[Springframework-developer] Web MVC changes

[<jue...@we...>]

Hi web MVC users,

As you may already have noticed, I've applied quite extensive =
refactorings to the web MVC hierarchy. There are new hooks for =
customization (BaseCommandController's initBinder and onBindAndValidate) =
that required restructured internals, and a clearer and stricter use of  =
"final". On every level, subclasses can now only override the methods =
that are actually meant to be overridden by application classes.

A main addition is AbstractWizardFormController, supporting a =
wizard-style workflow via a pages property (a String array of view =
names) and abstract validatePage, processFinish, and processCancel =
methods. It also offers appropriate onBindAndValidate and referenceData =
methods with page parameter. Please consult its JavaDoc for details.

In the course of introducing the wizard controller, I've rearchitected =
the form controllers. There's AbstractFormController now, providing =
abstract showForm and processSubmit methods, being the common superclass =
of both AbstractWizardFormController and SimpleFormController. The =
latter is basically what FormController and SessionFormController were =
before, offering formView and successView properties, and various =
onSubmit methods for convenient overriding. Apropos, session handling is =
now integrated into AbstractFormController, configurable via the =
"sessionForm" property.

There's some effort involved in migration existing classes depending on =
the version that came with Rod's book, or earlier Spring CVS snapshots. =
The necessary changes should be straightforward, so I hope that they =
don't cause too much hassle. Of course, I will assist in any problems =
that might occur.

Juergen


DI J=FCrgen H=F6ller
Senior System Architect
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