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Java Source | 2000-09-28 | 4.4 KB | 122 lines | [TEXT/CWIE] |
- /*
- File: SequentialMusicDirector.java
-
- Copyright: © Copyright 1999-2000 Apple Computer, Inc. All rights reserved.
-
- Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
- ("Apple") in consideration of your agreement to the following terms, and your
- use, installation, modification or redistribution of this Apple software
- constitutes acceptance of these terms. If you do not agree with these terms,
- please do not use, install, modify or redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and subject
- to these terms, Apple grants you a personal, non-exclusive license, under Apple’s
- copyrights in this original Apple software (the "Apple Software"), to use,
- reproduce, modify and redistribute the Apple Software, with or without
- modifications, in source and/or binary forms; provided that if you redistribute
- the Apple Software in its entirety and without modifications, you must retain
- this notice and the following text and disclaimers in all such redistributions of
- the Apple Software. Neither the name, trademarks, service marks or logos of
- Apple Computer, Inc. may be used to endorse or promote products derived from the
- Apple Software without specific prior written permission from Apple. Except as
- expressly stated in this notice, no other rights or licenses, express or implied,
- are granted by Apple herein, including but not limited to any patent rights that
- may be infringed by your derivative works or by other works in which the Apple
- Software may be incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
- WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
- WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
- COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
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- (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- Change History (most recent first):
-
- */
-
-
- package com.apple.jens.radio;
-
- import com.apple.jens.mp3.MP3File;
- import java.io.*;
- import java.util.Properties;
-
-
- /** A MusicDirector that plays all MP3 files in its directory in sequence.
- It syncs with the current directory contents each time through, so it's
- safe to add/remove/rename files while it's playing.
-
- <p>ShuffleMusicDirector subclasses this and overrides the <code>reset</code>
- method to shuffle the track list each time the sequence starts.
- */
-
- public class SequentialMusicDirector implements MusicDirector {
-
- /** Initializes the SequentialMusicDirector. */
- public void initialize( MusicLibrary lib, Station station ) {
- fLibrary = lib;
- Radio.LOG(1,this,"initialized on "+lib);
- fFiles = fLibrary.getTrackList();
- reset();
- }
-
-
- /** Returns the next track to play. */
- public synchronized MP3File getNextTrack( ) {
- boolean alreadyReset = false;
- MP3File track;
- do{
- while( ++fIndex >= fFiles.length ) {
- if( alreadyReset ) {
- // We're in an infinite loop: no playable files
- Radio.WARN(1,this,"Can't find any files to play! Giving up...");
- return null;
- }
- Radio.LOG(1,this,"End of playlist; restarting");
- sync(); // Sequential play syncs with dir only at the end
- reset();
- ++fIndex;
- alreadyReset = true;
- }
- track = fFiles[fIndex];
- }while( !track.isMP3FileType() );
- Radio.LOG(2,this,"Selected track "+track.getName());
- return track;
- }
-
-
- /** Updates fFiles by calling <code>syncTrackList</code> on the MusicLibrary. */
- protected boolean sync( ) {
- if( fLibrary.syncTrackList() ) {
- fFiles = fLibrary.getTrackList();
- return true;
- } else
- return false;
- }
-
-
- /** Resets the iteration back to the beginning. */
- protected void reset( ) {
- fIndex = -1;
- }
-
-
- public String toString( ) {
- return getClass().getName()+" on "+fLibrary;
- }
-
-
- protected MusicLibrary fLibrary;
- protected MP3File[] fFiles;
- protected int fIndex;
-
- }
-