Receiver.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package javax.sound.midi;

/**
 * A {@code Receiver} receives {@link 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 MidiDevice
 * @see Synthesizer
 * @see Transmitter
 */
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.
     *
     * @param  message the MIDI message to send
     * @param  timeStamp the time-stamp for the message, in microseconds
     * @throws IllegalStateException if the receiver is closed
     */
    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.
     * <p>
     * If the creation of this {@code 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 {@code Receiver} or
     * {@code Transmitter} instances that opened the device implicitly, and
     * unless the device has been opened explicitly. If the device this
     * {@code Receiver} is retrieved from is closed explicitly by calling
     * {@link MidiDevice#close MidiDevice.close}, the {@code Receiver} is
     * closed, too. For a detailed description of open/close behaviour see the
     * class description of {@link MidiDevice MidiDevice}.
     *
     * @see javax.sound.midi.MidiSystem#getReceiver
     */
    @Override
    void close();
}