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From "Ivelin Ivanov" <ive...@apache.org>
Subject Re: [Proposal] Implementing XMLForm with Flow
Date Fri, 06 Dec 2002 05:35:54 GMT

Sorry I wasn't clear before.
I know you can call Java from the flow.
The question is how to use the flow in a way which significantly reduces
code
while making the maintenance easier and improving the readability.

Try to beat the existing XMLForm wizard demo.
If you succeed, it will be great !

Fingers crossed,

Ivelin


----- Original Message -----
From: "Ugo Cei" <u.cei@cbim.it>
To: <cocoon-dev@xml.apache.org>
Sent: Thursday, December 05, 2002 2:36 AM
Subject: Re: [Proposal] Implementing XMLForm with Flow


> Ivelin Ivanov wrote:
> > I hope you are the last hero trying to confront this monster.
> >
> > The discussion how to combine the two has been going on forever, but we
have
> > not come to an agreement.
>
> I'm currently recovering the previous threads from the archive and
> reading them.
>
> > I would gladly offer my tactical guidance for your effort.
>
> Thank you.
>
> > If I was to do this with Actions, I could use well known and
standardized
> > Java APIs - JWSP or JDBC.
>
> But, as Ovidiu pointed out, you can!
>
> var schemaFactory =
>    Packages.org.apache.cocoon.components.validation.SchemaFactory.lookup
>      ("http://www.ascc.net/xml/schematron");
> var is = new Packages.org.xml.sax.InputSource
>    ("flows/newuser-schema.xml");
> var schema = schemaFactory.compileSchema(is);
> var validator = schema.newValidator();
> validator.setProperty("http://xml.apache.org/cocoon/validator/phase",
>    "NewUser");
> violations = validator.validate(userBean);
>
> This is just a quick hack I put together looking at the code for the
> AbstractXMLFormAction and Form, but it works. I just need to define some
> symbolic constants for the namespaces and find a way to access a
> SourceResolver from JavaScript to make it pretty.
>
> Anyway, if you prefer to write complex business logic in Java (and I'd
> agree wholeheartedly with that), you can encapsulate it in a Java method
> that returns a boolean or an index to drive the flow that will be
> implemented by an if/then/else or a switch in JavaScript.
>
> What do we gain by this? We remove flow logic from the sitemap in the
> form of actions and put it in the flowscript, where it belongs (IMHO).
>
> Ugo
>
> --
> Ugo Cei - http://www.beblogging.com/blog/
>
>
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