@Conditionalonexpression on a class object getter

Question

I was wondering if there is a way to enable a class using @conditionalonexpression during runtime by evaluating an object of a class which gets its value at runtime.

FOr example:

@ConditionalOnExpression(#{propertyobject.getexenabled()})
class ex1{

}

propertyobject instance is filled with value at runtime(Say at the beginning of the program) Is this possible to be achieved?

Answer 1

Yes, it is possible but getexenabled() method should be static.

Like:

@SpringBootApplication
public class So44456388Application {

    public static void main(String[] args) {
        SpringApplication.run(So44456388Application.class, args);
    }

    public static class Evaluator {
        public static boolean getexenabled() {
            //your logic here
            return true /*false*/;
        }
    }

    @Component
    @ConditionalOnExpression("#{T(com.stackoverflow.so44456388.So44456388Application$Evaluator).getexenabled()}")
    public static class RichBean {
        @PostConstruct
        private void init() {
            System.out.println("RichBean");
        }
    }
}