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( ILogger.INFORMATION,Messages.getString( "ChartReportItemPresentationImpl.error.NoData" ) ) ;
			return null;
		}
		logger.log( ILogger.INFORMATION,
				Messages.getString( "ChartReportItemPresentationImpl.log.onRowSetsStart" ) ); 
		
		if ( handle == null )
		{
			return null;
		}
		try
		{
			String javaHandlerClass = handle.getEventHandlerClass( );
			if ( javaHandlerClass != null && javaHandlerClass.length( ) > 0 )
			{
				
				cm.setScript( javaHandlerClass );
			}
			IRowSet rowSet = irsa[0];
			if ( rowSet == null || rowSet.isEmpty( ) )
			{
				
				return null;
			}
			rtc.setScriptClassLoader( new BIRTScriptClassLoader( appClassLoader ) );
			
			
			
			ScriptHandler sh = rtc.getScriptHandler( );
			BIRTExternalContext externalContext = new BIRTExternalContext( context );