Bug 214577 Support cube filter in chart
For chart consuming cube, need to support filtering on categories or series, possibly on values if time allows. The UI is similar to the filter dialog for cross tab, but there should be no measure or dimension concepts in chart's dialog.
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemUtil.java
list.add( i.next( ) );
			}
			i = itemHandle.columnBindingsIterator( );
			while ( i.hasNext( ) )
			{
				list.add( i.next( ) );
			}
			return list.iterator( );
		}
		return null;
	}
	/**
	 * Convert group unit type from Chart's to DtE's.
	 * 
	 * @param dataType
	 * @param groupUnitType
	 * @param intervalRange
	 * @since BIRT 2.3
	 */
	public static int convertToDtEGroupUnit( DataType dataType,
			GroupingUnitType groupUnitType, double intervalRange )
	{
		if ( dataType == DataType.NUMERIC_LITERAL )
		{
			if ( intervalRange == 0 )
			{
				return IGroupDefinition.NO_INTERVAL;
			}
			return IGroupDefinition.NUMERIC_INTERVAL;
		}