User.hbm.xml

<class name="User" table="users" dynamic-insert="true" dynamic-update="true">

   <id column="userID" name="userID" type="string">
      <generator class="com.clixflix.generators.EntityIDGenerator" />
   </id>
   <property name="userName" column="userName" type="string" not-null="true" length="15" />
   <property name="encrPass" column="password" type="string" not-null="true" />
   <property name="firstName" column="firstName" type="string" not-null="true" length="15" />
   <property name="lastName" column="lastName" type="string" length="20" />
   <property name="email" column="email" type="string" length="45" />

   <!-- 1:1 mapping with Address table. -->
   <many-to-one name="address"
         column="addressID"
         class="Address"
         cascade="all"
         unique="true"
         not-null="false"
         not-found="ignore"/> <!-- Address for a User is optional. So ignore if not found. -->

    <!--  1:n mapping with Rental table. -->
    <set name="rentals" table="rentals" inverse="true" cascade="all" lazy="true">
       <key column="userID" not-null="true"/>
       <one-to-many class="Rental"/>
    </set>

</class>