String value = combo.getText( ); if ( value.equals( NONE ) )
String value = null; if ( combo.getSelectionIndex( ) != 0 )
				public void widgetSelected( SelectionEvent event )				{					String value = combo.getText( );					if ( value.equals( NONE ) )					{						value = null;					}					int rCode = canChangeDataSet( value );					if ( rCode == 2 )					{						combo.setText( getDataSetName( ) );					}					else					{						try						{							DataSetHandle dataSet = null;							if ( value != null )							{								dataSet = inputElement.getModuleHandle( )										.findDataSet( value );							}							inputElement.setDataSet( dataSet );							getParameterBindingPropertyHandle( ).clearValue( );							if ( rCode == 0 )							{								inputElement.getColumnBindings( ).clearValue( );							}							generateBindingColumns( );							setHihtLightColumn( );						}						catch ( SemanticException e )						{							ExceptionHandler.handle( e );						}					}				}