01 /*
02 * Copyright 1999-2003 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.sound.midi.spi;
27
28 import javax.sound.midi.MidiDevice;
29 import javax.sound.midi.MidiUnavailableException;
30
31 /**
32 * A <code>MidiDeviceProvider</code> is a factory or provider for a particular
33 * type of MIDI device.
34 * This mechanism allows the implementation to determine
35 * how resources are managed in the creation and management of
36 * a device.
37 *
38 * @version 1.26 07/05/05
39 * @author Kara Kytle
40 */
41 public abstract class MidiDeviceProvider {
42
43 /**
44 * Indicates whether the device provider supports the device represented by
45 * the specified device info object.
46 * @param info an info object that describes the device for which support is queried
47 * @return <code>true</code> if the specified device is supported,
48 * otherwise <code>false</code>
49 */
50 public boolean isDeviceSupported(MidiDevice.Info info) {
51
52 MidiDevice.Info infos[] = getDeviceInfo();
53
54 for (int i = 0; i < infos.length; i++) {
55 if (info.equals(infos[i])) {
56 return true;
57 }
58 }
59 return false;
60 }
61
62 /**
63 * Obtains the set of info objects representing the device
64 * or devices provided by this <code>MidiDeviceProvider</code>.
65 * @return set of device info objects
66 */
67 public abstract MidiDevice.Info[] getDeviceInfo();
68
69 /**
70 * Obtains an instance of the device represented by the info object.
71 * @param info an info object that describes the desired device
72 * @return device instance
73 * @throws IllegalArgumentException if the info object specified does not
74 * match the info object for a device supported by this <code>MidiDeviceProvider</code>.
75 */
76 public abstract MidiDevice getDevice(MidiDevice.Info info);
77 }
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