view java/src/uk/ac/qmul/eecs/ccmi/sound/SoundFactory.java @ 1:e3935c01cde2 tip

moved license of PdPersistenceManager to the beginning of the file

/*  
 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
  
 Copyright (C) 2011  Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)

 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 3 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, see <http://www.gnu.org/licenses/>.
*/  

package uk.ac.qmul.eecs.ccmi.sound;

/**
 * The factory class to create {@code Sound} instances. 
 *
 */
public abstract class SoundFactory {
	
	public static Sound createInstance(){
		sound = new BeadsSound();
		return sound;
	}
	
	public static Sound getInstance(){
		if(sound == null)
			throw new IllegalStateException("createInstance() must be called before any getInstance() call");
		return sound;
	}
	
	private static Sound sound;
}