Can the annotation variables be determined at runtime?

by

No, that’s not possible.

Annotations are stored in the class file as constant values and can’t be computed at runtime.

The best you can do is store some kind of “instructions” on how to compute the value.

For example you could store a simple expression in some scripting language and execute that when reading the annotation value or you could specify the name of a method to call to get the real value. One example of such a langauge is the Spring Expression Language (SpEL) used in Spring.

More Related Contents:

  1. Only one annotation is showing
  2. When do you use Java’s @Override annotation and why?
  3. Do I need elements in persistence.xml?
  4. Only using @JsonIgnore during serialization, but not deserialization
  5. Xml configuration versus Annotation based configuration [closed]
  6. What is the use of marker interfaces in Java?
  7. Should we @Override an interface’s method implementation?
  8. Which types can be used for Java annotation members?
  9. How and where are Annotations used in Java?
  10. Is there something like Annotation Inheritance in java?
  11. Why doesn’t a missing annotation cause a ClassNotFoundException at runtime?
  12. Retrieve Java Annotation Attribute
  13. can someone please explain me @MapsId in hibernate?
  14. How can I reload properties file in Spring 4 using annotations?
  15. How to scan multiple paths using the @ComponentScan annotation?
  16. How to supply Enum value to an annotation from a Constant in Java
  17. Error setting a default null value for an annotation’s field
  18. intellij incorrectly saying no beans of type found for autowired repository
  19. How to find annotated methods in a given package?
  20. Annotating the functional interface of a Lambda Expression
  21. Where should I put @Transactional annotation: at an interface definition or at an implementing class?
  22. Inherited abstract class with JPA (+Hibernate)
  23. Multiple annotations of the same type on one element?
  24. org.hibernate.MappingException: Could not determine type for: java.util.Set [duplicate]
  25. Accessing source code from Java Annotation Processor
  26. What is the default annotation processors discovery process?
  27. Android Retrofit Parameterized @Headers
  28. JPA Criteria Tutorial [closed]
  29. RetentionPolicy CLASS vs. RUNTIME
  30. What are annotations and how do they actually work for frameworks like Spring?

Leave a Comment