public void saveReport() //throws BirtException, IOException, NumberFormatException, PortalException, SystemException
	{	
		try{
		designConfig = new DesignConfig();
		designConfig.setBIRTHome(getText("runtime-path"));							
	    Platform.startup(designConfig);
	    IDesignEngineFactory designFactory = (IDesignEngineFactory) Platform.createFactoryObject(IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY);
		//create an instance of the design engine. 
	    IDesignEngine designEngine = designFactory.createDesignEngine(designConfig);
	    SessionHandle session = designEngine.newSessionHandle(ULocale.ENGLISH);
		//Then, create a new report design.
	    ReportDesignHandle design = session.createDesign();
		//Next, get the "element factory" that creates new elements within your design: 
		ElementFactory factory = design.getElementFactory( );
		//Next, we add a page master that determines how the report will appear when printed: 
		DesignElementHandle element = factory.newSimpleMasterPage( "Page Master" );
		design.getMasterPages( ).add( element );
		//This design will contain a grid that contains an image and a label. 
		//Let's first create the datasource and its dataset we need to derive data from db . 
		DataSourceHandle odaDS = factory.newOdaDataSource("ODADataSource","org.eclipse.birt.report.data.oda.jdbc");
		odaDS.setStringProperty("odaDriverClass", getText("db-driverClass"));
		odaDS.setStringProperty("odaURL", getText("db-url")); // we should change it		
		odaDS.setStringProperty("odaUser", getText("db-username"));
		odaDS.setStringProperty("odaPassword", getText("db-password"));
		design.getDataSources().add(odaDS);			
		//DataSet
		OdaDataSetHandle dataSetHandle = factory.newOdaDataSet("Data Set","org.eclipse.birt.report.data.oda.jdbc.JdbcSelectDataSet");
		dataSetHandle.setDataSource("ODADataSource");
		String queryText = "select ";
		Set<String> tables = new HashSet<String>();
		//we complete queryText later in the next for loop
		//next we create a table and add it to the report's body slot. 	
		
		REPORTLocalServiceUtil.getREPORT(Long.parseLong(getSelectedReportId()));
		DynamicQuery dynamicQuery = DynamicQueryFactoryUtil.forClass(REPORT_FIELD.class);
		dynamicQuery.add(PropertyFactoryUtil.forName("BAHMAN_REPORT_FIELD_REPORT_id").eq(Long.parseLong(getSelectedReportId())));
		List<REPORT_FIELD> reportFields = (List<REPORT_FIELD>)REPORT_FIELDLocalServiceUtil.dynamicQuery(dynamicQuery);		
		
		TableHandle table = factory.newTableItem(null, reportFields.size(), 1,1,1);
		design.getBody().add(table);
		table.setWidth("100%");		
		table.setDataSet(dataSetHandle);
		//Next, we should create Labels and Data items and add them to details slot of table. 		    			
		
		RowHandle tableHeader = (RowHandle) table.getHeader().get(0);
		RowHandle tableDetail = (RowHandle) table.getDetail().get(0);
		
		for( int i=0; i < reportFields.size(); i++)
		{
			//add a label to column number i in the header of table
			REPORT_FIELD field = reportFields.get(i);
			LabelHandle label = factory.newLabel(field.getBAHMAN_REPORT_FIELD_form_field_name());	
			label.setText(field.getBAHMAN_REPORT_FIELD_title());
			CellHandle cell = (CellHandle) tableHeader.getCells().get(i);
			cell.getContent().add(label);
			
			//add a Data item to column number i in the detail of table
			DataItemHandle dataitem = factory.newDataItem(field.getBAHMAN_REPORT_FIELD_form_field_name());
			dataitem.setResultSetColumn(field.getBAHMAN_REPORT_FIELD_form_field_name());
			CellHandle cellOfDetail = (CellHandle) tableDetail.getCells().get(i);
			cellOfDetail.getContent().add(dataitem);
			
			queryText += field.getBAHMAN_REPORT_FIELD_form_field_name();
			if(i!=reportFields.size()-1) queryText+=",";
			
			tables.add(field.getBAHMAN_REPORT_FIELD_form_name());
		}							
		
		queryText += " from ";
		Iterator iter = tables.iterator();
		while(iter.hasNext())
		{
			queryText += iter.next() + ",";
		}
		queryText = (String) queryText.subSequence(0, queryText.length()-1); // removes last ,
		
		dataSetHandle.setQueryText(queryText); 			
		design.getDataSets().add(dataSetHandle); // we should build query text 			

	    //Finally, save and close the report design.
	    //design.saveAs(getText("save-path") + "/sample.rptdesign");
		design.saveAs("D:/Birt/Report/sample.rptdesign");
	    design.close();
	    //You can now open the design within BIRT and preview it. 	
		}catch(Exception e)
		{
			e.printStackTrace();
		}
	}