@Override public void writeExternal(Element rootElement) throws WriteExternalException { LOG.assertTrue(!isDisposed(), "Already disposed!"); Element element = new Element(ELEMENT); if (myName != null) { element.setAttribute(LIBRARY_NAME_ATTR, myName); } if (myKind != null) { element.setAttribute(LIBRARY_TYPE_ATTR, myKind.getKindId()); final Object state = myProperties.getState(); if (state != null) { final Element propertiesElement = XmlSerializer.serialize(state, SERIALIZATION_FILTERS); if (propertiesElement != null && (!propertiesElement.getContent().isEmpty() || !propertiesElement.getAttributes().isEmpty())) { element.addContent(propertiesElement.setName(PROPERTIES_ELEMENT)); } } } ArrayList<OrderRootType> storableRootTypes = new ArrayList<OrderRootType>(); storableRootTypes.addAll(Arrays.asList(OrderRootType.getAllTypes())); if (myKind != null) { storableRootTypes.addAll(Arrays.asList(myKind.getAdditionalRootTypes())); } for (OrderRootType rootType : sortRootTypes(storableRootTypes)) { final VirtualFilePointerContainer roots = myRoots.get(rootType); if (roots.size() == 0 && rootType.skipWriteIfEmpty()) continue; // compatibility iml/ipr final Element rootTypeElement = new Element(rootType.name()); roots.writeExternal(rootTypeElement, ROOT_PATH_ELEMENT); element.addContent(rootTypeElement); } myJarDirectories.writeExternal(element); rootElement.addContent(element); }