//initializd Environment

	EngineConfig    config = new EngineConfig();
	IPlatformContext context; 
	config.setPlatformContext(context);  //context use null

	Platform.startup(config); 
        IReportEngineFactory factory = (IReportEngineFactory)     
Platform.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
        IReportEngine engine = factory.createReportEngine(config);

	//generate report
	
	// create report runnable
	String reportName = "/report/report.rptdesign";

        IReportRunnable runnable = null;
	InputStream is = null;
    	try {
            is = new FileInputStream(new File(reportName));
	    runnable = engine.openReportDesign(is);

	} catch (EngineException e) {  ...
	} finally {
		    ...  //close is input stream 
	}
	
	//create task
	IRunAndRenderTask task = engine.createRunAndRenderTask(runnable);

	task.setAppContext(new HashMap<String, HTMLRenderContext>());

	Map<String, String> parameters = ....;  //actual value from input argument representing parameters pass to birt report design file
	
	task.setParameterValues(parameters);
	
        ByteArrayOutputStream os = new ByteArrayOutputStream();
	RenderOption renderOption = new HTMLRenderOption();
	renderOption.setOutputFormat(RenderOption.OUTPUT_FORMAT_HTML);
	config.setEmitterConfiguration( HTMLRenderOption.OUTPUT_FORMAT_HTML, renderOption);
	task.setRenderOption(outputOption);
		
    //run task 
        try { 
           task.run();
	} catch(EngineException e) { ...
	} finally {
	    task.close();
	}
	
	return os.toByteArray();