org.tynamo.jdo.internal
Class EntityPersistentFieldStrategy

java.lang.Object
  org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy
      org.tynamo.jdo.internal.EntityPersistentFieldStrategy

All Implemented Interfaces:

org.apache.tapestry5.services.PersistentFieldStrategy

public class EntityPersistentFieldStrategy
extends org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy

Persists JDO entities by storing their object ID in the session.

By definition, the object ID of a JDO object is serializable; thus, there is no problem with using the actual object for persisting it in the session (that is roughly the reason why JDO requires the object ID to be serializable in the first place).

See Also:

PersistedEntity

Constructor Summary

EntityPersistentFieldStrategy(javax.jdo.PersistenceManager pm, org.apache.tapestry5.services.Request request)

Method Summary

protected Object	convertApplicationValueToPersisted(Object persistentObject) Converts the persistent entity into a serializable object that can be safely stored into the session.
protected Object	convertPersistedToApplicationValue(Object persistedValue) Converts the persisted value from the session into a full blown persistent JDO object.

Methods inherited from class org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy

didReadChange, discardChanges, gatherFieldChanges, postChange

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EntityPersistentFieldStrategy

public EntityPersistentFieldStrategy(javax.jdo.PersistenceManager pm,
                                     org.apache.tapestry5.services.Request request)

Method Detail

convertApplicationValueToPersisted

protected Object convertApplicationValueToPersisted(Object persistentObject)

Converts the persistent entity into a serializable object that can be safely stored into the session.

Technically, the PersistedEntity is unnecessary as the JDO object ID already represents the class and the id value (thus, it's redundant to create the PersistedEntity

Overrides:

convertApplicationValueToPersisted in class org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy

Parameters:

persistentObject - the JDO object to be persisted in the session

Returns:

a representation of the persisted entity

convertPersistedToApplicationValue

protected Object convertPersistedToApplicationValue(Object persistedValue)

Converts the persisted value from the session into a full blown persistent JDO object.

Overrides:

convertPersistedToApplicationValue in class org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy

Parameters:

persistedValue - the value representing the persistent object.

Returns:

a persistent entity retrieved from JDO