Annotation java + spring boot

Question

I need to take an attribute of an object and modify its value via Annotation, for example:

    public class MeuDTO {
    
    @AlgumaAnnotation
    private String meuAtributo;
}

I created the note:

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface AlgumaAnnotation {
}

And now, somehow, I need to get the value of this attribute in a method, apply a parse rule and return to this object (because I get it via a controller method and this value is encrypted):

@GetMapping
public ResponseEntity<?> buscarProdutos(MeuDTO requestDTO) {

}

I want to create any method that receives this attribute, decrypt it and return the value from where it came, ex:

class ClasseDaLogica {
    public String fazOParse() {
        // retorna o valor parseado
    }
}

Is there any way to do that ?