Get multiple properties from blueprints Vertex - titan

Question

My problem is that com.tinkerpop.blueprints.Vertex class does not support multiple properties (Cardinality.SET or Cardinality.LIST). To get this option TitanVertex class that extends from Vertex must be used.
I want use TransactionRetryHelper to make titan DB transaction.
User user = new TransactionRetryHelper.Builder<User>(tw.getConnection())
.perform(new TransactionWork<User>() {
#Override
public User execute(final TransactionalGraph tg) throws Exception {
return userDao.getUser(tg, userId);
}
}).build().oneAndDone();
But in this case TransactionWork interface pass TransactionalGraph to execute method and not TitanGraph that extends TransactionalGraph. The TitanVertex object I can get only from TitanGraph but not from TransactionalGraph.
What is the alternative to TransactionRetryHelper that allows to use the TitanGraph?

Answer 1

After more detailed research of my own problem I found the solution. In my case tw.getConnection returns TitanGraph that extends TransactionalGraph and it is the reason that I can cast (TitanGraph)TransactionalGraph tg and get TitanVertex from it. For example:
User user = new TransactionRetryHelper.Builder<User>(tw.getConnection())
.perform(new TransactionWork<User>() {
#Override
public User execute(final TransactionalGraph tg) throws Exception {
TitanVertex vertex = ((TitanGraph)tg).getVertices(USER_ID, userId).iterator().next();
User u = new User(vertex.getProperty(USER_ID));//Property USER_ID has Cardinality.SINGLE
StringBuilder fullName = new StringBuilder();
for (TitanProperty titanProperty : vertex.getProperties(NAME)) {//Property NAME has Cardinality.LIST
fullName.append((String)titanProperty.getProperty(NAME));
}
u.setFullName(fullName);
/*set other properties for User
...
*/
return u;
}
}).build().oneAndDone();