Module java.desktop
Package javax.sound.sampled.spi

# Class MixerProvider

java.lang.Object
javax.sound.sampled.spi.MixerProvider

public abstract class MixerProvider extends Object
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.

Since:
  1.3

## Constructor Summary

Constructors
Modifier
Constructor
Description
`protected`
`MixerProvider()`
Constructor for subclasses to call.

## Method Summary

Modifier and Type
Method
Description
`abstract Mixer`
`getMixer(Mixer.Info info)`
Obtains an instance of the mixer represented by the info object.
`abstract Mixer.Info[]`
`getMixerInfo()`
Obtains the set of info objects representing the mixer or mixers provided by this MixerProvider.
`boolean`
`isMixerSupported(Mixer.Info info)`
Indicates whether the mixer provider supports the mixer represented by the specified mixer info object.

### Methods declared in class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

## Constructor Details

### MixerProvider

protected MixerProvider()
Constructor for subclasses to call.

## Method Details

### isMixerSupported

public boolean isMixerSupported(Mixer.Info info)
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.

Parameters:
  `info` - an info object that describes the mixer for which support is queried
Returns:
  `true` if the specified mixer is supported, otherwise `false`
Throws:
  `NullPointerException` - if `info` is `null`
See Also:
  - `getMixerInfo()`

### getMixerInfo

public abstract Mixer.Info[] getMixerInfo()
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.

Returns:
  a set of mixer info objects
See Also:
  - `getMixer(Mixer.Info)`
  - `isMixerSupported(Mixer.Info)`

### getMixer

public abstract Mixer getMixer(Mixer.Info info)
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.

Parameters:
  `info` - an info object that describes the desired mixer, or `null` for the default mixer
Returns:
  mixer instance
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:
  - `getMixerInfo()`
  - `isMixerSupported(Mixer.Info)`