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1/*
2 * AudioFormatSet.java
3 *
4 * This file is part of Tritonus: http://www.tritonus.org/
5 */
6
7/*
8 * Copyright (c) 2000 by Florian Bomers <http://www.bomers.de>
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Library General Public License as published
13 * by the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU Library General Public License for more details.
20 *
21 * You should have received a copy of the GNU Library General Public
22 * License along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 */
26
27/*
28|<--- this code is formatted to fit into 80 columns --->|
29*/
30
31package org.tritonus.share.sampled;
32
33import java.util.ArrayList;
34import java.util.Collection;
35import java.util.Iterator;
36
37import javax.sound.sampled.AudioFormat;
38
39import org.tritonus.share.ArraySet;
40import org.tritonus.share.sampled.AudioFormats;
41
42
43/**
44 * A set where the elements are uniquely referenced by
45 * AudioFormats.equals rather than their object reference.
46 * No 2 equal AudioFormats can exist in the set.
47 * <p>
48 * This class provide convenience methods like
49 * <code>getAudioFormat(AudioFormat)</code> and
50 * <code>matches(AudioFormat)</code>.
51 * <p>
52 * The <code>contains(Object elem)</code> and <code>get(Object elem)</code>
53 * fail, if elem is not an instance of AudioFormat.
54 * <p>
55 * You shouldn't use the ArrayList specific functions
56 * like those that take index parameters.
57 * <p>
58 * It is not possible to add <code>null</code> elements.
59 * <p>
60 * Currently, the methods equals(.,.) and matches(.,.) of
61 * class AudioFormats are used. Let's hope that they will
62 * be integrated into AudioFormat.
63 */
64
65public class AudioFormatSet extends ArraySet<AudioFormat>
66{
67 protected static final AudioFormat[] EMPTY_FORMAT_ARRAY = new AudioFormat[0];
68
69 public AudioFormatSet() {
70 super();
71 }
72
73 public AudioFormatSet(Collection<AudioFormat> c) {
74 super(c);
75 }
76
77 public boolean add(AudioFormat elem) {
78 if (elem==null || !(elem instanceof AudioFormat)) {
79 return false;
80 }
81 return super.add(elem);
82 }
83
84 public boolean contains(AudioFormat elem) {
85 if (elem==null || !(elem instanceof AudioFormat)) {
86 return false;
87 }
88 AudioFormat comp=(AudioFormat) elem;
89 Iterator it=iterator();
90 while (it.hasNext()) {
91 if (AudioFormats.equals(comp, (AudioFormat) it.next())) {
92 return true;
93 }
94 }
95 return false;
96 }
97
98 public AudioFormat get(AudioFormat elem) {
99 if (elem==null || !(elem instanceof AudioFormat)) {
100 return null;
101 }
102 AudioFormat comp=(AudioFormat) elem;
103 Iterator it=iterator();
104 while (it.hasNext()) {
105 AudioFormat thisElem=(AudioFormat) it.next();
106 if (AudioFormats.equals(comp, thisElem)) {
107 return thisElem;
108 }
109 }
110 return null;
111 }
112
113 public AudioFormat getAudioFormat(AudioFormat elem) {
114 return (AudioFormat) get(elem);
115 }
116
117 /**
118 * Checks whether this Set contains an AudioFormat
119 * that matches <code>elem</code>.
120 * The first matching format is returned. If no element
121 * matches <code>elem</code>, <code>null</code> is returned.
122 * <p>
123 * @see AudioFormats#matches(AudioFormat, AudioFormat)
124 */
125 public AudioFormat matches(AudioFormat elem) {
126 if (elem==null) {
127 return null;
128 }
129 Iterator it=iterator();
130 while (it.hasNext()) {
131 AudioFormat thisElem=(AudioFormat) it.next();
132 if (AudioFormats.matches(elem, thisElem)) {
133 return thisElem;
134 }
135 }
136 return null;
137 }
138
139
140 // $$mp: TODO: remove; should be obsolete
141 public AudioFormat[] toAudioFormatArray() {
142 return (AudioFormat[]) toArray(EMPTY_FORMAT_ARRAY);
143 }
144
145
146 public void add(int index, AudioFormat element) {
147 throw new UnsupportedOperationException("unsupported");
148 }
149
150 public AudioFormat set(int index, AudioFormat element) {
151 throw new UnsupportedOperationException("unsupported");
152 }
153}
154
155/*** AudioFormatSet.java ***/