How to cast resultset in rowmapper to an enum?

Question

I have my rowmapper like:

private static final class UserRowMapper implements RowMapper<User> {

    User user = new User();

      user.setId(rs.getInt("id"));
      user.setUserType( (UserType)rs.getInt("userType")); // ?????

    return user;

}

So I am trying to cast the integer value in the db for userType to the enumeration UserType.

Why doesn't this work?

Solution 1

Cast it? No, can't be done.

You can call valueOf to get the Enum value from the String, as long as the String is valid.

Solution 2

You can index into Enum.values():

user.setUserType( UserType.values()[rs.getInt("userType")] );

You might want to put in some error checking. :)