JPA / Hibernate代理不获取真实对象数据，将所有属性设置为null [英] JPA/Hibernate proxy not fetching real object data, sets all properties to null

问题描述

我在JPA中使用Hibernate并且有如下关系：

  public class PencilImpl implements Pencil {
 
 @ManyToOne（targetEntity = PersonImpl.class，fetch = FetchType.LAZY）
 @JoinColumn（name =owner，nullable = false）
私人所有者; 
 
 ... 
 
 @Override 
 public final Person getOwner（）{
 return owner; 
 
 
 
 
 $ b 
自从我开始使用LAZY获取类型以来，每次我尝试获取铅笔的所有者（ pencil.getOwner ）我得到一个非null对象，它的所有内部属性都设置为null。
 
 
 
我看起来像由Hibernate创建的代理不会从数据库中提取实际的对象。
 
 
 
任何想法？谢谢：）
解决方案
正如JB Nizet所建议的，我的类的getters中的 final 修饰符是messing用hibernate为懒惰加载关系创建的代理。
 
I'm using Hibernate with JPA and have a relationship that looks like this:
public class PencilImpl implements Pencil {

    @ManyToOne(targetEntity = PersonImpl.class, fetch = FetchType.LAZY)
    @JoinColumn(name = "owner", nullable = false)
    private Person owner;

    ...

    @Override
    public final Person getOwner() {
        return owner;
    }
}
Since I started using the LAZY fetch type, everytime I try to get a pencil's owner (pencil.getOwner) I get a non-null object that has all of it's inner properties set to null.

I looks like the proxy created by Hibernate is not fetching the real object from the database when it should.

Any ideas? Thanks :)
解决方案
As JB Nizet suggested, the final modifier in my classes' getters was messing with the proxies hibernate creates for lazy loaded relationships.

                        
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