xpath queries

Hi,

Is there some solution for supporting XPath queries in Pharo?

Cheers,
Doru

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Hi Doru,

There is a PetitXPath... not complete (just the functionality I needed). And it relies on PetitXml, not html... but I can be easily adapted.

cheers,
Esteban

El 19/12/2011, a las 8:43a.m., Tudor Girba escribió:


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Hi Doru,

as far as I know there is no XPath-support. However, I've recently  
implemented a package (SimpleXPath) that provides support for XPath  
location paths (without predicates). A path can be parsed from an XPath  
string or constructed with ST code as well. I've
The downside is that is implemented in VisualWorks. I didn't have the time  
yet to port it to Pharo, although I'd like to have that port, too. I'd be  
happy if you're interested in helping with this port.

Regards, Steffen


Am 19.12.2011, 12:43 Uhr, schrieb Tudor Girba <[hidden email]>:

> Hi,
>
> Is there some solution for supporting XPath queries in Pharo?
>
> Cheers,
> Doru
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Thanks, Esteban.

I gave it a try, but I cannot seem to make it work (and there are no tests :)).

Here is an example of what I tried:
xml := '<root>
        <topChild/>
</root>'.
element := PPXmlParser parse: xml.
element find: 'root/topChild'

I get an invalid index error in PPXPathIndexFilter>>resolveOn:.

Am I doing something wrong?

Also, wildcards do not seem to be suported by the XPath grammar just yet.

Cheers,
Doru


On Mon, Dec 19, 2011 at 12:47 PM, Esteban Lorenzano <[hidden email]> wrote:


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Hi,


El 19/12/2011, a las 9:11a.m., Tudor Girba escribió:

> Thanks, Esteban.
>
> I gave it a try, but I cannot seem to make it work (and there are no tests :)).

yes... I know that :(
I will add them when I can spare some time... and a couple of examples too :P

>
> Here is an example of what I tried:
> xml := '<root>
> <topChild/>
> </root>'.
> element := PPXmlParser parse: xml.
> element find: 'root/topChild'

there is a "known" issue (known by me :( ):
PetitXPath is ignoring "document root element"... this is a stupid error and I will fix it (real reason is that when I coded it, I assumed "first element is always unique, so... let's get rid of it"... and yes I know it was a stupid assumption... but I needed this working really fast or my client would became upset)

So... if you do:

element find: '/topChild'

It should work... good thing is other ppl using this stuff encourages me to make it work as it should be :)

cheers,
Esteban
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