javax.activation

Class DataHandler

public class DataHandler extends Object implements Transferable

Handler for data available in multiple sources and formats.

Constructor Summary
	DataHandler(DataSource ds) Constructor in which the data is read from a data source.
	DataHandler(Object obj, String mimeType) Constructor using a reified object representation.
	DataHandler(URL url) Constructor in which the data is read from a URL.

Method Summary
CommandInfo[]	getAllCommands() Returns the complete list of commands for this type of data.
Object	getBean(CommandInfo cmdInfo) Returns the instantiated bean using the specified command.
CommandInfo	getCommand(String cmdName) Returns the specified command.
Object	getContent() Returns the data as a reified object.
String	getContentType() Returns the MIME type of the data (with parameters).
DataSource	getDataSource() Returns the data source from which data is read.
InputStream	getInputStream() Returns an input stream from which the data can be read.
String	getName() Returns the name of the data object if created with a DataSource.
OutputStream	getOutputStream() Returns an output stream that can be used to overwrite the underlying data, if the DataSource constructor was used.
CommandInfo[]	getPreferredCommands() Returns the preferred commands for this type of data.
Object	getTransferData(DataFlavor flavor) Returns an object representing the data to be transferred.
DataFlavor[]	getTransferDataFlavors() Returns the data flavors in which this data is available.
boolean	isDataFlavorSupported(DataFlavor flavor) Indicates whether the specified data flavor is supported for this data.
void	setCommandMap(CommandMap commandMap) Sets the command map to be used by this data handler.
static void	setDataContentHandlerFactory(DataContentHandlerFactory newFactory) Sets the data content handler factory.
void	writeTo(OutputStream os) Writes the data as a byte stream.

Constructor Detail

DataHandler

public DataHandler(DataSource ds)

Constructor in which the data is read from a data source.

Parameters: ds the data source

DataHandler

public DataHandler(Object obj, String mimeType)

Constructor using a reified object representation.

Parameters: obj the object representation of the data mimeType the MIME type of the object

DataHandler

public DataHandler(URL url)

Constructor in which the data is read from a URL.

Parameters: url the URL

Method Detail

getAllCommands

public CommandInfo[] getAllCommands()

Returns the complete list of commands for this type of data.

getBean

public Object getBean(CommandInfo cmdInfo)

Returns the instantiated bean using the specified command.

Parameters: cmdInfo the command to instantiate the bean with

getCommand

public CommandInfo getCommand(String cmdName)

Returns the specified command.

Parameters: cmdName the command name

getContent

public Object getContent()

Returns the data as a reified object.

getContentType

public String getContentType()

Returns the MIME type of the data (with parameters).

getDataSource

public DataSource getDataSource()

Returns the data source from which data is read.

getInputStream

public InputStream getInputStream()

Returns an input stream from which the data can be read.

getName

public String getName()

Returns the name of the data object if created with a DataSource.

getOutputStream

public OutputStream getOutputStream()

Returns an output stream that can be used to overwrite the underlying data, if the DataSource constructor was used.

getPreferredCommands

public CommandInfo[] getPreferredCommands()

Returns the preferred commands for this type of data.

getTransferData

public Object getTransferData(DataFlavor flavor)

Returns an object representing the data to be transferred.

Parameters: flavor the requested data flavor

getTransferDataFlavors

public DataFlavor[] getTransferDataFlavors()

Returns the data flavors in which this data is available.

isDataFlavorSupported

public boolean isDataFlavorSupported(DataFlavor flavor)

Indicates whether the specified data flavor is supported for this data.

setCommandMap

public void setCommandMap(CommandMap commandMap)

Sets the command map to be used by this data handler. Setting to null uses the default command map.

Parameters: commandMap the command map to use

setDataContentHandlerFactory

public static void setDataContentHandlerFactory(DataContentHandlerFactory newFactory)

Sets the data content handler factory. If the factory has already been set, throws an Error.

Parameters: newFactory the factory to set

writeTo

public void writeTo(OutputStream os)

Writes the data as a byte stream.

Parameters: os the stream to write to