sound.java

非常好的java collapse游戏代码

/*
 * JCollapse - Java Collapse Game
 * Copyright (C) 2005 Erico Gon鏰lves Rimoli
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package sourceforge.net.projects.jcollapse.engine.sound;

import java.net.URL;

public abstract class Sound implements Playable {
	private URL m_Local;

	/**
	 * Constructor
	 * @param local the local of resource
	 */
	public Sound( URL local ) {
		setLocal( local );
	}
	
	/**
	 * Get the local of sound resource
	 * @return the local of sound resource
	 */
	public URL getLocal() {
		return m_Local;
	}
	
	/**
	 * Set the local of sound resource
	 * @param local the local of sound resource
	 */
	public void setLocal( URL local ) {
		if( local == null )
			throw new NullPointerException( "local can't be null" );
		
		if( m_Local == null )
			m_Local = local;
		
		else if( m_Local != null && !m_Local.equals( local ) ) {
			release();
			m_Local = local;
		}
	}
	
	/** 
	 * Return the local of Sound
	 */
	public String toString() {
		return getLocal().toString();
	}
	
	/**
	 * Indicate that sound is initialized or not
	 * @return true if sound is initialized
	 */
	public abstract boolean isInitialized();
	
	/**
	 * Create a new Sound instance by resource and type
	 * Ex: Sound s = Sound.createSoundInstance( new URL( "file:/tmp/snd.wave" ), Playable.TYPE_WAVE );
	 * @param local the resource location
	 * @param soundType the Sound type. Ex: Playable.TYPE_WAVE, Playable.TYPE_MIDI
	 * @return the new instance of Sound
	 */
	public synchronized static Sound createSoundInstance( URL local, int soundType ) {
		switch( soundType ) {
			case Playable.TYPE_WAVE:
				return new Wave( local );
			case Playable.TYPE_MIDI:
				return new Midi( local );
			default:
				return null;
		}
	}
}