javax.media.protocol

Class URLDataSource

java.lang.Object

javax.media.protocol.DataSource

javax.media.protocol.PullDataSource

javax.media.protocol.URLDataSource

All Implemented Interfaces:

Duration, Controls

public class URLDataSource
extends PullDataSource

A default data-source created directly from a URL using URLConnection.

Field Summary

Fields

Modifier and Type	Field and Description
protected URLConnection	conn
protected boolean	connected
protected ContentDescriptor	contentType

Fields inherited from interface javax.media.Duration

DURATION_UNBOUNDED, DURATION_UNKNOWN

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	URLDataSource() Implemented by subclasses.
	URLDataSource(URL url) Construct a URLDataSource directly from a URL.

Method Summary

Methods

Modifier and Type	Method and Description
void	connect() Initialize the connection with the source.
void	disconnect() Disconnect the source.
String	getContentType() Return the content type name.
Object	getControl(String controlName) Returns null, because this source doesn't provide any controls.
Object[]	getControls() Returns an empty array, because this source doesn't provide any controls.
Time	getDuration() Returns Duration.DURATION_UNKNOWN.
PullSourceStream[]	getStreams() Get the collection of streams that this source manages.
void	start() Initiate data-transfer.
void	stop() Stops the

Methods inherited from class javax.media.protocol.DataSource

getLocator, initCheck, setLocator

Methods inherited from class java.lang.Object

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

Field Detail

conn

protected URLConnection conn

contentType

protected ContentDescriptor contentType

connected

protected boolean connected

Constructor Detail

URLDataSource

protected URLDataSource()

Implemented by subclasses.

URLDataSource

public URLDataSource(URL url)
              throws IOException

Construct a URLDataSource directly from a URL.

Throws:

IOException

Method Detail

getStreams

public PullSourceStream[] getStreams()

Description copied from class: PullDataSource

Get the collection of streams that this source manages. The collection of streams is entirely content dependent. The MIME type of this DataSource provides the only indication of what streams can be available on this connection.

Specified by:

getStreams in class PullDataSource

Returns:

The collection of streams for this source.

connect

public void connect()
             throws IOException

Initialize the connection with the source.

Specified by:

connect in class DataSource

Throws:

IOException - Thrown if there are problems setting up the connection.

getContentType

public String getContentType()

Return the content type name.

Specified by:

getContentType in class DataSource

Returns:

The content type name.

disconnect

public void disconnect()

Disconnect the source.

Specified by:

disconnect in class DataSource

start

public void start()
           throws IOException

Description copied from class: DataSource

Initiate data-transfer. The start method must be called before data is available. (You must call connect before calling start.)

Specified by:

start in class DataSource

Throws:

IOException - Thrown if there are IO problems with the source when start is called.

stop

public void stop()
          throws IOException

Stops the

Specified by:

stop in class DataSource

Throws:

IOException

getDuration

public Time getDuration()

Returns Duration.DURATION_UNKNOWN. The duration is not available from an InputStream.

Returns:

Duration.DURATION_UNKNOWN.

getControls

public Object[] getControls()

Returns an empty array, because this source doesn't provide any controls.

Returns:

empty Object array.

getControl

public Object getControl(String controlName)

Returns null, because this source doesn't provide any controls.

Returns:

the object that implements the control, or null.