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package javax.sound.sampled.spi;

import java.util.Objects;

import javax.sound.sampled.Mixer;


A provider or factory for a particular mixer type. This mechanism allows the
implementation to determine how resources are managed in creation /
management of a mixer.

Author:Kara Kytle
Since:1.3
/**
 * A provider or factory for a particular mixer type. This mechanism allows the
 * implementation to determine how resources are managed in creation /
 * management of a mixer.
 *
 * @author Kara Kytle
 * @since 1.3
 */
public abstract class MixerProvider {

    
Indicates whether the mixer provider supports the mixer represented by
the specified mixer info object.

 The full set of mixer info objects that represent the mixers supported by this MixerProvider may be obtained through the getMixerInfo method. 
Params:
  • info – an info object that describes the mixer for which support is
        queried
Throws:
See Also:
Returns:true if the specified mixer is supported, otherwise false
/**
     * Indicates whether the mixer provider supports the mixer represented by
     * the specified mixer info object.
     * <p>
     * The full set of mixer info objects that represent the mixers supported by
     * this {@code MixerProvider} may be obtained through the
     * {@code getMixerInfo} method.
     *
     * @param  info an info object that describes the mixer for which support is
     *         queried
     * @return {@code true} if the specified mixer is supported, otherwise
     *         {@code false}
     * @throws NullPointerException if {@code info} is {@code null}
     * @see #getMixerInfo()
     */
    public boolean isMixerSupported(Mixer.Info info) {
        Objects.requireNonNull(info);

        Mixer.Info infos[] = getMixerInfo();

        for(int i=0; i<infos.length; i++){
            if( info.equals( infos[i] ) ) {
                return true;
            }
        }
        return false;
    }

    
Obtains the set of info objects representing the mixer or mixers provided
by this MixerProvider.

 The isMixerSupported method returns true for all the info objects returned by this method. The corresponding mixer instances for the info objects are returned by the getMixer method. 
See Also:
Returns:a set of mixer info objects
/**
     * Obtains the set of info objects representing the mixer or mixers provided
     * by this MixerProvider.
     * <p>
     * The {@code isMixerSupported} method returns {@code true} for all the info
     * objects returned by this method. The corresponding mixer instances for
     * the info objects are returned by the {@code getMixer} method.
     *
     * @return a set of mixer info objects
     * @see #getMixer(Mixer.Info)
     * @see #isMixerSupported(Mixer.Info)
     */
    public abstract Mixer.Info[] getMixerInfo();

    
Obtains an instance of the mixer represented by the info object. If null is passed, then the default mixer will be returned. 
 The full set of the mixer info objects that represent the mixers supported by this MixerProvider may be obtained through the getMixerInfo method. Use the isMixerSupported method to test whether this MixerProvider supports a particular mixer. 
Params:
  • info – an info object that describes the desired mixer, or null for the default mixer
Throws:
  • IllegalArgumentException – if the info object specified does not match the info object for a mixer supported by this MixerProvider, or if this MixerProvider does not have default mixer, but default mixer has been requested
See Also:
Returns:mixer instance
/**
     * Obtains an instance of the mixer represented by the info object. If
     * {@code null} is passed, then the default mixer will be returned.
     * <p>
     * The full set of the mixer info objects that represent the mixers
     * supported by this {@code MixerProvider} may be obtained through the
     * {@code getMixerInfo} method. Use the {@code isMixerSupported} method to
     * test whether this {@code MixerProvider} supports a particular mixer.
     *
     * @param  info an info object that describes the desired mixer, or
     *         {@code null} for the default mixer
     * @return mixer instance
     * @throws IllegalArgumentException if the info object specified does not
     *         match the info object for a mixer supported by this
     *         {@code MixerProvider}, or if this {@code MixerProvider} does not
     *         have default mixer, but default mixer has been requested
     * @see #getMixerInfo()
     * @see #isMixerSupported(Mixer.Info)
     */
    public abstract Mixer getMixer(Mixer.Info info);
}