Bug 193467 URL hyperlink can't work in chart viewer
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemPresentationImpl.java
logger.log( e );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#getOutputType()
	 */
	public int getOutputType( )
	{
		if ( "SVG".equals( sExtension ) ) 
		{
			return OUTPUT_AS_IMAGE;
		}
		else
		{
			return OUTPUT_AS_IMAGE_WITH_MAP;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#getImageMIMEType()
	 */
	public String getImageMIMEType( )
	{
		if ( idr instanceof IImageMapEmitter )
		{
			return ( (IImageMapEmitter) idr ).getMimeType( );
		}