/*
* 11/19/04 1.0 moved to LGPL.
* 29/01/00 Initial version. mdm@techie.com
*-----------------------------------------------------------------------
* 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 javazoom.jl.decoder.JavaLayerException;
/**
* An <code>AudioDeviceFactory</code> class is responsible for creating a
* specific <code>AudioDevice</code> implementation. A factory implementation
* can be as simple or complex as desired and may support just one
* implementation or may return several implementations depending upon the
* execution environment.
* <p>
* When implementing a factory that provides an AudioDevice that uses class that
* may not be present, the factory should dynamically link to any specific
* implementation classes required to instantiate or test the audio
* implementation. This is so that the application as a whole can run without
* these classes being present. The audio device implementation, however, will
* usually statically link to the classes required. (See the JavaSound deivce
* and factory for an example of this.)
*
* @see FactoryRegistry
*
* @since 0.0.8
* @author Mat McGowan
*/
public abstract class AudioDeviceFactory
{
/**
* Creates a new <code>AudioDevice</code>.
*
* @return a new instance of a specific class of <code>AudioDevice</code>.
* @throws JavaLayerException
* if an instance of AudioDevice could not be created.
*/
public abstract AudioDevice createAudioDevice() throws JavaLayerException;
/**
* Creates an instance of an AudioDevice implementation.
*
* @param loader
* The <code>ClassLoader</code> to use to load the named class,
* or null to use the system class loader.
* @param name
* The name of the class to load.
* @return A newly-created instance of the audio device class.
*/
protected AudioDevice instantiate(ClassLoader loader, String name)
throws ClassNotFoundException,
IllegalAccessException,
InstantiationException
{
AudioDevice dev = null;
Class<?> cls = null;
if (loader == null)
{
cls = Class.forName(name);
}
else
{
cls = loader.loadClass(name);
}
Object o = cls.newInstance();
dev = (AudioDevice) o;
return dev;
}
}