java.awt.dnd
Class DropTargetContext.TransferableProxy

java.lang.Object
  java.awt.dnd.DropTargetContext.TransferableProxy

All Implemented Interfaces:

Transferable

Enclosing class:

DropTargetContext

protected class DropTargetContext.TransferableProxy

extends Object

implements Transferable

TransferableProxy is a helper inner class that implements Transferable interface and serves as a proxy for another Transferable object which represents data transfer for a particular drag-n-drop operation.

The proxy forwards all requests to the encapsulated transferable and automatically performs additional conversion on the data returned by the encapsulated transferable in case of local transfer.

Field Summary

protected boolean	isLocal A boolean indicating if the encapsulated Transferable object represents the result of local drag-n-drop operation (within the same JVM).
private sun.awt.datatransfer.TransferableProxy	proxy
protected Transferable	transferable The encapsulated Transferable object.

Constructor Summary

(package private)

DropTargetContext.TransferableProxy(Transferable t, boolean local) Constructs a TransferableProxy given a specified Transferable object representing data transfer for a particular drag-n-drop operation and a boolean which indicates whether the drag-n-drop operation is local (within the same JVM).

Method Summary

Object	getTransferData(DataFlavor df) Returns an object which represents the data provided by the encapsulated transferable for the requested data flavor.
DataFlavor[]	getTransferDataFlavors() Returns an array of DataFlavor objects indicating the flavors the data can be provided in by the encapsulated transferable.
boolean	isDataFlavorSupported(DataFlavor flavor) Returns whether or not the specified data flavor is supported by the encapsulated transferable.

Methods inherited from class java.lang.Object

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

Field Detail

transferable

protected Transferable transferable

The encapsulated Transferable object.

isLocal

protected boolean isLocal

A boolean indicating if the encapsulated Transferable object represents the result of local drag-n-drop operation (within the same JVM).

proxy

private sun.awt.datatransfer.TransferableProxy proxy

Constructor Detail

DropTargetContext.TransferableProxy

DropTargetContext.TransferableProxy(Transferable t,
                                    boolean local)

Constructs a TransferableProxy given a specified Transferable object representing data transfer for a particular drag-n-drop operation and a boolean which indicates whether the drag-n-drop operation is local (within the same JVM).

Parameters:

t - the Transferable object

local - true, if t represents the result of local drag-n-drop operation

Method Detail

getTransferDataFlavors

public DataFlavor[] getTransferDataFlavors()

Returns an array of DataFlavor objects indicating the flavors the data can be provided in by the encapsulated transferable.

Specified by:

getTransferDataFlavors in interface Transferable

Returns:

an array of data flavors in which the data can be provided by the encapsulated transferable

isDataFlavorSupported

public boolean isDataFlavorSupported(DataFlavor flavor)

Returns whether or not the specified data flavor is supported by the encapsulated transferable.

Specified by:

isDataFlavorSupported in interface Transferable

Parameters:

flavor - the requested flavor for the data

Returns:

true if the data flavor is supported, false otherwise

getTransferData

public Object getTransferData(DataFlavor df)
                       throws UnsupportedFlavorException,
                              IOException

Returns an object which represents the data provided by the encapsulated transferable for the requested data flavor.

In case of local transfer a serialized copy of the object returned by the encapsulated transferable is provided when the data is requested in application/x-java-serialized-object data flavor.

Specified by:

getTransferData in interface Transferable

Parameters:

df - the requested flavor for the data

Throws:

IOException - if the data is no longer available in the requested flavor.

UnsupportedFlavorException - if the requested data flavor is not supported.

See Also:

DataFlavor.getRepresentationClass()