String path = "/tmp/BIRTrrdemo/";
		
// Init engine...
EngineConfig config = new EngineConfig();
Platform.startup( config );

ReportEngineFactory ref = new ReportEngineFactory();
IReportEngine engine = ref.createReportEngine( config );

// Open design
IReportRunnable design = engine.openReportDesign( path + "test.rptdesign" );
		
HashMap values = getDefaultParams( design, engine );

// Run task to create document...
IRunTask task = engine.createRunTask( design );
task.setParameterValues( values );

FileArchiveWriter faw = null;
faw = new FileArchiveWriter( path + "myDocumentFile.rptdocument" );

// Creates the file representation of the IReportDocument
task.run( faw );

// Could stop here and store the IReportDocument for rendering later...
	
// Now render...
System.out.println( "Read & render..." );
Map< ?, ? > nowt = new HashMap< Object, Object >();
FileArchiveReader far = null;
far = new FileArchiveReader( path + "myDocumentFile.rptdocument" );

// We got the IReportDocument now...
IReportDocument doc = engine.openReportDocument( null, far, nowt );

//... render it		
HTMLRenderOption options = new HTMLRenderOption();
options.setOutputFileName( path + "myDocumentFile.html" );
	
IRenderTask render = engine.createRenderTask( doc );
render.setRenderOption( options );
render.render();

LinkedList<IReportDocument> listDocument = new LinkedList<>();
listDocument.add(aGeneratedDocument);