1 /*
   2  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   5  * This code is free software; you can redistribute it and/or modify it
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   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
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  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
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  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  23  * questions.
  24  */
  25 
  26 package javax.sound.sampled.spi;
  27 
  28 import javax.sound.sampled.Mixer;
  29 
  30 /**
  31  * A provider or factory for a particular mixer type. This mechanism allows the
  32  * implementation to determine how resources are managed in creation /
  33  * management of a mixer.
  34  *
  35  * @author Kara Kytle
  36  * @since 1.3
  37  */
  38 public abstract class MixerProvider {
  39 
  40     /**
  41      * Indicates whether the mixer provider supports the mixer represented by
  42      * the specified mixer info object.
  43      * <p>
  44      * The full set of mixer info objects that represent the mixers supported by
  45      * this {@code MixerProvider} may be obtained through the
  46      * {@code getMixerInfo} method.
  47      *
  48      * @param  info an info object that describes the mixer for which support is
  49      *         queried
  50      * @return {@code true} if the specified mixer is supported, otherwise
  51      *         {@code false}
  52      * @see #getMixerInfo()
  53      */
  54     public boolean isMixerSupported(Mixer.Info info) {
  55 
  56         Mixer.Info infos[] = getMixerInfo();
  57 
  58         for(int i=0; i<infos.length; i++){
  59             if( info.equals( infos[i] ) ) {
  60                 return true;
  61             }
  62         }
  63         return false;
  64     }
  65 
  66     /**
  67      * Obtains the set of info objects representing the mixer or mixers provided
  68      * by this MixerProvider.
  69      * <p>
  70      * The {@code isMixerSupported} method returns {@code true} for all the info
  71      * objects returned by this method. The corresponding mixer instances for
  72      * the info objects are returned by the {@code getMixer} method.
  73      *
  74      * @return a set of mixer info objects
  75      * @see #getMixer(Mixer.Info)
  76      * @see #isMixerSupported(Mixer.Info)
  77      */
  78     public abstract Mixer.Info[] getMixerInfo();
  79 
  80     /**
  81      * Obtains an instance of the mixer represented by the info object.
  82      * <p>
  83      * The full set of the mixer info objects that represent the mixers
  84      * supported by this {@code MixerProvider} may be obtained through the
  85      * {@code getMixerInfo} method. Use the {@code isMixerSupported} method to
  86      * test whether this {@code MixerProvider} supports a particular mixer.
  87      *
  88      * @param  info an info object that describes the desired mixer
  89      * @return mixer instance
  90      * @throws IllegalArgumentException if the info object specified does not
  91      *         match the info object for a mixer supported by this MixerProvider
  92      * @see #getMixerInfo()
  93      * @see #isMixerSupported(Mixer.Info)
  94      */
  95     public abstract Mixer getMixer(Mixer.Info info);
  96 }