org.zkoss.sound
Class AAudio

java.lang.Object
  org.zkoss.sound.AAudio

All Implemented Interfaces:

Serializable, Audio, Media

public class AAudio
extends Object
implements Audio, Serializable

Represents an audio. Unlike javax.sound.AudioClip, this class is used only to hold the raw data as opaque rather than manipulate the sound.

In other words, it is used to retrieve and store the opaque data as polymorphic thru the Media interface.

AAudio is serializable, but, if you are using InputStream, you have to extend this class, and provide the implementation to serialize and deserialize _isdata. (Since 5.0.11)

Author:

tomyeh

See Also:

Serialized Form

Field Summary

protected InputStream	_isdata The raw data in stream (or DYNAMIC_STREAM).
protected static InputStream	DYNAMIC_STREAM Used if you want to implement a media whose input stream is created dynamically each time getStreamData() is called.

Constructor Summary

AAudio(File file)
Constructs an audio with a file.

AAudio(InputStream is)
Creates an instance of an audio with an input stream.

AAudio(String filename)
Constructs an audio with a file name.

AAudio(String name, byte[] data)

AAudio(String name, InputStream isdata)
Creates an instance of an audio with an input stream.

AAudio(URL url)
Constructs an audio with an URL.

Method Summary

byte[]	getByteData() Returns the raw data in byte array.
String	getContentType() Returns the content type, e.g., "image/jpeg", or null if not available.
String	getFormat() Returns the format name, e.g., "jpeg", or null if not available.
String	getName() Returns the name (usually filename) of this media, or null if not available.
Reader	getReaderData() Not supported.
InputStream	getStreamData() Returns the data in the input stream.
String	getStringData() Always throws IllegalStateException.
boolean	inMemory() Returns whether the data is cached in memory (in form of byte[] or String).
boolean	isBinary() Returns whether the format of this content is binary or text-based.

Methods inherited from class java.lang.Object

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

Field Detail

DYNAMIC_STREAM

protected static final InputStream DYNAMIC_STREAM

Used if you want to implement a media whose input stream is created dynamically each time getStreamData() is called.

See Also:

AAudio(String,,InputStream)

_isdata

protected final transient InputStream _isdata

The raw data in stream (or DYNAMIC_STREAM). Exactly one of _data and _isdata is not null.

Constructor Detail

AAudio

public AAudio(String name,
              byte[] data)
       throws IOException

Throws:

IOException

AAudio

public AAudio(String name,
              InputStream isdata)
       throws IOException

Creates an instance of an audio with an input stream. If the stream shall be created each time getStreamData() is called, you can pass DYNAMIC_STREAM to the data argument, and then override getStreamData().

Note: the caller of getStreamData() has to close the returned input stream.

Throws:

IOException

AAudio

public AAudio(URL url)

Constructs an audio with an URL.

AAudio

public AAudio(File file)

Constructs an audio with a file.

AAudio

public AAudio(String filename)
       throws IOException

Constructs an audio with a file name.

Throws:

IOException

AAudio

public AAudio(InputStream is)
       throws IOException

Creates an instance of an audio with an input stream. If the stream shall be created each time getStreamData() is called, you can pass DYNAMIC_STREAM to the data argument, and then override getStreamData().

Note: the caller of getStreamData() has to close the returned input stream.

Throws:

IOException

Method Detail

isBinary

public final boolean isBinary()

Description copied from interface: Media

Returns whether the format of this content is binary or text-based. If true, use Media.getByteData() or Media.getStreamData() to retrieve its content. If false, use Media.getStringData() or Media.getReaderData() to retrieve its content.

Specified by:

isBinary in interface Media

See Also:

Media.getStringData(), Media.getByteData(), Media.getReaderData(), Media.getStreamData()

inMemory

public final boolean inMemory()

Description copied from interface: Media

Returns whether the data is cached in memory (in form of byte[] or String).

Specified by:

inMemory in interface Media

See Also:

Media.getStringData(), Media.getByteData(), Media.getReaderData(), Media.getStreamData()

getByteData

public byte[] getByteData()

Description copied from interface: Media

Returns the raw data in byte array.

It might not be a copy, so don't modify it directly unless you know what you are doing.

If the data is not cached in memory (Media.inMemory() return false), the data will be read from Media.getStreamData(). Furthermore, it also implies you can not invoke this method again.

Specified by:

getByteData in interface Media

See Also:

Media.getStringData()

getStringData

public final String getStringData()

Always throws IllegalStateException.

Specified by:

getStringData in interface Media

See Also:

Media.getByteData()

getStreamData

public InputStream getStreamData()

Returns the data in the input stream.

Note: the caller has to invoke InputStream.close() after using the input stream returned by getStreamData().

Specified by:

getStreamData in interface Media

See Also:

Media.getReaderData()

getReaderData

public final Reader getReaderData()

Not supported. It always throws IllegalStateException.

Specified by:

getReaderData in interface Media

See Also:

Media.getStreamData()

getName

public final String getName()

Description copied from interface: Media

Returns the name (usually filename) of this media, or null if not available.

Specified by:

getName in interface Media

getFormat

public String getFormat()

Description copied from interface: Media

Returns the format name, e.g., "jpeg", or null if not available.

Specified by:

getFormat in interface Media

See Also:

Media.getContentType()

getContentType

public String getContentType()

Description copied from interface: Media

Returns the content type, e.g., "image/jpeg", or null if not available.

Specified by:

getContentType in interface Media

See Also:

Media.getFormat()