1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 6660470
  27  * @summary Tests that sequencer correctly opens/closes (implicitly) devices
  28  * @author Alex Menkov
  29  */
  30 
  31 import java.util.List;
  32 import javax.sound.midi.MidiDevice;
  33 import javax.sound.midi.MidiDeviceReceiver;
  34 import javax.sound.midi.MidiSystem;
  35 import javax.sound.midi.MidiUnavailableException;
  36 import javax.sound.midi.Receiver;
  37 import javax.sound.midi.Sequencer;
  38 import javax.sound.midi.Transmitter;
  39 
  40 public class SequencerImplicitSynthOpen {
  41 
  42     static int TEST_COUNT   = 5;
  43 
  44     public static void main(String[] args) {
  45         try {
  46             log("getting sequencer...");
  47             Sequencer sequencer = MidiSystem.getSequencer();
  48             log("  - got " + getDeviceStr(sequencer));
  49 
  50             // obtain connected device (usually synthesizer)
  51             MidiDevice synth = getConnectedDevice(sequencer);
  52             if (synth == null) {
  53                 log("could not get connected device, returning");
  54                 return;
  55             }
  56 
  57             log("connected device: " + getDeviceStr(synth));
  58 
  59             int success = 0;
  60             for (int i=0; i<TEST_COUNT; i++) {
  61                 if (test(sequencer)) {
  62                     success++;
  63                 }
  64             }
  65 
  66             if (success != TEST_COUNT) {
  67                 throw new RuntimeException("test FAILS");
  68             }
  69         } catch (MidiUnavailableException ex) {
  70             // this is not a failure
  71             log("Could not get Sequencer");
  72         }
  73         log("test PASSED.");
  74     }
  75 
  76     static boolean test(Sequencer sequencer) throws MidiUnavailableException {
  77         log("");
  78         log("opening sequencer...");
  79         sequencer.open();   // opens connected synthesizer implicitly
  80         MidiDevice synth = getConnectedDevice(sequencer);
  81         log("  connected device: " + getDeviceStr(synth));
  82 
  83         log("closing sequencer...");
  84         sequencer.close();  // closes the synth implicitly
  85         log("  synth is " + getDeviceStr(synth));
  86         MidiDevice synth2 = getConnectedDevice(sequencer);
  87         log("  currently connected device: " + getDeviceStr(synth2));
  88 
  89         if (synth != null && synth.isOpen()) {
  90             log("FAIL.");
  91             return false;
  92         }
  93         log("OK.");
  94         return true;
  95     }
  96 
  97     static MidiDevice getConnectedDevice(Sequencer sequencer) {
  98         List<Transmitter> trans = sequencer.getTransmitters();
  99         log("  sequencer has " + trans.size() + " opened transmitters:");
 100         for (Transmitter tr: trans) {
 101             Receiver r = tr.getReceiver();
 102             log("    " + getClassStr(tr) + " connected to " + getClassStr(r));
 103             if (r instanceof MidiDeviceReceiver) {
 104                 MidiDeviceReceiver recv = (MidiDeviceReceiver)r;
 105                 MidiDevice dev = recv.getMidiDevice();
 106                 log("      - receiver of " + getClassStr(dev));
 107                 return dev;
 108             } else {
 109                 log("      - does NOT implement MidiDeviceReceiver");
 110             }
 111         }
 112         return null;
 113     }
 114 
 115     static String getClassStr(Object o) {
 116         if (o == null) {
 117             return "<null>";
 118         }
 119         return o.getClass().getName();
 120     }
 121 
 122     static String getDeviceStr(MidiDevice dev) {
 123         if (dev == null) {
 124             return "NULL";
 125         }
 126         return getClassStr(dev) + ", " + (dev.isOpen() ? "OPENED" : "CLOSED");
 127     }
 128 
 129     static void log(String s) {
 130         System.out.println(s);
 131     }
 132 
 133 }