How to use custom type annotations in Java

Question

Java 8 has feature called Type annotations (JSR 308). I would like to use it for simple Object to Object mapper framework. I would like define annotation @ExpectedType like this

Answer 1

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface SearchDefinition {

    public String identifier() default "";

}

@SearchDefinition - can be used anywhere