1 /*

     2  * Copyright (c) 2004, 2016, 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 import java.io.ByteArrayInputStream;

    25 import java.io.ByteArrayOutputStream;

    26 import java.io.InputStream;

    27 

    28 import javax.sound.midi.MidiEvent;

    29 import javax.sound.midi.MidiSystem;

    30 import javax.sound.midi.Sequence;

    31 import javax.sound.midi.ShortMessage;

    32 import javax.sound.midi.Track;

    33 

    34 /**

    35  * @test

    36  * @bug 5048381

    37  * @summary NPE when writing a sequence with a realtime MIDI message

    38  */

    39 public class WriteRealTimeMessageNPE {

    40 

    41     public static void main(String args[]) throws Exception {

    42         System.out.println("5048381: NullPointerException when saving a MIDI sequence");

    43         boolean npeThrown = false;

    44         boolean noEx = false;

    45 

    46         Sequence seq = new Sequence(Sequence.PPQ, 384, 1);

    47         Track t = seq.getTracks()[0];

    48         ShortMessage msg = new ShortMessage();

    49         msg.setMessage(0xF8, 0, 0);

    50         t.add(new MidiEvent(msg, 0));

    51 

    52         ByteArrayOutputStream out = new ByteArrayOutputStream();

    53         try {

    54             MidiSystem.write(seq, 0, out);

    55             noEx = true;

    56         } catch (NullPointerException npe) {

    57             npeThrown = true;

    58             System.out.println("## Failed: Threw unexpected NPE: "+npe);

    59             throw new Exception("Test FAILED!");

    60         } catch (Exception e) {

    61             System.out.println("Threw unexpected Exception: "+e);

    62             System.out.println("But at least did not throw NPE...");

    63         }

    64         if (noEx) {

    65             InputStream is = new ByteArrayInputStream(out.toByteArray());

    66             seq = MidiSystem.getSequence(is);

    67             System.out.println("Sequence has "+seq.getTracks().length+" tracks.");

    68             if (seq.getTracks().length > 0) {

    69                 System.out.println("Track 0 has "+seq.getTracks()[0].size()+" events.");

    70             }

    71         }

    72         System.out.println("Test passed.");

    73     }

    74 }