hi all

User spToSave =new User();
spToSave.setUserGroup(userGroup);

<--userGroup been passed is a set, the field in obj class is also a set. however i get the folowing error

net.sf.hibernate.MappingException: Unknown entity class: java.lang.String

user.hbm.xml excerpt is as follows:

<class name="com.da.vcrmanager.data.User" proxy="com.da.vcrmanager.data.User" table="USERS">
<id name="id" column="uid" type="long">
<generator class="increment"/>
</id>
<property name="name"/>
<property name="username" not-null="true" type="string"/>
<property name="password"/>

<bag name="roles" table="USER_ROLES" lazy="false" cascade="save-update">
<key column="user_id"/>
<many-to-many class="com.da.vcrmanager.data.Role" column="role_id" outer-join="auto"/>
</bag>

<set name="userGroup" table="usergroups" cascade="all" lazy="false">
<key column="user_id" />
<one-to-many class="com.da.vcrmanager.data.UserGroup" />
</set>
</class>