Bug 187201 DTE should give out 4 API for CrossTab sort and filter
DTE should give out 4 API for CrossTab sort and filter. 2 apis are used by giving out the available binding for CrossTab sort and filter. The third is api used by giving out the member value viewer is available. The fourth api is used by giving out the available value list about the memeber value.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/filter/DimensionFilterEvalHelper.java
* @see org.eclipse.birt.data.engine.olap.util.filter.IJsFilter#isAggregationFilter()
	 */
	public boolean isAggregationFilter( )
	{
		return this.dimName == null;
	}
	
	/**
	 * 
	 * @return
	 * @throws DataException 
	 */
	private IDimensionDefinition getTargetDimension( ) throws DataException
	{
		if ( isAggregationFilter( ) )
		{
			ILevelDefinition targetLevel = cubeFilter.getTargetLevel( );
			if ( targetLevel == null )
			{
				throw new DataException( "Referenced level:"
						+ targetLevel.getName( ) + " does not exist." );
			}
			IDimensionDefinition dimDefn = targetLevel.getHierarchy( )
					.getDimension( );
			if ( dimDefn == null )
			{
				throw new DataException( "Referenced dimension:"
						+ this.dimName + " does not exist." );
			}
			return dimDefn;