public static boolean isEmpty(@Nullable Parent element) {
if (element == null) {
return true;
} else if (element instanceof Element) {
return JDOMUtil.isEmpty((Element) element);
} else {
Document document = (Document) element;
return !document.hasRootElement() || JDOMUtil.isEmpty(document.getRootElement());
}
}
public void writeExternal(@NotNull Element element) {
if (myExternalizers.isEmpty()) {
return;
}
List<AbstractProperty> properties = new ArrayList<>(myExternalizers.keySet());
Collections.sort(properties, AbstractProperty.NAME_COMPARATOR);
for (AbstractProperty property : properties) {
Externalizer externalizer = myExternalizers.get(property);
if (externalizer == null) {
continue;
}
Object propValue = property.get(this);
if (!Comparing.equal(propValue, property.getDefault(this))) {
Element child = new Element(property.getName());
externalizer.writeValue(child, propValue);
if (!JDOMUtil.isEmpty(child)) {
element.addContent(child);
}
}
}
}