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
return null;
		}
		public String getColumnText( Object element, int columnIndex )
		{
			String value = null;
			ScalarParameterHandle paramHandle = null;
			if ( element instanceof ScalarParameterHandle )
			{
				paramHandle = (ScalarParameterHandle) element;
			}
			if ( paramHandle == newParameter )
			{
				if ( columnIndex == 0 )
				{
					String paramName;
					paramName = paramHandle.getName( );
					if ( !givenName )
					{
						value = LABEL_CREATE_NEW_PARAMETER;
					}
					else
					{
						value = getDummyText( paramHandle ) + paramName;
					}
				}
				else if ( columnIndex == 1 )
				{
					if ( !isSingle( ) || paramHandle == getFirstParameter( ) )
					{
						value = LABEL_SELECT_DATA_SET;