+ } 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;