Bug 182895 Support sort on Level attribute.
Currently in OLAP engine we only support sort on level key value. We should go ahead to support sort on level attribute value.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/impl/aggregation/sort/AggregationSortHelper.java
public Object[] getFieldValues( )
	{
		return aggrValues;
	}
	
	public static IStructureCreator getCreator()
	{
		return new AggrValueOnlyResultRowCreator( );
	}
}
/**
 * 
 * @author Administrator
 *
 */
class AggrValueOnlyResultRowCreator implements IStructureCreator
{
	public IStructure createInstance( Object[] fields )
	{
		return new AggrValueOnlyResultRow( fields );
	}
}
/**
 * The comparator implementation which is used to compare two AggrResultRows 
 * according to given key.
 * 
 *
 */
class AggrResultRowComparator implements Comparator
{