private EntityManager resolveExtendedEntityManager(Object target, @Nullable String requestingBeanName) {
	// Obtain EntityManager reference from JNDI?
	EntityManager em = getPersistenceContext(this.unitName, true);
	if (em == null) {
		// No pre-built EntityManager found -> build one based on factory.
		// Obtain EntityManagerFactory from JNDI?
		EntityManagerFactory emf = getPersistenceUnit(this.unitName);
		if (emf == null) {
			// Need to search for EntityManagerFactory beans.
			emf = findEntityManagerFactory(this.unitName, requestingBeanName);
		}
		// Inject a container-managed extended EntityManager.
		em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
				emf, this.properties, this.synchronizedWithTransaction);
	}
	if (em instanceof EntityManagerProxy && beanFactory != null && requestingBeanName != null &&
			beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
		extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
	}
	return em;
}
 

private EntityManager resolveExtendedEntityManager(Object target, @Nullable String requestingBeanName) {
	// Obtain EntityManager reference from JNDI?
	EntityManager em = getPersistenceContext(this.unitName, true);
	if (em == null) {
		// No pre-built EntityManager found -> build one based on factory.
		// Obtain EntityManagerFactory from JNDI?
		EntityManagerFactory emf = getPersistenceUnit(this.unitName);
		if (emf == null) {
			// Need to search for EntityManagerFactory beans.
			emf = findEntityManagerFactory(this.unitName, requestingBeanName);
		}
		// Inject a container-managed extended EntityManager.
		em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
				emf, this.properties, this.synchronizedWithTransaction);
	}
	if (em instanceof EntityManagerProxy && beanFactory != null && requestingBeanName != null &&
			beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
		extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
	}
	return em;
}
 

private EntityManager resolveExtendedEntityManager(Object target, String requestingBeanName) {
	// Obtain EntityManager reference from JNDI?
	EntityManager em = getPersistenceContext(this.unitName, true);
	if (em == null) {
		// No pre-built EntityManager found -> build one based on factory.
		// Obtain EntityManagerFactory from JNDI?
		EntityManagerFactory emf = getPersistenceUnit(this.unitName);
		if (emf == null) {
			// Need to search for EntityManagerFactory beans.
			emf = findEntityManagerFactory(this.unitName, requestingBeanName);
		}
		// Inject a container-managed extended EntityManager.
		em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
				emf, this.properties, this.synchronizedWithTransaction);
	}
	if (em instanceof EntityManagerProxy && beanFactory != null &&
			beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
		extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
	}
	return em;
}
 

private EntityManager resolveExtendedEntityManager(Object target, String requestingBeanName) {
	// Obtain EntityManager reference from JNDI?
	EntityManager em = getPersistenceContext(this.unitName, true);
	if (em == null) {
		// No pre-built EntityManager found -> build one based on factory.
		// Obtain EntityManagerFactory from JNDI?
		EntityManagerFactory emf = getPersistenceUnit(this.unitName);
		if (emf == null) {
			// Need to search for EntityManagerFactory beans.
			emf = findEntityManagerFactory(this.unitName, requestingBeanName);
		}
		// Inject a container-managed extended EntityManager.
		em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
				emf, this.properties, this.synchronizedWithTransaction);
	}
	if (em instanceof EntityManagerProxy && beanFactory != null &&
			beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
		extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
	}
	return em;
}
 

/**
 * Create an EntityManager that will always automatically enlist itself in current
 * transactions, in contrast to an EntityManager returned by
 * {@code EntityManagerFactory.createEntityManager()}
 * (which requires an explicit {@code joinTransaction()} call).
 */
protected EntityManager createContainerManagedEntityManager() {
	return ExtendedEntityManagerCreator.createContainerManagedEntityManager(this.entityManagerFactory);
}