1 /* 2 * Copyright (c) 2015, 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.Objects; 25 26 import javax.sound.midi.MidiDevice; 27 import javax.sound.midi.MidiSystem; 28 import javax.sound.midi.spi.MidiDeviceProvider; 29 30 import static java.util.ServiceLoader.load; 31 32 /** 33 * @test 34 * @bug 8143909 35 * @author Sergey Bylokhov 36 */ 37 public final class ExpectedNPEOnNull { 38 39 public static void main(final String[] args) throws Exception { 40 testMS(); 41 for (final MidiDeviceProvider mdp : load(MidiDeviceProvider.class)) { 42 testMDP(mdp); 43 } 44 testMDP(customMDP); 45 } 46 47 /** 48 * Tests the part of MidiSystem API, which implemented via 49 * MidiDeviceProvider. 50 */ 51 private static void testMS() throws Exception { 52 // MidiSystem#getMidiDevice(MidiDevice.Info) 53 try { 54 MidiSystem.getMidiDevice(null); 55 throw new RuntimeException("NPE is expected"); 56 } catch (final NullPointerException ignored) { 57 } 58 } 59 60 /** 61 * Tests the MidiDeviceProvider API directly. 62 */ 63 private static void testMDP(final MidiDeviceProvider mdp) throws Exception { 64 // MidiDeviceProvider#isDeviceSupported(Info) 65 try { 66 mdp.isDeviceSupported(null); 67 throw new RuntimeException("NPE is expected"); 68 } catch (final NullPointerException ignored) { 69 } 70 // MidiDeviceProvider#getDevice(Info) 71 try { 72 mdp.getDevice(null); 73 throw new RuntimeException("NPE is expected"); 74 } catch (final NullPointerException ignored) { 75 } 76 } 77 78 /** 79 * Tests some default implementation of MidiDeviceProvider API, using the 80 * custom {@code MidiDeviceProvider}, which support nothing. 81 */ 82 static MidiDeviceProvider customMDP = new MidiDeviceProvider() { 83 @Override 84 public MidiDevice.Info[] getDeviceInfo() { 85 return new MidiDevice.Info[0]; 86 } 87 88 @Override 89 public MidiDevice getDevice(MidiDevice.Info info) { 90 Objects.requireNonNull(info); 91 return null; 92 } 93 }; 94 }