Question

I have the following two table (which are tied in with Spring security – but the issue I believe is with Hibernate):

Table user
Table authority

The user table is tied (through Hibernate) to a domain object in my application: class User, which has the following attributes (and corresponding getters and setters), which correspond to columns in the user table (except for the Collection which is explained later):

long uId
String username
String password
...
Collection<GrantedAuthority> authorities

The authority table has 2 columns: UserId (foreign key into user table), and Authority (e.g. “ROLE_USER”). This table is NOT represented as a domain object, but is simply a collection in the User class.

To create the mapping, in my .hbm file I use the following:

<class name="com.business.project.domain.User" table="user">
    <id name="uId" column="UserId"></id>
    <property name="username" column="Name" type="java.lang.String" />
    <property name="password" column="Password" type="java.lang.String" />
    ...
    <set name="authorities" table="authority">
        <key column="UserId" />
        <element column="Authority" type="java.lang.String" />
    </set>
</class>

In my hibernate DAO implementation, I create a query object, execute the query, and cast the result to a User object:

...
Query query = session.createQuery("from User where name = :username");
...
User user = (User) query.uniqueResult();

At this point, I would expect this object to be populated with the data that it pulled from the DB (I made sure that the tables are populated properly with test data and the mapping names are correct in the mapping file).

However, calling the getter methods for various attributes on the user object all return NULL for some reason. Can somebody see something immediately wrong with my setup? Perhaps I mapped the collection (to foreign key relationship) wrong? THANKS!

Update: here is the sql query that hibernate generated (taken from its DEBUG output):

Hibernate: select user0_.UserId as UserId1_, user0_.Name as Name1_, 
  user0_.Password as Password1_ from user user0_ where user0_.Name=?

For some reason, it doesn’t show anything related to the authority table…does this mean that my mapping is incorrect?

Edit: Per bozho’s suggestion, I took a look at the messages on the consol on startup (tomcat), but didn’t see anything out of the ordinary:

Feb 16, 2010 10:35:12 AM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues
INFO: Mapping class: com.me.project.domain.User -> user
Feb 16, 2010 10:35:12 AM org.hibernate.cfg.HbmBinder bindCollection
INFO: Mapping collection: com.me.project.domain.User.authorities -> authority

Answer 1

Query query = session.craeteQuery("FROM User WHERE username = :username");
query.setString("username", "SomeUserName");

That should pretty much do it.