/*

 * Copyright (C) 2010 Google Inc.

 * 

 * Licensed under the Apache License, Version 2.0 (the "License"); you may not

 * use this file except in compliance with the License. You may obtain a copy of

 * the License at

 * 

 * http://www.apache.org/licenses/LICENSE-2.0

 * 

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

 * License for the specific language governing permissions and limitations under

 * the License.

 */



package com.marvin.rocklock;



/**

 * Interface for traversing through the songs on the device. Individual

 * implementations can handle traversal differently - for example, traversal

 * through tagged content vs directory structure vs playlists.

 * 

 * @author clchen@google.com (Charles L. Chen)

 */

public interface SongPicker {



    public String peekNextArtist();



    public String peekPrevArtist();



    public String goNextArtist();



    public String goPrevArtist();



    public String peekNextAlbum();



    public String goNextAlbum();



    public String peekPrevAlbum();



    public String goPrevAlbum();



    public String peekNextTrack();



    public String goNextTrack();



    public String peekPrevTrack();



    public String goPrevTrack();



    public String getCurrentSongFile();



    public String getCurrentSongInfo();

}