Reader associated to this extension: " + ext);

         }

         return afr.read(f);

     }

     /**

      * Removes an listener for all file formats.

      *

      * @param listener listener

      */

     public void removeAudioFileModificationListener(

             AudioFileModificationListener listener)

     {

         this.modificationHandler.removeAudioFileModificationListener(listener);

     }

     /**

      * <p/>

      * Write the tag contained in the audiofile in the actual file on the disk.

      * </p>

      *

      * @param f The AudioFile to be written

      * @throws CannotWriteException If the file could not be written/accessed, the extension

      *                              wasn't recognized, or other IO error occured.

      */

     public void writeFile(AudioFile f) throws CannotWriteException

     {

         String ext = Utils.getExtension(f.getFile());

         AudioFileWriter afw = writers.get(ext);

         if (afw == null)

         {

             throw new CannotWriteException("No Writer associated to this extension: " + ext);

         }

         afw.write(f);

     }

 }