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/api/CubeQueryExecutorHelper.java
}
	
	/**
	 * @param isBreakHierarchy the isBreakHierarchy to set
	 */
	public void setBreakHierarchy( boolean isBreakHierarchy )
	{
		this.isBreakHierarchy = isBreakHierarchy;
	}
	
	/**
	 * 
	 * @throws DataException
	 */
	private void validateComputedMeasureNames() throws DataException
	{
		Set existNames = new HashSet(Arrays.asList( cube.getMeasureNames( ) ));
		MeasureInfo[] mis = computedMeasureHelper.getAllComputedMeasureInfos( );
		for (int i=0; i<mis.length; i++) 
		{
			String name = mis[i].getMeasureName( );
			if (existNames.contains( name ))
			{
				throw new DataException(ResourceConstants.DUPLICATE_MEASURE_NAME, name);
			}
			existNames.add( name );
		}
		
	}
}