java - Hibernate: mapping nested objects -EDITED- -

for example, have following tables:

user:

| userid | username | usertypeid |

usertype:

| usertypeid | usertypename |

so usertypeid foreign key user use refer usertype. java implementation such:

i have class user , class usertype, looks like:

public class user {     private int id;     private usertype ut;     .... }  public class usertype {     ... } 

in user.hbm.xml:

<hibernate-mapping>    <class name="com.pretech.user" table="user">       <meta attribute="class-description">          class contains employee detail.        </meta>       <id name="id" type="int" column="userid">          <generator class="native"/>       </id>    </class> </hibernate-mapping> 

so questions follows:

1) should put map usertype here , indicate usertype foreign key?

2) in case of user includes list of usertype (may not conceptually true want use example), such as:

public class user {     private int id;     private list<usertype> uts; } 

what shoud hibernate mapping?

edit: added explanation foreign key stuff.

there many examples available in net example, can check hibernate documentation:

for example if want have user entity set of usertype's can use one-to-many relationship , mapping file be:

<class name="user">     <id name="id" column="id">         <generator class="native"/>     </id>     <set name="uts">         <key column="userid"              not-null="true"/>         <one-to-many class="usertype"/>     </set> </class>  <class name="usertype">     <id name="id" column="id">         <generator class="native"/>     </id> </class> 

and here example documentation uses annotations , list instead of set: