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3.x:

Hi,

I am facing a problem converting Hibernate objects (i.e. POJOs) to XML. I am using XStream to convert the objects into XML, but when I pass the object to XStream, it does'nt seem to find the actual fields but gives some other fields with even the class name suffixed with something like "EnhancerByCGLIB--411188b1 resolves-to="org.hibernate.proxy.SerializableProxy"

Here is an example of the XML output given by XStream

<edu.utd.eplan.business.objects.Facility--EnhancerByCGLIB--411188b1 resolves-to="org.hibernate.proxy.SerializableProxy">
<entityName>edu.utd.eplan.business.objects.Facility</entityName>
<persistentClass>edu.utd.eplan.business.objects.Facility</persistentClass>
<interfaces>
<java-class>org.hibernate.proxy.HibernateProxy</java-class>
</interfaces>
<id class="int">2</id>
<getIdentifierMethodClass>edu.utd.eplan.business.objects.Facility</getIdentifierMethodClass>
<setIdentifierMethodClass>edu.utd.eplan.business.objects.Facility</setIdentifierMethodClass>
<getIdentifierMethodName>getFacilityId</getIdentifierMethodName>
<setIdentifierMethodName>setFacilityId</setIdentifierMethodName>
<setIdentifierMethodParams>
<java-class>java.lang.Integer</java-class>
</setIdentifierMethodParams>
</edu.utd.eplan.business.objects.Facility--EnhancerByCGLIB--411188b1>

If I take a plain POJO without associating it with Hibernate Session i.e. I manually populate the fields, I get the correct XML output depicting the actual fields and their values.

I am using Hibernate framework with Spring framework. From the above output it seems that Hibernate is modifying the class through reflection. How can I get back the normal class or is there any other way to convert these objects to XML automatically (I am looking for available packages rather than writing my own code to do the conversion).

Thanks in advance
Phani

Hi,

Do you retrieve your Facility-object from another hibernate-managed object?

When hibernate utilizes lazy-loading it will replace all contained object with proxies that will only be intialized on access during the session, and it seems this is what you're passing to XStream.

If you want to avoid this you could either disable lazy-loading for this property in the mapping-file or you could resolve the proxy manually.
To replace a Proxy for myObject by the real class you could use Hibernate.isInitialized(myObject) to check, if the proxy is already resolved and if it isn't call Hibernate.initialize(myObject) to get the proper object.

Hi,

Thanks a lot. That seems to work. But the problem is if there is tree of objects i.e. collection of objects within Facility and each of the objects in the collection, themselves have other collections, how do I initialize all of them in single go. Looks like I explicitly have to initialize all of collections. Is there any other way apart from enabling disabling lazy initialization?

Thanks
Phani