Hi all,
I want to map the J2EE security model, which say that a
User may have a collection of
Roles. But I have an exception thrown, telling me that the Role object is not an instance of declaring class. Maybe my error is evident, but I cannot see anything wrong.
My database design use 3 tables (user, role, and userrole)
The userrole table has a primary key composed by the 2 foreign key (of user and role) and has also some additional columns.
My Java design use 2 classes (
ApplicationUserBean and
J2EERoleImpl ). The User has a Set of Roles as an attribute. Following the excellent "Hibernate In Action" book, page 229, I added a 3rd classe to hold the association (
J2EEUserRoleImpl).
Java POJOs:
A User, with a set of role :
Code:
public class ApplicationUserBean extends GenericBusinessBean implements ApplicationUser {
private BusinessBean foreignReference;
private String fullName;
private String j2EEUserName;
private String j2EEPassword;
private Set<J2EERoleImpl> j2EERoles;
//...getters and setters follow
...a Role :
Code:
public class J2EERoleImpl extends GenericBusinessBean {
private String j2EERoleName;
//...getters and setters follow
...and the association classe :
Code:
public class J2EEUserRoleImpl {
private ApplicationUserBean user;
private J2EERoleImpl role;
private String userName;
private String roleName;
//...getters and setters follow
Mapping documents:The Role mapping :
Code:
<class name="J2EERoleImpl" table="role" lazy="false">
<id name="id" column="id_role" type="long" unsaved-value="0" >
<generator class="identity" />
</id>
<property name="j2EERoleName" column="nom_role" type="string" not-null="true"/>
</class>
and the User mapping, which hold a set of composite elements :
Code:
<class name="ApplicationUserBean" table="utilisateur" lazy="false">
<id name="id" column="id_utilisateur" type="long" unsaved-value="0" >
<generator class="identity" />
</id>
<property name="j2EEUserName" column="nom_utilisateur" type="string" not-null="true"/>
<property name="j2EEPassword" column="mot_de_passe" type="string" not-null="true"/>
<!-- CLES ETRANGERES -->
<many-to-one
name="foreignReference"
column="id_contact"
class="com.netqi.business.beans.misc.Person"
cascade="none"
not-null="true"
unique="true"
/>
<set name="j2EERoles" lazy="false" table="role_utilisateur" cascade="all">
<key column="id_utilisateur"/>
<composite-element class="J2EEUserRoleImpl">
<parent name="user"/>
<many-to-one name="role"
class="J2EERoleImpl"
column="id_role"
not-null="true"/>
<property name="userName" column="nom_utilisateur" not-null="true"/>
<property name="roleName" column="nom_role" not-null="true"/>
</composite-element>
</set>
</class>
11:25:09 ERROR [org.hibernate.property.BasicPropertyAccessor] --> IllegalArgumentException in class: com.netqi.business.beans.security.J2EEUserRoleImpl, getter method of property: role
11:25:09 FATAL [com.netqi.persistence.hibernate.HibernateDAO] --> Problem while saving a bean
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.netqi.business.beans.security.J2EEUserRoleImpl.role
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:119)
at org.hibernate.tuple.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:61)
at org.hibernate.tuple.AbstractComponentTuplizer.getPropertyValues(AbstractComponentTuplizer.java:67)
//...
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:105)
Hibernate version: 3.0
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