Does anyone have an example implementation of Ray Cromwell's article on "Making JDO/JPA enhanced classes work over GWT RPC"? (http:// timepedia.blogspot.com/2009/04/google-appengine-and-gwt-now- marriage.html)
I am unable to get the second part of his code into my IDE without errors and am unsure how to implement it: public <T> T mergeTransient(T tInstance) { EntityManager e = em.get(); if(e.contains(tInstance)) { e.persist(tInstance); return tInstance; } else { Object primaryKey = PersistenceHelper.findPrimaryKey(tInstance); if(primaryKey != null) { Object entity = e.find(tInstance.getClass(), primaryKey); if(entity == null) { e.persist(tInstance); return tInstance; } else { try { PersistenceHelper.copyPersistentFields(entity, tInstance); } catch (IllegalAccessException e1) { e1.printStackTrace(); throw new IllegalArgumentException("Can't copy fields from transient class to persistent class."); } catch (NoSuchMethodException e1) { throw new IllegalArgumentException("Can't copy fields from transient class to persistent class."); } catch (InvocationTargetException e1) { throw new IllegalArgumentException("Can't copy fields from transient class to persistent class."); } e.persist(entity); return (T) entity; } } else { // primary key may be null, assume insert e.persist(tInstance); return tInstance; } } } If anyone has been able to successfully use this workaround and is will to share example code I would appreciate it! Thanks, Mike --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---