Name: auR10023 Date: 12/15/2000



javax.swing.TransferHandler.createTransferable(JComponent ) method returns null
for JComponent which does not contain property, specified in TransferHandler
constructor.

This behavior is not reflected in the javadoc:

 ...
 createTransferable

 protected Transferable createTransferable(JComponent c)

      Create a Transferable to use as the source for a data transfer.
      Parameters:
           c - The component holding the data to be transfered. This argument is provided to
           enable sharing of TransferHandlers by multiple components.
      Returns:
           The representation of the data to be transfered.
 ...


Here is the example:

 ----------t.java------------
 import java.awt.*;
 import java.awt.datatransfer.*;
 import javax.swing.*;

 public class t{
     public static void main(String [] args) {
         TestComp comp = new TestComp();
         TestHand testHandler = new TestHand("property");
         System.out.println(testHandler.createTransferable(comp));
     }
 }

 class TestHand extends TransferHandler {
     public TestHand(String prop) {
         super(prop);
     }
     public Transferable createTransferable(JComponent c) {
         return super.createTransferable(c);
     }
 }

 class TestComp extends JComponent implements java.io.Serializable {
     // There is no "property"
 }
 -------output------

 null

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