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Custom XML Validation on top of schema validation [message #173375]

Thu, 06 July 2006 15:50

Brian Jakubik

Messages: 140
Registered: July 2009

Senior Member

Im trying to implement custom validation, on top of the schema validation.

What WTP gives me out of the box is great (schema validation), but i want to
add on top of that specific things that the schema cannot catch (such as
presence/absence of certain tags when the parent has attributes set, ...)

I have the extension point org.eclipse.wst.validation.validator with
org.eclipse.wst.xml.core.internal.validation.core.Helper and my own run
class that basically ends up to the XMLValidator now, and it runs when the
file is saved.

Now I want to nix the XMLValidator and do my own thing here. My question is
this, what should I do from here, do I get a DOM and check the things from
that, Is there a way to extend the SAX parse to catch it, or something else
I dont know about... I have never used SAX before and am somewhat new to
the validation thing.

Hope all that makes sense.

I thank you for your suggestions.

Cheers
Brian J

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Re: Custom XML Validation on top of schema validation [message #174152 is a reply to message #173375]

Wed, 12 July 2006 17:47

Lawrence Mandel

Messages: 486
Registered: July 2009

Senior Member

Hi Brian,

>Now I want to nix the XMLValidator and do my own thing here. My question
is
>this, what should I do from here, do I get a DOM and check the things
from
>that, Is there a way to extend the SAX parse to catch it, or something
else
>I dont know about... I have never used SAX before and am somewhat new to

>the validation thing.

You can use either method. Here is a simplified overview. DOM is useful if
you need to build the entire model before validating, as is the case with
WSDL. For example, if you want to check that references amoung elements
are correct. SAX is lighter weight than DOM and is useful if you want to
check the current element. For example, if you want to implement naming
convention checks where all you're checking is the name of the current
element.

You can find more information about DOM and SAX from the Xerces site [1]
and from the W3C [2].

[1] http://xerces.apache.org
[2] http://www.w3.org/DOM/

Lawrence

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Re: Custom XML Validation on top of schema validation [message #174459 is a reply to message #174152]

Fri, 14 July 2006 14:57

Brian Jakubik

Messages: 140
Registered: July 2009

Senior Member

Thanks Lawrence,
Here is what I ended up doing, my runtime side has rules validation that i
need, and I wanted to try to reuse that, I ahve my validator action ...
setup very similar to the XML validator, and instead of using the XML one, I
use mine and return the XMLValidationreport with my errors in it.

Works as I would like it to, although I am implementing and using some
internal/provisional classes, but it is experimanetal for now.

<lmandel@ca.ibm.com> wrote in message news:e93cjk$hqa$2@utils.eclipse.org...
> Hi Brian,
>
>>Now I want to nix the XMLValidator and do my own thing here. My question
> is
>>this, what should I do from here, do I get a DOM and check the things
> from
>>that, Is there a way to extend the SAX parse to catch it, or something
> else
>>I dont know about... I have never used SAX before and am somewhat new to
>
>>the validation thing.
>
> You can use either method. Here is a simplified overview. DOM is useful if
> you need to build the entire model before validating, as is the case with
> WSDL. For example, if you want to check that references amoung elements
> are correct. SAX is lighter weight than DOM and is useful if you want to
> check the current element. For example, if you want to implement naming
> convention checks where all you're checking is the name of the current
> element.
>
> You can find more information about DOM and SAX from the Xerces site [1]
> and from the W3C [2].
>
> [1] http://xerces.apache.org
> [2] http://www.w3.org/DOM/
>
> Lawrence

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