9fee0ec4ca
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
129 lines
3.2 KiB
Java
129 lines
3.2 KiB
Java
/*
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* 11/19/04 1.0 moved to LGPL.
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* 29/01/00 Initial version. mdm@techie.com
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*-----------------------------------------------------------------------
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*----------------------------------------------------------------------
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*/
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package javazoom.jl.player;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import javazoom.jl.decoder.JavaLayerException;
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/**
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* The <code>FactoryRegistry</code> class stores the factories
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* for all the audio device implementations available in the system.
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* <p>
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* Instances of this class are thread-safe.
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*
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* @since 0.0.8
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* @author Mat McGowan
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*/
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public class FactoryRegistry extends AudioDeviceFactory
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{
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static private FactoryRegistry instance = null;
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static synchronized public FactoryRegistry systemRegistry()
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{
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if (instance==null)
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{
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instance = new FactoryRegistry();
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instance.registerDefaultFactories();
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}
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return instance;
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}
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protected Hashtable factories = new Hashtable();
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/**
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* Registers an <code>AudioDeviceFactory</code> instance
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* with this registry.
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*/
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public void addFactory(AudioDeviceFactory factory)
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{
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factories.put(factory.getClass(), factory);
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}
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public void removeFactoryType(Class cls)
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{
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factories.remove(cls);
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}
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public void removeFactory(AudioDeviceFactory factory)
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{
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factories.remove(factory.getClass());
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}
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public AudioDevice createAudioDevice() throws JavaLayerException
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{
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AudioDevice device = null;
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AudioDeviceFactory[] factories = getFactoriesPriority();
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if (factories==null)
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throw new JavaLayerException(this+": no factories registered");
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JavaLayerException lastEx = null;
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for (int i=0; (device==null) && (i<factories.length); i++)
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{
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try
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{
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device = factories[i].createAudioDevice();
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}
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catch (JavaLayerException ex)
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{
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lastEx = ex;
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}
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}
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if (device==null && lastEx!=null)
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{
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throw new JavaLayerException("Cannot create AudioDevice", lastEx);
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}
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return device;
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}
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protected AudioDeviceFactory[] getFactoriesPriority()
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{
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AudioDeviceFactory[] fa = null;
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synchronized (factories)
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{
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int size = factories.size();
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if (size!=0)
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{
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fa = new AudioDeviceFactory[size];
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int idx = 0;
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Enumeration e = factories.elements();
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while (e.hasMoreElements())
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{
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AudioDeviceFactory factory = (AudioDeviceFactory)e.nextElement();
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fa[idx++] = factory;
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}
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}
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}
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return fa;
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}
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protected void registerDefaultFactories()
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{
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addFactory(new JavaSoundAudioDeviceFactory());
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}
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}
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