Java-根据泛型类型的字段应用不同的逻辑

Question

我有以下课程。我已将我的问题放在代码中。

public class Spec<E> implements Specification<E> {

  @Override
    public Predicate toPredicate(Root<E> root, CriteriaQuery<?> query, 
                      CriteriaBuilder builder, String key) {

     // I need to check if the string "key" is a a declared field of the type E, 
     // and if the Java type of the field is ZonedDateTime, apply a different 
     // logic

    // How can I do this ? 

  }

}