public void injectLifecycle(EntityManagerFactory entityManagerFactory, JpaGpsDevice device) throws JpaGpsDeviceException { CompassGpsInterfaceDevice gps = (CompassGpsInterfaceDevice) device.getGps(); if (eventListener == null) { eventListener = new TopLinkEssentialsEventListener(device); } EntityManager entityManager = (EntityManager) entityManagerFactory.createEntityManager(); Session session = entityManager.getServerSession(); entityManager.close(); Map descriptors = session.getDescriptors(); for (Object o : descriptors.values()) { ClassDescriptor classDescriptor = (ClassDescriptor) o; Class mappedClass = classDescriptor.getJavaClass(); // if we have a parent class that is mapped in JPA and in Compass, then don't add an event listner // since we will add it to the parent descriptor and it will notify this class as well if (classDescriptor.isChildDescriptor()) { Class parentClass = classDescriptor.getInheritancePolicy().getParentDescriptor().getJavaClass(); if (gps.hasMappingForEntityForMirror(parentClass, Cascade.ALL)) { classDescriptor.getEventManager().addListener(dummyEventListener); continue; } } if (gps.hasMappingForEntityForMirror(mappedClass, Cascade.ALL)) { classDescriptor.getDescriptorEventManager().addListener(eventListener); } } }