javazoom.jl.player.FactoryRegistry Maven / Gradle / Ivy
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/*
* 11/19/04 1.0 moved to LGPL.
* 29/01/00 Initial version. [email protected]
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package javazoom.jl.player;
import java.util.Enumeration;
import java.util.Hashtable;
import javazoom.jl.decoder.JavaLayerException;
/**
* The FactoryRegistry class stores the factories
* for all the audio device implementations available in the system.
*
* Instances of this class are thread-safe.
*
* @since 0.0.8
* @author Mat McGowan
*/
public class FactoryRegistry extends AudioDeviceFactory
{
static private FactoryRegistry instance = null;
static synchronized public FactoryRegistry systemRegistry()
{
if (instance==null)
{
instance = new FactoryRegistry();
instance.registerDefaultFactories();
}
return instance;
}
protected Hashtable factories = new Hashtable();
/**
* Registers an AudioDeviceFactory instance
* with this registry.
*/
public void addFactory(AudioDeviceFactory factory)
{
factories.put(factory.getClass(), factory);
}
public void removeFactoryType(Class cls)
{
factories.remove(cls);
}
public void removeFactory(AudioDeviceFactory factory)
{
factories.remove(factory.getClass());
}
public AudioDevice createAudioDevice() throws JavaLayerException
{
AudioDevice device = null;
AudioDeviceFactory[] factories = getFactoriesPriority();
if (factories==null)
throw new JavaLayerException(this+": no factories registered");
JavaLayerException lastEx = null;
for (int i=0; (device==null) && (i