Thanks for the quick reply. Step 1. enhanced the persistent classes at the build time
Step 2. added the openjpa.DetachState property, also tried other DetachState setting. Result: Castor still can not serialize the detached objects. The marshall result is still empty xml. Any suggestion? Hello, try the following configuration [1] <property name="openjpa.DetachState" value="loaded(DetachedStateField=false)"/> OpenJPA detached object instance x (optionally) can carry a StateManager (pcStateManager) instance sm(x) which can track changes in x while x is not under OpenJPA managed context. This makes merging of x into a OpenJPA managed context more effective. The above configuration makes the detached instance x' serialization compatible with original x. Serialization behavior does change based on the detach state configuration and most likely not liked by Castor's marshaller. To narrow the cause, you should also enhance your domain classes at build-time [2]. [1] http://openjpa.apache.org/builds/latest/docs/manual/manual.html#ref_guide_detach_graph [2] http://openjpa.apache.org/builds/latest/docs/manual/manual.html#ref_guide_pc_enhance_build 1. Environment: java1.5, OpenJPA 1.2.1 , castor 1.2 2. any object retrieved from database by OpenJPA cannot be serialized to xml by castor. No error message from org.exolab.castor.xml.Marshaller . The result xml file is completely empty 3. When the same persistent class is instantiated by "new" operator, the instantiated object can be serialized by castor. 4. The only different between "openJPA detached objects" and "new instantiated objects" is the "openJPA detached objects" has member pcStateManager = null. Questions: 1. is this behavior related the pcStateManager member in the detached persistent objects? 2. What is the purpose of pcStateManager ? 3.How does it affect the serialization behavior ? -- View this message in context: http://n2.nabble.com/openJPA-detached-object-can-not-be-serialized-by-Castor.--is-it-related-with-pcStateManager--tp2636117p2637257.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
