如何将Hibernate代理转换为真实实体对象 [英] How to convert a Hibernate proxy to a real entity object

问题描述

在休眠Session期间，我正在加载一些对象，由于延迟加载，其中一些对象已作为代理加载.没关系，我不想关闭延迟加载.

During a Hibernate Session, I am loading some objects and some of them are loaded as proxies due to lazy loading. It's all OK and I don't want to turn lazy loading off.

但是稍后我需要通过RPC将一些对象(实际上是一个对象)发送到GWT客户端.碰巧这个具体对象是代理.所以我需要将其变成一个真实的对象.我在Hibernate中找不到类似实现"的方法.

But later I need to send some of the objects (actually one object) to the GWT client via RPC. And it happens that this concrete object is a proxy. So I need to turn it into a real object. I can't find a method like "materialize" in Hibernate.

如何知道某些对象的类和ID，将它们从代理变为实物?

How can I turn some of the objects from proxies to reals knowing their class and ID?

目前，我看到的唯一解决方案是从Hibernate的缓存中逐出该对象并重新加载它，但这确实很糟糕，原因有很多.

At the moment the only solution I see is to evict that object from Hibernate's cache and reload it, but it is really bad for many reasons.

推荐答案

这是我正在使用的方法.

Here's a method I'm using.

public static <T> T initializeAndUnproxy(T entity) {
    if (entity == null) {
        throw new 
           NullPointerException("Entity passed for initialization is null");
    }

    Hibernate.initialize(entity);
    if (entity instanceof HibernateProxy) {
        entity = (T) ((HibernateProxy) entity).getHibernateLazyInitializer()
                .getImplementation();
    }
    return entity;
}

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