Bug 180190 Some unnecessary error log is shown in charting
When a chart in a report has no data, or there is no SWT interactivity notifier hooked to the engine, an warning or error are logged. Those are normal conditions of execution and should only log with a INFO level.
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemPresentationImpl.java
}
		catch ( ChartException e )
		{
			logger.log( e );
		}
	}
	/**
	 * check if the format is supported by the browser and device renderer.
	 */
	private boolean isOutputRendererSupported( String format )
	{
		if ( format != null )
		{
			if ( sSupportedFormats != null
					&& ( sSupportedFormats.indexOf( format ) != -1 ) )
			{
				return registeredDevices.contains( format );
			}
		}
		return false;
	}
	private String getFirstSupportedFormat( String formats )
	{
		if ( formats != null && formats.length( ) > 0 )
		{
			int idx = formats.indexOf( ';' );
			if ( idx == -1 )
			{
				if ( isOutputRendererSupported( formats ) )
				{