Category support

[dkirrane]

Setting categories doesn't seem to work

            EmailMessage msg;
            msg = new EmailMessage(exchangeService);
            msg.setCategories(new StringList("Blue Category"));

Also, there doesn't seem to be a way to create a new category

[gaby44541]

Unfortunately, EWS Java API doesn't manage properly categories. But we can manage categories ourself : indeed, we can get the xml containing all categories. By coding methods, we can read this xml, update nodes, and rewrite to Exchange.

To get the XML :

           UserConfiguration config = UserConfiguration.bind(ExchangeManager.getService(), "CategoryList", WellKnownFolderName.Calendar,
                                       UserConfigurationProperties.XmlData);
            String s = new String(config.getXmlData(),"UTF-8");
            System.err.println("Categories (XML) : "+s);

To read the XML and put each categories in an ArrayList of Category (you have to create the class Category)

  private static void readXML(byte[] documentoXml){
        try {
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            Document doc = dBuilder.parse(new ByteArrayInputStream(documentoXml));
            doc.getDocumentElement().normalize();
            CategoryManager.categories = new ArrayList<Category>();

            NodeList nList = doc.getElementsByTagName("category");
            for (int temp = 0; temp < nList.getLength(); temp++) {
                Node nNode = nList.item(temp);
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;

                    boolean renameOnFirstUse = "1".equals(eElement.getAttribute("renameOnFirstUse")) ? true : false;
                    String name = eElement.getAttribute("name");
                    int color = Integer.parseInt(eElement.getAttribute("color"));
                    int keyboardShortcut = Integer.parseInt(eElement.getAttribute("keyboardShortcut"));
                    String guid = eElement.getAttribute("guid");
                    categories.add(new Category(renameOnFirstUse,name,color,keyboardShortcut,guid,isIXBat));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

To write the ArrayList in XML

    private static byte[] updateXML(byte[] documentoXml){
        try {
            DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
            Document doc = docBuilder.parse(new ByteArrayInputStream(documentoXml));

            // Get the root element
            //Node categories = doc.getFirstChild();

            NodeList nList = doc.getElementsByTagName("category");
            for (int temp = 0; temp < nList.getLength(); temp++) {    
                Node category = doc.getElementsByTagName("category").item(temp);

                Category cat = findCategory(((Element)category).getAttribute("guid"));
                System.err.println("> " + cat);

                // maj category attribute
                NamedNodeMap attr = category.getAttributes();

                Node nodeAttrName = attr.getNamedItem("name");
                nodeAttrName.setTextContent(cat.getNom());

                Node nodeAttrColor = attr.getNamedItem("color");
                nodeAttrColor.setTextContent(cat.getCodeCouleur()+"");                    

            }

            // write the content into xml file
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(doc);

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            StreamResult result = new StreamResult(bos);
            transformer.transform(source, result);

            return bos.toByteArray();

        } catch (ParserConfigurationException pce) {
            pce.printStackTrace();
        } catch (TransformerException tfe) {
            tfe.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (SAXException sae) {
            sae.printStackTrace();
        }
        return null;
    }

To send the XML to Exchange :

public static void updateCategoriesToExchange(){
    try {
        UserConfiguration config =
            UserConfiguration.bind(ExchangeManager.getService(), "CategoryList", WellKnownFolderName.Calendar,
                                   UserConfigurationProperties.XmlData);
        byte[] nvXml = CategoryManager.updateXML(config.getXmlData());

        System.err.println(new String(nvXml));
        config.setXmlData(nvXml);
        config.update();
    } catch (Exception e) {
        e.printStackTrace();
    }

}

[markporter]

In case anyone else is having issues setting categories on an Item:

StringList needs to be either an iterable of Strings or you need manually add categories:

StringList newCategories = new StringList();
newCategories.add("Alert");
newCategories.add("TempSensor");
// "item" is a item from a a previus FindResults, or Item.bind()
// you need to update this or nothing interesting will happen
item.setCategories(newCategories)
item.update(ConflictResolutionMode.AlwaysOverwrite)

[dhavalgada11]

@gaby44541 Can you share the structure for Category.java as well. EWS API doesn't have implementation for it by default.