Convert a given transferable to a new transferable,
generally one which adds new flavors based on the existing flavors.
The recommended usage is as follows:
public Transferable convert (final Transferable t) {
if (! t.isDataFlavorSupported (fromFlavor)) return t;
if (t.isDataFlavorSupported (toFlavor)) return t;
ExTransferable et = ExTransferable.create (t);
et.put (new ExTransferable.Single (toFlavor) {
public Object getData () throws IOException, UnsupportedFlavorException {
FromObject from = (FromObject) t.getTransferData (fromFlavor);
ToObject to = translateFormats (from);
return to;
}
});
return et;
}
Note that this does not perform the conversion until toFlavor is
actually requested, nor does it advertise toFlavor as being available
unless fromFlavor already was.
You may also want to convert some flavor to a node selection, in which case you should do:
public Transferable convert (final Transferable t) {
if (! t.isDataFlavorSupported (DataFlavor.stringFlavor)) return t;
if (NodeTransfer.findPaste (t) != null) return t;
ExTransferable et = ExTransferable.create (t);
et.put (NodeTransfer.createPaste (new NodeTransfer.Paste () {
public PasteType[] types (Node target) {
if (isSuitable (target)) {
return new PasteType[] { new PasteType () {
public Transferable paste () throws IOException {
try {
String s = (String) t.getTransferData (DataFlavor.stringFlavor);
addNewSubnode (target, s);
} catch (UnsupportedFlavorException ufe) {
throw new IOException (ufe.toString ());
}
return t;
}
}};
} else {
return new PasteType[0];
}
}
}));
return et;
}
Convertors should generally avoid removing flavors from the transferable,
or changing the data for an existing flavor.
- Parameters:
t - the incoming basic transferable- Returns:
- a possible enhanced transferable