JpaMetamodelRedGProvider.java 文件源码

public static JpaMetamodelRedGProvider fromPersistenceUnit(String perstistenceUnitName) {
    Properties properties = new Properties();
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
    EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory(perstistenceUnitName, properties);

    EntityManager entityManager = entityManagerFactory.createEntityManager();
    return new JpaMetamodelRedGProvider(entityManager.getMetamodel());
}