com.gwtplatform.dispatch.rpc.server.actionvalidator

Interface ActionValidator

All Known Implementing Classes:

AbstractDefaultActionValidator, DefaultActionValidator, DefaultActionValidator

public interface ActionValidator

Implementers must provide an implementation of this interface and provide it to the DispatchService implementation so that it can check whether or not the action can be executed. Doing so will often require session information, which can be done by injecting a Provider<HttpSession> into the validator and calling httpSessionProvider.get() within the isValid(com.gwtplatform.dispatch.rpc.shared.Action<? extends com.gwtplatform.dispatch.rpc.shared.Result>) method.

You should think of annotating your validators with @RequestScoped or @Singleton.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isValid(Action<? extends Result> action) Validate whether or not that Action can be executed at this time.

Method Detail

isValid

boolean isValid(Action<? extends Result> action)
                throws ActionException

Validate whether or not that Action can be executed at this time. You can also throw an ActionException if you want to fine grain why the validator failed.

Parameters:

action - The action that called this validator.

Returns:

true if the action can be executed, false otherwise.

Throws:

ActionException