how to create like lombok annotation @getter?

Question

I want to create an annotation(=@MyGetter) that does this

@MyGetter
public class AnyClass {

    private String fieldVariable;

}

convert to (on compile)

@MyGetter
public class AnyClass {

    private String fieldVariable;

    public String getFieldVariable() {
        if (isHexString()) {
            return ... // process
        }
        return fieldVariable
    }
}

In short, I want to create a getter that returns a string according to a specific condition when I put the annotation I made.

how can create this?

Answer 1

Try to use JavaAnnotationProcessor to parse the custom annotation and generate the target code while compiling.