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/expression/ExpressionProcessor.java
{
		if ( this.tempRefactorCmpList != null )
		{
			for ( int i = 0; i < tempRefactorCmpList.size( ); i++ )
			{
				int index = ( (Integer) tempRefactorCmpList.get( i ) ).intValue( );
				helper.addAvailableCmpColumn( this.computedColumnState.getName( index ) );
				this.computedColumnState.setValueAvailable( index );
			}
		}
	}
	
	/**
	 * Return the index of group according to the given group text.
	 * @param groupText
	 * @return The index of group 
	 */
	private int getCurrentGroupLevel( String groupText, int start )
	{
		assert groupText != null;
		assert query != null;
		GroupSpec[] groups = query.getGrouping( );
		for ( int i = start; i < groups.length; i++ )
		{
			GroupSpec group = groups[i];
			if ( groupText.equals( group.getName( ) )
					|| groupText.equals( group.getKeyColumn( ) ) )
			{
				return i + 1; 
			}