Bug 153391 Some Options in Edit Parameter dialog haven't been saved.
Description: Some Options in Edit Parameter dialog haven't been saved. Steps to reproduce: 1. new a parameter, boolean type, tick AllowNUll and sort alphabetically... 2. Close the dialog and reopen it. 3. new a parameter, string, combo-box, tick AllowNull. 4. Close the dialog and reopen it. Expected result: Ticked options' status are saved Actual result: After reopen parameter dialog, options are unticked.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
}
		}
		return null;
	}
	private String getColumnName( String expression )
	{
		for ( Iterator iter = columnList.iterator( ); iter.hasNext( ); )
		{
			ResultSetColumnHandle cachedColumn = (ResultSetColumnHandle) iter.next( );
			if ( DEUtil.getExpression( cachedColumn ).equals( expression ) )
			{
				return cachedColumn.getColumnName( );
			}
		}
		return null;
	}
	private String getInputControlDisplayName( )
	{
		String type = getInputControlType( );
		String displayName = null;
		if ( controlType.findChoice( type ) != null )
		{
			displayName = controlType.findChoice( type ).getDisplayName( );
		}
		else
		{
			if ( PARAM_CONTROL_COMBO.equals( type ) )
			{
				displayName = DISPLAY_NAME_CONTROL_COMBO;
			}