IllegalArgumentException is thrown when getReaderForText() is called on the plaintext flavor by passing a StringSelection transferable object.

The getReaderForText() method internally checks if the object returned by the getTransferData(DataFlavor) called on a transferable object is an instance of String or
InputStream. But the StringSelection object returns a StringReader when the getTransferData(DataFlavor) is called by passing the plaintext flavor . And since
StringReader is not an instance of String or InputStream, the getReaderForText() method throws the IllrgalArgumentException.

This exception is not thrown when a user defined transferable object is used. In the user defined transferable object the getTransferableObject(DataFlavor)
returns a ByteArrayInputStream object when called by passing a plaintext flavor.
As the ByteArrayInputStream is an instance of InputStream, the getReaderForText() method doesn't throw the exception.

In Windows: When getReaderForText() is called on the plaintext flavor by passing a StringSelection transferable object, the IllegalArgumentException is thrown.

In Solaris: When getReaderForText() is called on the plaintext flavor by passing a StringSelection transferable object, the IllegalArgumentException is thrown.

Testcase that reproduces this bug:

1)getReaderExample.java : This is a sample test case which contains a inner class(TextTransferable) that implements the Transferable interface.

To Run the sample program :

1) Run the getReaderExample.class
2) Check the output at the terminal.

Note: Run the test case using StringSelection object as well as TextTransferable object ( by commenting and uncommenting the necessary line in the
getReaderExample() constructor ).
  

Suggestion:

The getTransferData() of the StringSelection class should return an object which is an instance of InputStream, instead of returning the StringReader object.

Code taken from java.awt.datatransfer.StringSelection

----------------------
---------------------
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public synchronized Object getTransferData(DataFlavor dataflavor)
        throws UnsupportedFlavorException, IOException
    {
        if(dataflavor.equals(flavors[0]))
            return data;
        if(dataflavor.equals(flavors[1]))
            return new StringReader(data);

            /*****************************************************************/
            /** Instead of returning the StringReader, an ByteArrayInputStream can be returned **/

                byte[] textBytes = null;
                String encoding = dataflavor.getParameter("charset");

                if (encoding == null) {
                    textBytes = text.getBytes();
                } else {
                    textBytes = text.getBytes(encoding);
                }

                ByteArrayInputStream sbis = new ByteArrayInputStream(textBytes);
                return sbis;

            /*****************************************************************/

        else
            throw new UnsupportedFlavorException(dataflavor);
    }

###@###.### 1999-10-21