Getting auto-generated value on insert with JPA 2

Question

I am using JPA 2 to model some entities in my application. In some of the models, there are particular columns whose value is populated on insert. An example of such column would be:

@Temporal(TemporalType.TIMESTAMP)
@Column(name = "timestamp", nullable = false, insertable = false, updatable = false)
private Calendar timestamp;

Now I would like that on save, the generated value of the column would be populated automatically so that it's available from the application code. With Hibernate, I can use the @Generated annotation, however I would like to keep ORM specific code out of my application and use native JPA only.

Is this possible with just native JPA?

Thanks in advance for your time.

Answer 1

如果您想在JPA中保持这种逻辑，我想生命周期侦听器可能会有所帮助。