Class ResourceTransfer
- java.lang.Object
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- org.eclipse.swt.dnd.Transfer
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- org.eclipse.swt.dnd.ByteArrayTransfer
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- org.eclipse.ui.part.ResourceTransfer
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public class ResourceTransfer extends ByteArrayTransfer
TheResourceTransfer
class is used to transfer an array ofIResource
s from one part to another in a drag and drop operation or a cut, copy, paste action.In every drag and drop operation there is a
DragSource
and aDropTarget
. When a drag occurs aTransfer
is used to marshal the drag data from the source into a byte array. If a drop occurs anotherTransfer
is used to marshal the byte array into drop data for the target.When a
CutAction
or aCopyAction
is performed, this transfer is used to place references to the selected resources on theClipboard
. When aPasteAction
is performed, the references on the clipboard are used to move or copy the resources to the selected destination.This class can be used for a
Viewer
or an SWT component directly. A singleton is provided which may be serially reused (seegetInstance
). It is not intended to be subclassed.The amount of resources which can be transferred is limited to
MAX_RESOURCES_TO_TRANSFER
elements.- See Also:
StructuredViewer
,DropTarget
,DragSource
- Restriction:
- This class is not intended to be subclassed by clients.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static ResourceTransfer
getInstance()
Returns the singleton instance.protected int[]
getTypeIds()
Returns the platform specific ids of the data types that can be converted using this transfer agent.protected String[]
getTypeNames()
Returns the platform specific names of the data types that can be converted using this transfer agent.protected void
javaToNative(Object data, TransferData transferData)
This implementation ofjavaToNative
converts a javabyte[]
to a platform specific representation.protected Object
nativeToJava(TransferData transferData)
This implementation ofnativeToJava
converts a platform specific representation of a byte array to a javabyte[]
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Methods inherited from class org.eclipse.swt.dnd.ByteArrayTransfer
getSupportedTypes, isSupportedType
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Methods inherited from class org.eclipse.swt.dnd.Transfer
registerType, validate
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Method Detail
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getInstance
public static ResourceTransfer getInstance()
Returns the singleton instance.- Returns:
- the singleton instance
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getTypeIds
protected int[] getTypeIds()
Description copied from class:Transfer
Returns the platform specific ids of the data types that can be converted using this transfer agent.- Specified by:
getTypeIds
in classTransfer
- Returns:
- the platform specific ids of the data types that can be converted using this transfer agent
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getTypeNames
protected String[] getTypeNames()
Description copied from class:Transfer
Returns the platform specific names of the data types that can be converted using this transfer agent.- Specified by:
getTypeNames
in classTransfer
- Returns:
- the platform specific names of the data types that can be converted using this transfer agent.
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javaToNative
protected void javaToNative(Object data, TransferData transferData)
Description copied from class:ByteArrayTransfer
This implementation ofjavaToNative
converts a javabyte[]
to a platform specific representation.- Overrides:
javaToNative
in classByteArrayTransfer
- Parameters:
data
- a javabyte[]
containing the data to be convertedtransferData
- an emptyTransferData
object that will be filled in on return with the platform specific format of the data- See Also:
Transfer.nativeToJava(org.eclipse.swt.dnd.TransferData)
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nativeToJava
protected Object nativeToJava(TransferData transferData)
Description copied from class:ByteArrayTransfer
This implementation ofnativeToJava
converts a platform specific representation of a byte array to a javabyte[]
.- Overrides:
nativeToJava
in classByteArrayTransfer
- Parameters:
transferData
- the platform specific representation of the data to be converted- Returns:
- a java
byte[]
containing the converted data if the conversion was successful; otherwise null - See Also:
Transfer.javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData)
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