Bug 417305 A sample chart has no data
chart/org.eclipse.birt.chart.examples/src/org/eclipse/birt/chart/examples/view/models/WorkingWithBIRTDataEngine.java
expressions[0] = ExpressionUtil.createRowExpression( FlatFileDataSource.COLUMN_COUNTRY );
		expressions[1] = ExpressionUtil.createRowExpression( FlatFileDataSource.COLUMN_CUSTOMERNUMBER );
		ChartWithAxes cwaBar = wwbde.createChartModel( expressions );
		cwaBar = wwbde.bindData( cwaBar, expressions );
		return cwaBar;
	}
	/**
	 * Create chart model.
	 * 
	 * @param expressions
	 *            expressions are used to set category series and value series.
	 * @return
	 */
	private ChartWithAxes createChartModel( String[] expressions )
	{
		ChartWithAxes cwaBar = ChartWithAxesImpl.create( );
		cwaBar.setType( "Bar Chart" ); 
		cwaBar.setSubType( "Side-by-side" ); 
		
		cwaBar.getBlock( ).setBackground( ColorDefinitionImpl.WHITE( ) );
		cwaBar.getBlock( ).getOutline( ).setVisible( true );
		Plot p = cwaBar.getPlot( );
		p.getClientArea( ).setBackground( ColorDefinitionImpl.create( 255,
				255,
				225 ) );
		
		cwaBar.getTitle( )
				.getLabel( )
				.getCaption( )
				.setValue( "Working with BIRT Data Engine" );