22:38:17,441 WARN [PersistenceContext] Narrowing proxy to class com.intaglio.server.api.hibernate.Project - this operation breaks ==


does anyone know what this means and how do I fix it.

Here is my config file

<hibernate-mapping>
<class name="com.intaglio.server.api.hibernate.Item" table="IItem" dynamic-update="true">
<id name="id" type="long">
<column name="RID" sql-type="bigint" not-null="true"/>
<generator class="native"/>
</id>
<discriminator column="contentType" type="string"/>
<timestamp name="lastModifiedDate" column="lastModifiedDate"/>

<property name="createdDate" type="calendar" update="false" not-null="false">
<column name="createdDate" sql-type="timestamp"/>
</property>

<property name="sid" type="string" not-null="true" unique="true">
<column name="sid" sql-type="varchar" length="255"/>
</property>

<property name="name" type="string" not-null="true">
<column name="name" sql-type="varchar" length="50"/>
</property>

<property name="description" type="string" not-null="false">
<column name="description" sql-type="varchar" length="255"/>
</property>

<property name="isSecurityPolicyInherited" type="boolean" not-null="false">
<column name="isSecurityPolicyInherited" sql-type="tinyint"/>
</property>

<one-to-one name="parent" class="com.intaglio.server.api.hibernate.Item" foreign-key="parentID"/>

<many-to-one name="securityPolicy" class="com.intaglio.server.api.hibernate.SecurityPolicy" column="securityPolicyID" not-null="false"/>
<many-to-one name="owner" class="com.intaglio.server.api.hibernate.User" column="ownerID" not-null="true"/>
<many-to-one name="createdByUser" class="com.intaglio.server.api.hibernate.User" column="createdByID" update="false" not-null="true"/>
<many-to-one name="lastModifiedByUser" class="com.intaglio.server.api.hibernate.User" column="lastModifiedByID" update="false" not-null="true"/>
<many-to-one name="typeDescription" class="com.intaglio.server.api.hibernate.TypeDescription" column="typeDescriptionID" not-null="false"/>
<many-to-one name="itemWorkspace" class="com.intaglio.server.api.hibernate.Workspace" column="itemWorkspaceID" not-null="false"/>
<many-to-one name="itemProject" class="com.intaglio.server.api.hibernate.Project" column="itemProjectID" not-null="false"/>

<joined-subclass name="com.intaglio.server.api.hibernate.Facility" table="IFacility" >
<key column="RID"/>
<set name="workspaces" table="IWorkspace" lazy="true" inverse="true">
<key column="facilityID"/>
<one-to-many class="com.intaglio.server.api.hibernate.Workspace"/>
</set>
<many-to-one name="repository" class="com.intaglio.server.api.hibernate.Repository" column="repositoryID" not-null="false"/>
</joined-subclass>

<joined-subclass name="com.intaglio.server.api.hibernate.Workspace" table="IWorkspace" >
<key column="RID"/>
<many-to-one name="facility" class="com.intaglio.server.api.hibernate.Facility" column="facilityID" not-null="false"/>
</joined-subclass>

<joined-subclass name="com.intaglio.server.api.hibernate.Project" table="IProject" >
<key column="RID"/>
</joined-subclass>
</class>
</hibernate-mapping>

To really understand your problem, one would need more information. Specifically, which piece of your code triggers the warning?

Anyhow, since you have show a mapping file will inheritance, your problem is probably related to this:

http://www.hibernate.org/280.html

Unfortunately, there seem to be other cases in which retrieving polymorph collections trigger this warning without using instanceof or such, or a load with a more specific type. (I have seen another post about that). I will probably post a related topic on my own soon.