On 19.Jul.2001 -- 05:00 PM, Peter Nuetzel - inglobo wrote:
> I've implemented something similar:
>
> My form descriptor is similar to the XForms WD. I've made some
> simplifications and some enhancements to allow simple processing and
> validation definitions.
>
> example form control:
> <textbox ref="person/user-id">
> <caption>User ID</caption>
> <validate type="null">User ID must be specified.</validate>
> <validate type="string" minlen="5" maxlen="20">The User ID must
> have 5 to 20 characters</validate>
> <validate type="unique">The User ID is already used. Please enter
> an other.</validate>
> </textbox>
Looks good.
> The response from the client (ServletRequest) is evaluated by an Action. On
> the first request of the form an XMLFragment (Node, DocumentFragment) is
> created from the default instance data in the form descriptor or the
> referenced XML data (using XLink). The request values from the HTML form
> are validated and written to the DOM Node. The DOM Node is saved as request
> attribute or in the session if needed over more requests (multipage forms).
> If the submitted form data is not valid according to the information in the
> form descriptor the Action redirects the user request to the form
> presentation again. There I use an extented TraxTransformer to pass the
> updated DOM Node (instance data) and the validation result to the XSLT
> sheet as parameters (as XPath node-set).
Great.
> My multipage solution is very simple. I define a total number of pages in
> my form descriptor and the same amount of form elements with corresponding
> page attributes:
>
> <form-descriptor pages="3">
> <instance/>
> <form page="1"/>
> <form page="2"/>
> <form page="3"/>
> </form-descriptor>
>
> The disadvantage of this solution is that only multi page forms with a
> sequential process can be declared. But I dont need other ;-)
Perhaps it can be extended. I wouldn't miss it ;-)
> I would like to donate my stuff. But I must admit its a very raw hack and
> needs lots of refactoring. And I've only implemented the things I really
> needed for my project (of course ;).
Even greater! It's million times better than to start from scratch!
Chris.
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