+import org.argeo.api.gcr.CrName;
+
+public abstract class AbstractContent extends AbstractMap<QName, Object> implements Content {
+
+ /*
+ * ATTRIBUTES OPERATIONS
+ */
+ protected abstract Iterable<QName> keys();
+
+ protected abstract void removeAttr(QName key);
+
+ @Override
+ public Set<Entry<QName, Object>> entrySet() {
+ Set<Entry<QName, Object>> result = new AttrSet();
+ return result;
+ }
+
+ @Override
+ public Class<?> getType(QName key) {
+ return String.class;
+ }
+
+ @Override
+ public boolean isMultiple(QName key) {
+ return false;
+ }
+
+ @Override
+ public <A> Optional<List<A>> getMultiple(QName key, Class<A> clss) {
+ Object value = get(key);
+ if (value == null)
+ return null;
+ if (value instanceof List) {
+ try {
+ List<A> res = (List<A>) value;
+ return Optional.of(res);
+ } catch (ClassCastException e) {
+ List<A> res = new ArrayList<>();
+ List<?> lst = (List<?>) value;
+ try {
+ for (Object o : lst) {
+ A item = (A) o;
+ res.add(item);
+ }
+ return Optional.of(res);
+ } catch (ClassCastException e1) {
+ return Optional.empty();
+ }
+ }
+ } else {// singleton
+ try {
+ A res = (A) value;
+ return Optional.of(Collections.singletonList(res));
+ } catch (ClassCastException e) {
+ return Optional.empty();
+ }
+ }
+ }
+
+ /*
+ * CONTENT OPERATIONS
+ */
+
+ @Override
+ public String getPath() {
+ List<Content> ancestors = new ArrayList<>();
+ collectAncestors(ancestors, this);
+ StringBuilder path = new StringBuilder();
+ for (Content c : ancestors) {
+ QName name = c.getName();
+ // FIXME
+ if (!CrName.ROOT.get().equals(name))
+ path.append('/').append(name);
+ }
+ return path.toString();
+ }