Java add annotation to class based on condition

Asked Aug 01 '18 at 18:22

Active Aug 01 '18 at 18:22

Viewed 1,889 times

I was wondering if it is possible to add an annotation to a Java class based on a condition.

For example, suppose I have two standard classes (Foo and Bar) and an abstract one (AbstractGeneric). Can I add an annotation to AbstractGeneric just if Foo extends it?

I searched and just found some people suggesting using Adapter, but I never used it. If it is possible, could someone give me a simple example on how to implement that?

asked Aug 01 '18 at 18:22

Alexandre Miziara

why can't you just use the annotation on the `Foo` class? – Jack Flamp Aug 01 '18 at 18:24
@JackFlamp because if `Bar` extends `AbstractGeneric`, I should use a different annotation. – Alexandre Miziara Aug 01 '18 at 18:26
if it is a custom annotation you can use an attribute and set different values to it and change behaviour based on that value.. would that work? – Jack Flamp Aug 01 '18 at 18:28
it would I believe, but I can't change the annotation, once it is from a core library. Is it possible to add an annotation to a classe before create a new instance of it? – Alexandre Miziara Aug 01 '18 at 18:31
I guess [this](https://stackoverflow.com/a/1635122/3959856) is what you have looked at. like he says, you can't add it dynamically. could there be a totally different solution to the problem you are trying to solve? – Jack Flamp Aug 01 '18 at 18:35
yes, do you have any suggestions? – Alexandre Miziara Aug 01 '18 at 18:43
I would google the adapter pattern and read the examples. it is not too advanded. – Jack Flamp Aug 01 '18 at 18:47
thank you, I'm trying it right now. – Alexandre Miziara Aug 01 '18 at 18:48
It sounds like you would be better off using an abstract method than an annotation. – VGR Aug 01 '18 at 21:03

Java add annotation to class based on condition

0 Answers0