/*

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/**

 * @test

 * @bug 6660470

 * @summary Tests that sequencer correctly opens/closes (implicitly) devices

 * @author Alex Menkov

 */

import java.util.List;

import javax.sound.midi.MidiDevice;

import javax.sound.midi.MidiDeviceReceiver;

import javax.sound.midi.MidiSystem;

import javax.sound.midi.MidiUnavailableException;

import javax.sound.midi.Receiver;

import javax.sound.midi.Sequencer;

import javax.sound.midi.Transmitter;

public class SequencerImplicitSynthOpen {

    static int TEST_COUNT   = 5;

    public static void main(String[] args) {

        try {

            log("getting sequencer...");

            Sequencer sequencer = MidiSystem.getSequencer();

            log("  - got " + getDeviceStr(sequencer));

            // obtain connected device (usually synthesizer)

            MidiDevice synth = getConnectedDevice(sequencer);

            if (synth == null) {

                log("could not get connected device, returning");

                return;

            }

            log("connected device: " + getDeviceStr(synth));

            int success = 0;

            for (int i=0; i<TEST_COUNT; i++) {

                if (test(sequencer)) {

                    success++;

                }

            }

            if (success != TEST_COUNT) {

                throw new RuntimeException("test FAILS");

            }

        } catch (MidiUnavailableException ex) {

            // this is not a failure

            log("Could not get Sequencer");

        }

        log("test PASSED.");

    }

    static boolean test(Sequencer sequencer) throws MidiUnavailableException {

        log("");

        log("opening sequencer...");

        sequencer.open();   // opens connected synthesizer implicitly

        MidiDevice synth = getConnectedDevice(sequencer);

        log("  connected device: " + getDeviceStr(synth));

        log("closing sequencer...");

        sequencer.close();  // closes the synth implicitly

        log("  synth is " + getDeviceStr(synth));

        MidiDevice synth2 = getConnectedDevice(sequencer);

        log("  currently connected device: " + getDeviceStr(synth2));

        if (synth != null && synth.isOpen()) {

            log("FAIL.");

            return false;

        }

        log("OK.");

        return true;

    }

    static MidiDevice getConnectedDevice(Sequencer sequencer) {

        List<Transmitter> trans = sequencer.getTransmitters();

        log("  sequencer has " + trans.size() + " opened transmitters:");

        for (Transmitter tr: trans) {

            Receiver r = tr.getReceiver();

            log("    " + getClassStr(tr) + " connected to " + getClassStr(r));

            if (r instanceof MidiDeviceReceiver) {

                MidiDeviceReceiver recv = (MidiDeviceReceiver)r;

                MidiDevice dev = recv.getMidiDevice();

                log("      - receiver of " + getClassStr(dev));

                return dev;

            } else {

                log("      - does NOT implement MidiDeviceReceiver");

            }

        }

        return null;

    }

    static String getClassStr(Object o) {

        if (o == null) {

            return "<null>";

        }

        return o.getClass().getName();

    }

    static String getDeviceStr(MidiDevice dev) {

        if (dev == null) {

            return "NULL";

        }

        return getClassStr(dev) + ", " + (dev.isOpen() ? "OPENED" : "CLOSED");

    }

    static void log(String s) {

        System.out.println(s);

    }

}