1 /*

     2  * Copyright (c) 2014, 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.util.Collection;

    25 import java.util.HashSet;

    26 

    27 import javax.sound.midi.MidiDevice;

    28 import javax.sound.midi.MidiSystem;

    29 import javax.sound.midi.MidiUnavailableException;

    30 import javax.sound.midi.spi.MidiDeviceProvider;

    31 

    32 import static java.util.ServiceLoader.load;

    33 

    34 /**

    35  * @test

    36  * @bug 8058115

    37  * @summary MidiDeviceProvider shouldn't returns incorrect results or throw NPE

    38  *          in case of null MidiDevice.Info

    39  * @author Sergey Bylokhov

    40  */

    41 public final class NullInfo {

    42 

    43     public static void main(final String[] args) {

    44         // MidiSystem API

    45         try {

    46             MidiSystem.getMidiDevice(null);

    47             throw new RuntimeException("IllegalArgumentException expected");

    48         } catch (final MidiUnavailableException e) {

    49             throw new RuntimeException("IllegalArgumentException expected", e);

    50         } catch (final IllegalArgumentException ignored) {

    51             // expected

    52         }

    53         // MidiDeviceProvider API

    54         final Collection<String> errors = new HashSet<>();

    55         for (final MidiDeviceProvider mdp : load(MidiDeviceProvider.class)) {

    56             try {

    57                 if (mdp.isDeviceSupported(null)) {

    58                     throw new RuntimeException("null is supported");

    59                 }

    60                 final MidiDevice device = mdp.getDevice(null);

    61                 System.err.println("MidiDevice: " + device);

    62                 throw new RuntimeException("IllegalArgumentException expected");

    63             } catch (final IllegalArgumentException e) {

    64                 errors.add(e.getMessage());

    65             }

    66         }

    67         if (errors.size() != 1) {

    68             throw new RuntimeException("Wrong number of messages:" + errors);

    69         }

    70     }

    71 }