Bug 132515 Expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error
Description: Add an expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error.The nesting "Toltal" seem not to be work. Step to reproduce: 1.new a datasource and dataset 2.drag the dataset to layout veiw for a table 3.set a group on the table 4.Insert a data into the group header with the expression e.g. "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" Actual result: An error was thrown out Expected result: It should work correctly in order to support some requirments
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/group/GroupInstanceFilter.java
{
			
			List filters = this.populator.getQuery( ).getGrouping( )[i - 1].getFilters( );
			if ( filters == null || filters.size( ) == 0 )
				continue;
			
			this.populator.getResultIterator( ).first( 0 );
			if ( FilterUtil.hasMutipassFilters( filters ) )
			{
				populateGroupBoundaryInfoFilterValues( cx,
						groupBoundaryInfos,
						i,
						filters );
			}
			else
			{
				populateGroupBoundaryInfoFilters( cx,
						groupBoundaryInfos[i - 1],
						filters,
						i,
						true );
			}
			groupBoundaryInfos = this.groupProcessor.getGroupCalculationUtil( )
					.filterGroupBoundaryInfos( groupBoundaryInfos );
			for ( int j = 0; j < filters.size( ); j++ )
			{
				IFilterDefinition fd = (IFilterDefinition) filters.get( j );
				if ( FilterUtil.isFilterNeedMultiPass( fd ) )
				{
					fd.getExpression( ).setHandle( null );