How to assign annotation value from application.properties in Spring Boot?

Question

I have an entity/model with discriminator formula and now I'm assigning a discriminator formula like the following sample,

@Entity
@DiscriminatorFormula("type")
class Student {
    // code
}

In the same case, how can I assign discriminator value from application.properties in Spring Boot?

@DiscriminatorFormula(@Value = "${type}") is this way correct? @pandaadb — jeeva, Dec 04 '17 at 11:19
I think `@Value` annotation is disallowed for this location. — jeeva, Dec 04 '17 at 12:11
Did you try @DiscriminatorFormula("${your.app.discriminator-formula}") where your.app.discriminator-formula is a property in application.properties? — Danylo Zatorsky, Dec 12 '17 at 14:53
@jeeva check the [answer](https://stackoverflow.com/a/36915835/5873923) I gave to a similar question. I haven't tested your case, but luckily it will work. — Marc Tarin, Dec 12 '17 at 16:44

score 13 · Accepted Answer · edited Jan 05 '18 at 17:50

13

The expression in the class level annotation should be a constant, i.e., final and static. What you are trying to achieve is not possible. The best you can do is read it from a constant file rather than application.properties.

edited Jan 05 '18 at 17:50

Nick Fortescue

13,530
1
31
37

answered Dec 07 '17 at 10:20

SakshamB

279
4
13

5

Basically, you are not correct when saying "is not possible". What @jeeva wants to achieve is possible and doable but requires customising the Hibernates Annotation Binder. It can lead to problems, it is hard to do but possible and doable. – Babl Dec 07 '17 at 16:48

How to assign annotation value from application.properties in Spring Boot?

1 Answers1