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package javax.sound.midi.spi;

import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiUnavailableException;


A MidiDeviceProvider is a factory or provider for a particular
type of MIDI device.
This mechanism allows the implementation to determine
how resources are managed in the creation and management of
a device.

Author:Kara Kytle
/**
 * A <code>MidiDeviceProvider</code> is a factory or provider for a particular
 * type of MIDI device.
 * This mechanism allows the implementation to determine
 * how resources are managed in the creation and management of
 * a device.
 *
 * @author Kara Kytle
 */
public abstract class MidiDeviceProvider {


    
Indicates whether the device provider supports the device represented by
the specified device info object.

Params:
  • info – an info object that describes the device for which support is queried
Returns:true if the specified device is supported,
otherwise false
/**
     * Indicates whether the device provider supports the device represented by
     * the specified device info object.
     * @param info an info object that describes the device for which support is queried
     * @return <code>true</code> if the specified device is supported,
     * otherwise <code>false</code>
     */
    public boolean isDeviceSupported(MidiDevice.Info info) {

        MidiDevice.Info infos[] = getDeviceInfo();

        for(int i=0; i<infos.length; i++) {
            if( info.equals( infos[i] ) ) {
                return true;
            }
        }
        return false;
    }


    
Obtains the set of info objects representing the device
or devices provided by this MidiDeviceProvider.

Returns:set of device info objects
/**
     * Obtains the set of info objects representing the device
     * or devices provided by this <code>MidiDeviceProvider</code>.
     * @return set of device info objects
     */
    public abstract MidiDevice.Info[] getDeviceInfo();


    
Obtains an instance of the device represented by the info object.

Params:
  • info – an info object that describes the desired device
Throws:
  • IllegalArgumentException – if the info object specified does not
match the info object for a device supported by this MidiDeviceProvider.
Returns:device instance
/**
     * Obtains an instance of the device represented by the info object.
     * @param info an info object that describes the desired device
     * @return device instance
     * @throws IllegalArgumentException if the info object specified does not
     * match the info object for a device supported by this <code>MidiDeviceProvider</code>.
     */
    public abstract MidiDevice getDevice(MidiDevice.Info info);
}