/**
* @see prefuse.data.column.Column#set(java.lang.Object, int)
*/
public void set(Object val, int row) throws DataTypeException {
if ( m_readOnly ) {
throw new DataReadOnlyException();
} else if ( val != null ) {
if ( val instanceof Date ) {
setLong(((Date)val).getTime(), row);
} else if ( val instanceof Number ) {
setLong(((Number)val).longValue(), row);