EMFManager.java 文件源码

/**
 * Get the entity manager factory.
 * @return The entity manager factory.
 */
static EntityManagerFactory getEMF() {
    if (emf == null) {
        HashMap<String, String> persistenceProperties = EMFManager.persistenceProperties;
        if (persistenceProperties == null) {
            persistenceProperties = createPersistencePropertiesFromJavaEnv();
        }
        emf = Persistence.createEntityManagerFactory("tools.descartes.petsupplystore.persistence",
                persistenceProperties);

    }
    return emf;
}