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
groupedFilters,
						currentGroupArray, passedGroups );
				passedGroups+=currentGroupArray.size( );
			}
		}
		else
		{
			makeAGroupFilteringMultiPass( cx,
					i,
					groupedFilters,
					groupBoundaryInfos[i - 1], 0 );
		}
	}
	/**
	 * Dealing with filters that needs multi-pass.
	 * 
	 * @param cx
	 * @param groupLevel
	 * @param groupedFilters
	 * @param j
	 * @param currentGroupArray
	 * @param startingGroupInstanceIndex
	 * @throws DataException
	 */
	private void makeAGroupFilteringMultiPass( Context cx, int groupLevel,
			List filters, List currentGroupArray, int startingGroupInstanceIndex ) throws DataException
	{
		advanceResultIteratorCursor( groupLevel, startingGroupInstanceIndex );
		
		filterPass.setPassLevel( FilterPassController.FIRST_PASS );