英文:
Is Persistence.getPersistenceUtil a simpler way of testing whether a lazy loaded JPA collection is initialized when using Spring Boot repositories
问题
这个问题在这里有答案 - https://stackoverflow.com/questions/4306463/how-to-test-whether-lazy-loaded-jpa-collection-is-initialized
在那里给出的答案使用了 PersistenceUnitUtil。然而，为了获得一个 PersistenceUnitUtil，您需要访问 EntityManagerFactory。Spring 框架使用 repositories 来隐藏所有的 EntityManager 相关内容，这使得该解决方案变得尴尬（但不是不可能）。
然而，在标准的 JPA 中有一种访问类似对象 PersistenceUtil 的方式 - 就像是 Persistence.getPersistenceUtil - 它提供了一个具有与上面答案中使用的相同方法的对象。
在 Spring 框架中，使用 repositories，这似乎是一个更简单的访问那些有用的 isLoaded 方法的方式。
是否有任何理由不使用这种更简单的方法？
英文:
This question is given an answer here - https://stackoverflow.com/questions/4306463/how-to-test-whether-lazy-loaded-jpa-collection-is-initialized
The answer given there makes use of PersistenceUnitUtil. However, in order to get a PersistenceUnitUtil you need to access the EntityManagerFactory. Spring framework uses repositories to hide all that EntityManager stuff, which makes that solution awkward (but not impossible).
However there is a standard JPA way of accessing a similar object PersistenceUtil - just as Persistence.getPersistenceUtil - which provides an object with the same methods used in the above answer.
In the Spring framework, using repositories, this appears to be a much simpler way to access those helpful isLoaded methods.
Is there is any reason not to use that simpler approach?
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