Bug 202115 Can not filter the measure value when only one dimension[1102]
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/filter/BaseDimensionFilterEvalHelper.java
* @see org.eclipse.birt.data.engine.olap.util.filter.IJSFilterHelper#getAggrLevels()
	 */
	public DimLevel[] getAggrLevels( )
	{
		return this.aggrLevels;
	}
	/***
	 * 
	 * @return
	 * @throws DataException
	 */
	protected List getTargetDimensionLevelNames( ) throws DataException
	{
		IDimensionDefinition dimDefn = getTargetDimension( );
		if ( dimDefn == null )
			throw new DataException( "Referenced dimension definition:"+this.dimName+" does not exist.");
		List result = new ArrayList();
		List levels = ((IHierarchyDefinition)dimDefn.getHierarchy( ).get( 0 )).getLevels( );
		for( int j = 0; j < levels.size(); j++ )
		{
			ILevelDefinition level = (ILevelDefinition)levels.get( j );
			result.add( level.getName( ) );
		}
		return result;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.olap.util.filter.IJSFilterHelper#getDimensionName()
	 */
	public String getDimensionName( )
	{