Bug 417305 A sample chart has no data
chart/org.eclipse.birt.chart.examples/src/org/eclipse/birt/chart/examples/view/models/WorkingWithBIRTDataEngine.java
grouping.setGroupingUnit( GroupingUnitType.STRING_LITERAL );
		grouping.setGroupingInterval( 0 );
		grouping.setAggregateExpression( "Count" ); 
		xAxisPrimary.getSeriesDefinitions( ).add( sdX );
		sdX.getSeries( ).add( seCategory );
		
		BarSeries bs1 = (BarSeries) BarSeriesImpl.create( );
		bs1.getDataDefinition( ).add( QueryImpl.create( expressions[1] ) );
		bs1.getLabel( ).setVisible( true );
		bs1.setLabelPosition( Position.INSIDE_LITERAL );
		SeriesDefinition sdY = SeriesDefinitionImpl.create( );
		yAxisPrimary.getSeriesDefinitions( ).add( sdY );
		sdY.getSeries( ).add( bs1 );
		return cwaBar;
	}
	/**
	 * Binds data into chart model.
	 * 
	 * @param cwaBar
	 * @return
	 * @throws ChartException
	 */
	private ChartWithAxes bindData( ChartWithAxes cwaBar,
			String[] expressions ) throws ChartException
	{
		RunTimeContext context = new RunTimeContext( );
		context.setULocale( ULocale.getDefault( ) );
		IDataRowExpressionEvaluator evaluator;
		try
		{