Question

I have a main report with a main query and a Table (with subdataset) inside of it, which has its own Query.

I know how to specify the Query for the main report, but I don’t know how the to specify Query for the subdatset in my Java code of creation reports.

Can anyone help, please ?

My code:

public static java.sql.Connection cx = Connexion.SetConOn();

public static void Create report(String Query, String model, String title, String art) {
    try {
        JRDesignQuery jrd = new JRDesignQuery();
        JasperDesign design = JRXmlLoader.load(model);
        jrd.setText(Query);
        design.setQuery(jrd);
        Map map = new HashMap();
        JasperReport etat = JasperCompileManager.compileReport(design);
        JasperPrint print = JasperFillManager.fillReport(etat, map, cx);
        File f = new File("C:\\" + fdg);
        f.mkdir();
        JasperExportManager.exportReportToPdfFile(print, f.getPath() + "\\" + title + ".pdf");
        JasperViewer jv = new JasperViewer(print, false, Locale.FRENCH);

        try {
            java.awt.image.BufferedImage bi = javax.imageio.ImageIO.read(jv.getClass().getResource("/cycloplan/Images/Burn-icon1.png"));
            javax.swing.ImageIcon myImg = new javax.swing.ImageIcon(bi);
            jv.setIconImage(myImg.getImage());

        } catch (java.io.IOException ex) {
            ex.printStackTrace();
        }

        jv.setTitle(title);
        jv.setAlwaysOnTop(true);
        jv.setVisible(true);
    } catch (JRException ex) {
        ex.printStackTrace();
    }
}

Answer 1

The JasperDesign class has a few different ways to access subdatasets; take a look at the javadoc [link]. I think the following code should work to set the subdataset query, where subQueryString is the query you want to use and datasetName is the name given to the subdataset element in the JRXML.

JRDesignQuery subQuery = new JRDesignQuery();
subQuery.setText(subQueryString);
Map<String, JRDataset> datasetMap = design.getDatasetMap();
JRDesignDataset subDataset = (JRDesignDataset) datasetMap.get(datasetName);
subDataset.setQuery(subQuery);

(* I haven’t actually tested this code. YMMV)