@SuppressWarnings("unchecked")
public <T> T retrieve(String dbID, String key, Class<T> type) {
PersistentEntry entry = retrieveEntry(dbID, key);
if (entry != null) {
return (T) entry.getData();
}
return null;
}
public <T> void persist(String dbID, String key, T data) {
// Update entry if entry has already existed
// otherwise create a new entry
PersistentEntry entry = retrieveEntry(dbID, key);
if (entry == null) {
entry = new PersistentEntry(key);
}
entry.setData(data);
// Store to object database
getObjectContainer(dbID).store(entry);
getObjectContainer(dbID).commit();
// Get
Query query = getObjectContainer(dbID).query();
query.constrain(PersistentEntry.class);
query.descend("key").constrain(key);
ObjectSet<PersistentEntry> result = query.execute();
if (result.size() > 0) {
System.out.println(result.get(0));
}
}