使用自定义注释从抽象类中调用特定的子方法

Question

I have a abstract class containing run() method and few children classes overriding run method with different implementation. There a custom annotation class also, each child class has this annotation with different value to distinguish each child class. I was to call this run method for each child class from abstract class object using these annotations without using child class name. Is it possible or there some other way to do this?

CODE IS HERE-------

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface CustomAnno {
    public String name();
}

public abstract class AbstractClass {

    abstract void run();

}

@CustomAnno(name="one")
public class ExtendingClassOne extends AbstractClass {

    @Override
    void run() {
        System.out.println("class one extending");

    }

}

@CustomAnno(name="two")
public class ExtendingClassTwo extends AbstractClass {

    @Override
    void run() {
        System.out.println("class two extending");

    }

}

So having abstract class and annotation values "one" and "two", can I call run method for each child class without using child class name.

Answer 1

We can use ClassPathScanningCandidateComponentProvider spring library to list all the classes that use a particular kind of annotation. Here annotations can be custom or default one. So putting annotations on all child classes that extend that abstract class can give list of only those child classes only. This solved my problem.