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/impl/QueryExecutor.java
resolveParameterBindings(
					getDataSet().getInputParamBindings(),
					paramHints, bindingResolved, cx );
		}
		finally
		{
			if ( cx != null )
				Context.exit( );
		}
		
		return Arrays.asList( paramHints );
	}
	/**
	 * Resolve a list of parameter bindings and update the hints
	 * @param cx JS context to evaluate binding. If null, binding does not need to be evaluated
	 */
	private void resolveParameterBindings( Collection bindings, 
			ParameterHint[] paramHints, boolean[] bindingResolved, Context cx )
		throws DataException
	{
		if ( bindings == null )
			return;
		
		Iterator it = bindings.iterator();
		while ( it.hasNext() )
		{
			resolveParameterBinding( (IInputParameterBinding) it.next(),
					paramHints, bindingResolved, cx );
		}
	}