RE: [FormProc-developer] RE: Validation by type

[Anthony E. <me...@an...>]

Ah ha...I think I understand it now.  So you want to be able to say
"validate a field of this type (i.e. type phoneCanada), and the fields name
is phoneWork".  Now that I get it I see the benefit for reuse as it would
allow you define a validator for a data type and then reuse that validator
for many different named fields.  I will look into it today or tomorrow.

-Anthony

> -----Original Message-----
> From: for...@li...
> [mailto:for...@li...]On Behalf Of Eric
> Beaumier
> Sent: Tuesday, January 22, 2002 12:02 PM
> To: for...@li...
> Subject: [FormProc-developer] RE: Validation by type
>
>
>
> Hi Anthony,
>
> The goal of this demand, it's just to give the option to the user,
> to use FormProc as "validation by name" or "validation by type".  It's
> not necessarily for a DBForms compatibility.
>
>
> If I re-use the same example, here I have 4 textfields using the same
> type of validation ("phoneCanada") and it can be re-use again in
> several other JSP pages.
>
> <db:textField fieldName="phoneWork" fieldValidator="phoneCanada"/>
> <db:textField fieldName="phoneHome" fieldValidator="phoneCanada"/>
> <db:textField fieldName="phoneCell" fieldValidator="phoneCanada"/>
> <db:textField fieldName="fax"       fieldValidator="phoneCanada"/>
>
> Actually, if I want to do validation, I need to create 4 elements
> ("phoneWork", "phoneHome", "phoneCell", "fax") in "example-form.xml"
> and if fieldname haven't the same name in other JSP pages, we
> must to create
> as much of elements in "example-form.xml" as we have differents
> fieldnames ...
>
> Like this we will do a lot of duplication of element/validator and in
> reel, it's the same validation.
>
>
>
> To continue, maybe we can re-use FormProc for parameter validator
> in EJB, Web apps, Web Service, ... on the same server.  This give you
> the opportunity to declare "Enterprise Validation Type" (EVT).
> You declare each type of validator in your xml file and it can be
> re-use by any kind of applications on this server ...   or remotly
> using EJB.
>
> Because enterprise web server contains a lot of differents web
> apps on the
> same server and frequently use the same validation type, like this
> we can re-use it ...
>
> By adding the "context" (getter/setter) to the "FormData" class,
> when we call the process method, we will be enable to pass a context
> of this validation.
>
> ArrayList formDataList = new ArrayList();
> formDataList.add(new FormData("phoneCanada",
>                               request("phoneWork"),"phoneWork"));
> formDataList.add(new FormData("phoneCanada",
>                               request("phoneHome"),"phoneHome"));
> ...
>
> But if a user want to work in "name" mode, it can continue to use
> the FormData("elementName", "value") constructor.
>
>
> Naturally, we need to be enable to retrieve the context in validation
> result.
>
> I think it's a good way to manage re-usable validation of data.  Without
> modifying the core of FormProc.
>
>
> Thanks.
>
>
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