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.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
*      java.lang.String[], int, boolean)
	 */
	public IDataRowExpressionEvaluator prepareRowExpressionEvaluator( Chart cm,
			List columnExpression, int rowCount, boolean isStringType )
			throws ChartException
	{
		
		
		ClassLoader oldContextLoader = Thread.currentThread( )
				.getContextClassLoader( );
		ClassLoader parentLoader = oldContextLoader;
		if ( parentLoader == null )
			parentLoader = this.getClass( ).getClassLoader( );
		ClassLoader newContextLoader = getCustomScriptClassLoader( parentLoader );
		Thread.currentThread( ).setContextClassLoader( newContextLoader );
		try
		{
			DataRequestSession session = prepareDataRequestSession( getMaxRow( ) );
			BaseQueryHelper cbqh = new BaseQueryHelper( itemHandle, cm );
			QueryDefinition queryDefn = (QueryDefinition) cbqh.createBaseQuery( columnExpression );
			
			
			
			
			resetParametersForDataPreview( getDataSetFromHandle( ), queryDefn );
			IQueryResults actualResultSet = session.executeQuery( queryDefn,
					null,
					itemHandle.getPropertyHandle( ExtendedItemHandle.FILTER_PROP )
							.iterator( ),
					ChartReportItemUtil.getColumnDataBindings( itemHandle ) );