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package javax.sound.midi;



A Receiver receives MidiEvent objects and
typically does something useful in response, such as interpreting them to
generate sound or raw MIDI output.  Common MIDI receivers include
synthesizers and MIDI Out ports.

Author:Kara Kytle
See Also:
/**
 * A <code>Receiver</code> receives <code>{@link MidiEvent}</code> objects and
 * typically does something useful in response, such as interpreting them to
 * generate sound or raw MIDI output.  Common MIDI receivers include
 * synthesizers and MIDI Out ports.
 *
 * @see MidiDevice
 * @see Synthesizer
 * @see Transmitter
 *
 * @author Kara Kytle
 */
public interface Receiver extends AutoCloseable {


    //$$fb 2002-04-12: fix for 4662090: Contradiction in Receiver specification
    
Sends a MIDI message and time-stamp to this receiver.
If time-stamping is not supported by this receiver, the time-stamp
value should be -1.

Params:
  • message – the MIDI message to send
  • timeStamp – the time-stamp for the message, in microseconds.
Throws:
/**
     * Sends a MIDI message and time-stamp to this receiver.
     * If time-stamping is not supported by this receiver, the time-stamp
     * value should be -1.
     * @param message the MIDI message to send
     * @param timeStamp the time-stamp for the message, in microseconds.
     * @throws IllegalStateException if the receiver is closed
     */
    public void send(MidiMessage message, long timeStamp);

    
Indicates that the application has finished using the receiver, and
that limited resources it requires may be released or made available.

If the creation of this Receiver resulted in
implicitly opening the underlying device, the device is
implicitly closed by this method. This is true unless the device is
kept open by other Receiver or Transmitter
instances that opened the device implicitly, and unless the device
has been opened explicitly. If the device this
Receiver is retrieved from is closed explicitly by calling MidiDevice.close, the Receiver is closed, too. For a detailed description of open/close behaviour see the class description of MidiDevice. 
See Also:
/**
     * Indicates that the application has finished using the receiver, and
     * that limited resources it requires may be released or made available.
     *
     * <p>If the creation of this <code>Receiver</code> resulted in
     * implicitly opening the underlying device, the device is
     * implicitly closed by this method. This is true unless the device is
     * kept open by other <code>Receiver</code> or <code>Transmitter</code>
     * instances that opened the device implicitly, and unless the device
     * has been opened explicitly. If the device this
     * <code>Receiver</code> is retrieved from is closed explicitly by
     * calling {@link MidiDevice#close MidiDevice.close}, the
     * <code>Receiver</code> is closed, too.  For a detailed
     * description of open/close behaviour see the class description
     * of {@link javax.sound.midi.MidiDevice MidiDevice}.
     *
     * @see javax.sound.midi.MidiSystem#getReceiver
     */
    public void close();
}