Bug 180864 Change Allow Null option in Cascading Group.[0705]
Description: Change Allow Null option in Cascading Group. Build number:2.2.0.v20070404 Steps to reproduce: 1. New a cascading group and add sub parameter. Expected result: Is Required option in cascading group definition dialog. Actual result: Allow null value option in Cascading Group definition dialog Error log:N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
if ( !needFilter || matchDataType( handle, columnHandle ) )
			{
				valueList.add( columnHandle.getColumnName( ) );
			}
		}
		return (String[]) valueList.toArray( new String[0] );
	}
	private DataSetHandle getDataSet( ScalarParameterHandle handle )
	{
		if ( !isSingle( ) )
		{
			if ( handle.getDataSetName( ) != null )
			{
				return getDataSet( handle.getDataSetName( ) );
			}
			return null;
		}
		return inputParameterGroup.getDataSet( );
	}
	private DataSetHandle getDataSet( String name )
	{
		return inputParameterGroup.getModuleHandle( ).findDataSet( name );
	}
	private void setCellEditorItems( )
	{
		( (ComboBoxCellEditor) cellEditors[2] ).setItems( getDataSetColumns( selectedParameter,
				true ) );
		( (ComboBoxCellEditor) cellEditors[3] ).setItems( getDataSetColumns( selectedParameter,
				false ) );
	}