01: /*
02: * $RCSfile: AudioDeviceEnumerator.java,v $
03: *
04: * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
06: *
07: * This code is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License version 2 only, as
09: * published by the Free Software Foundation. Sun designates this
10: * particular file as subject to the "Classpath" exception as provided
11: * by Sun in the LICENSE file that accompanied this code.
12: *
13: * This code is distributed in the hope that it will be useful, but WITHOUT
14: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: * version 2 for more details (a copy is included in the LICENSE file that
17: * accompanied this code).
18: *
19: * You should have received a copy of the GNU General Public License version
20: * 2 along with this work; if not, write to the Free Software Foundation,
21: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
22: *
23: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
24: * CA 95054 USA or visit www.sun.com if you need additional information or
25: * have any questions.
26: *
27: * $Revision: 1.5 $
28: * $Date: 2008/02/28 20:17:19 $
29: * $State: Exp $
30: */
31:
32: package javax.media.j3d;
33:
34: import java.util.Enumeration;
35: import java.util.NoSuchElementException;
36:
37: /**
38: * The class that enumerates all AudioDevices defined in the environment
39: *
40: * An AudioDeviceEnumerator generates the audio devices defined with the
41: * execution environment of the currently running Java 3D application.
42: */
43:
44: class AudioDeviceEnumerator implements Enumeration {
45:
46: boolean endOfList; // NOTE: list length always equals one or zero
47: AudioDevice device;
48:
49: AudioDeviceEnumerator(PhysicalEnvironment physicalEnvironment) {
50: device = physicalEnvironment.getAudioDevice();
51: if (device == null)
52: endOfList = true;
53: else
54: endOfList = false;
55: }
56:
57: void reset() {
58: if (device != null)
59: endOfList = false;
60: }
61:
62: /**
63: * Query that tells whether the enumerator has more elements
64: * @return true if the enumerator has more elements, false otherwise
65: */
66: public boolean hasMoreElements() {
67: if (endOfList == false)
68: return true;
69: else
70: return false;
71: }
72:
73: /**
74: * Return the next element in the enumerators
75: * @return the next element in this enumerator
76: */
77: public Object nextElement() {
78: if (this .hasMoreElements()) {
79: endOfList = true;
80: return ((Object) device);
81: } else {
82: throw new NoSuchElementException(J3dI18N
83: .getString("AudioDeviceEnumerator0"));
84: }
85: }
86: }
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