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
result.add( new Boolean( sk.getAggrSortDirection( )[j] ) );
			}
			result.add( new Boolean( sk.getLevelSortDirection( ) ) );
		}
		boolean[] objs = new boolean[result.size( )];
		for ( int i = 0; i < objs.length; i++ )
		{
			objs[i] = ( (Boolean) result.get( i ) ).booleanValue( );
		}
		return objs;
	}
}
/**
 * A navigator class for an IDiskArray instance.
 *
 */
class AggregationResultRowNavigator
{
	private int index;
	private IDiskArray array;
	/**
	 * 
	 * @param array
	 */
	AggregationResultRowNavigator( IDiskArray array )
	{
		this.index = 0;
		this.array = array;
	}
	/**