Validation interceptor

[p hasini]

Does a validation interceptor provide fromt end validation or back end validation

[David Newton]

How would an interceptor, running on the server during the request cycle, provide front-end validation, running on the client?

In any case, the validation interceptor does back-end validation.

[p hasini]

During validation,we use Validation interceptor.This interceptor displays the messages from Actionclass-validation.xml file.

Then what is the use of validate() method in oour Action class.

[David Newton]

No, the validation interceptor initiates the server-side validation. Tags in the JSP display the messages.

The validate() method can be used to run custom validation, including business logic, etc. for which the validation XML or annotation configuration isn't suitable.

[p hasini]

Do we write validate() method only for back end validation?

[David Newton]

Yes--it runs on the server; how would it do anything on the client?