+ @SuppressWarnings("unchecked")
+ public <A> CompletableFuture<A> write(Class<A> clss) {
+ if (String.class.isAssignableFrom(clss)) {
+ CompletableFuture<String> res = new CompletableFuture<>();
+ res.thenAccept((s) -> {
+ getSession().notifyModification(this);
+ element.setTextContent(s);
+ });
+ return (CompletableFuture<A>) res;
+ } else if (Source.class.isAssignableFrom(clss)) {
+ CompletableFuture<Source> res = new CompletableFuture<>();
+ res.thenAccept((source) -> {
+ try {
+ Transformer transformer = provider.getTransformerFactory().newTransformer();
+ DocumentFragment documentFragment = element.getOwnerDocument().createDocumentFragment();
+ DOMResult result = new DOMResult(documentFragment);
+ transformer.transform(source, result);
+ // Node parentNode = element.getParentNode();
+ Element resultElement = (Element) documentFragment.getFirstChild();
+ QName resultName = toQName(resultElement);
+ if (!resultName.equals(getName()))
+ throw new IllegalArgumentException(resultName + "+ is not compatible with " + getName());
+
+ // attributes
+ NamedNodeMap attrs = resultElement.getAttributes();
+ for (int i = 0; i < attrs.getLength(); i++) {
+ Attr attr2 = (Attr) element.getOwnerDocument().importNode(attrs.item(i), true);
+ element.getAttributes().setNamedItem(attr2);
+ }
+
+ // Move all the children
+ while (element.hasChildNodes()) {
+ element.removeChild(element.getFirstChild());
+ }
+ while (resultElement.hasChildNodes()) {
+ element.appendChild(resultElement.getFirstChild());
+ }
+// parentNode.replaceChild(resultNode, element);
+// element = (Element)resultNode;
+
+ } catch (DOMException | TransformerException e) {
+ throw new RuntimeException("Cannot write to element", e);
+ }
+ });
+ return (CompletableFuture<A>) res;
+ }
+ return super.write(clss);
+ }
+
+ /*
+ * TYPING
+ */
+ @Override
+ public List<QName> getContentClasses() {
+ List<QName> res = new ArrayList<>();
+ res.add(getName());
+ return res;
+ }
+
+ /*
+ * MOUNT MANAGEMENT
+ */
+ @Override
+ public ProvidedContent getMountPoint(String relativePath) {
+ // FIXME use qualified names
+ Element childElement = (Element) element.getElementsByTagName(relativePath).item(0);
+ // TODO check that it is a mount
+ return new DomContent(this, childElement);
+ }
+
+ @Override