如何将hibernate注释放置在字段上，但始终具有属性访问权限？ [英] How can I place the hibernate annotations on the fields, but always have property access?

问题描述

我在问，因为我想为getters / setter使用代码生成。

还因为我更喜欢映射注释出现在顶部

我想知道这种方法是否正确：

  @Entity 
 @Table（name =test）
 // @Access（AccessType.PROPERTY）//不能使用它，因为hibernate抱怨没有
 public class Test实现Serializable 
 {
 @Id 
 //我希望这会导致所有其他
 //属性的属性访问，但我不确定如何确认这个... 
 @Access（AccessType.PROPERTY）
 @Column（name =id）
 private long id = 0; 
 
 @Column（name =test_string）
 private String testString = null; 
 
 ... 
  

更新：我刚才测试了上面的例子看起来像使用字段访问来访问'testString'属性。我向getter / setter添加了日志记录，并且他们从未被调用过。另一方面，当我在'testString'字段中添加@Access（AccessType.PROPERTY）时，调用getter和setter方法。

所以目前它看起来像我唯一的选择是在每个字段前面写@Access（AccessType.PROPERTY）:-(

解决方案

1）财产访问不是坚持实体的正确方法。你持久化状态，状态存储在字段中。

2）您可以使用 @Access 注释设置要使用的访问类型为一个类。

I am asking because I would like to use code generation for the getters/setter.

And also because I would prefer the mapping annotations to appear at the top of the class, where I declare the fields.

I wonder if this approach is correct:

@Entity
@Table(name = "test")
// @Access(AccessType.PROPERTY) // cannot use this, because hibernate complains that no 
public class Test implements Serializable
{
  @Id
  // I hope this results in property access for all of the other
  // properties as well, but I am not sure how to confirm this...
  @Access(AccessType.PROPERTY) 
  @Column(name = "id")
  private long                id         = 0;

  @Column(name = "test_string")
  private String              testString = null;

  ...

Update: I just tested the above example and it looks like the 'testString' property is accessed using field access. I added logging statements to the getter/setter and they were never called. On the other hand, when I added @Access(AccessType.PROPERTY) also to the 'testString' field, the getter and setter methods were called.

So at the moment it looks like my only option is to write "@Access(AccessType.PROPERTY)" in front of every field :-(

解决方案

1) Property access isn't the right way to persist entities. You persist state, and state is stored in fields.

2) You can use the @Access annotation to set the access type to use for a class.

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