org.mojavemvc.annotations

Annotation Type BeforeAction

@Retention(value=RUNTIME)
@Target(value=METHOD)
public @interface BeforeAction

A method annotated with this annotation is invoked before the @Action method is invoked. There can be only one method with this annotation in a controller or interceptor. A @BeforeAction method must accept no arguments, or accept only a RequestContext argument. Methods annotated with this annotation must not be annotated with @Action, @DefaultAction, or @InterceptedBy. A @BeforeAction method must be public.

A @BeforeAction method can return any return type, but only a View return type will have any significance. If a concrete View is returned, the @Action method is not invoked. However, if a null View is returned, or the method return type is void, then the @Action method is called.

The following are valid uses of this annotation:

 @BeforeAction
 public View doSomethingBefore() {
     return new View("before.jsp");
 }
 

 @BeforeAction
 public View doSomethingBefore() {
     return null; // keep going on to the @Action method
 }
 

 @BeforeAction
 public void doSomethingBefore() {
     // do something before and keep going on to the @Action method
 }
 

A @BeforeAction method can be used either in a controller or in an interceptor class. For more information about interceptors, see InterceptedBy.

Author:

Luis Antunes