- To: =?utf-8?B?J0RhcmUgT2Jhc2Fuam8n?= <dareo@m...>, xml-dev@l...
- Subject: =?utf-8?B?UkU6IFt4bWwtZGV2XSBtYXRjaGluZyB0ZXh0IHdpdGggcmVnZXhw?==?utf-8?B?IGluIHhwYXRo?=
- From: =?utf-8?B?V2FubmhlZGVuLCBLbnV0?= <knut.wannheden@p...>
- Date: Thu, 8 Aug 2002 17:11:01 +0200
Title: RE: matching text with regexp in xpath
I wasn't going to make use of any XSLT engine at all. The intention is to use it as part of an XPath expression inside a XML processing Java application. Currently I don't even have to be able to use the function from inside a document, just in the processor. I'm using dom4j and Jaxen to process the XML document and run XPath queries.
I now have a first implementation of my function, although I still have a problem with the namespaces. I wasn't able to register the function with an associated namespace, just without namespace. But there must be some solution to that. Maybe someone can tell me how I can get that to work... This is what I'm doing now (without namespace):
XPathFunctionContext ctx = new XPathFunctionContext();
// myFunction implements org.jaxen.Function
ctx.registerFunction(null, "match", myFunction);
XPath xp = DocumentFactory.getInstance().
createXPath("/a/b[match(@c, '{.}')]");
xp.setFunctionContext(ctx);
List matches = xp.selectNodes(element);
If I use a namespace I get an InvalidXPathException when calling createXPath() even though I have it registered using DocumentFactory.setXPathNamespaceURIs().
--
knut
> -----Original Message-----
> From: Dare Obasanjo [mailto:dareo@m...]
> Sent: Donnerstag, 8. August 2002 16:58
> To: Wannheden, Knut; xml-dev@l...
> Subject: RE: matching text with regexp in xpath
>
>
> It depends on what XSLT processor you are using to determine
> what extension functions are available to you or embedded
> scripting options you have.
>
> -----Original Message-----
> From: Wannheden, Knut [mailto:knut.wannheden@p...]
> Sent: Thu 8/8/2002 2:32 AM
> To: xml-dev@l...
> Cc:
> Subject: matching text with regexp in xpath
>
>
>
> Hi,
>
> I was wondering if anybody knows of an extension
> function to XPath which allows me to match text and attribute
> values in XML documents against regular expressions. I'd
> like to be able to write something like:
>
> /a/b[re:match(@c, '{.}')]
>
> to match all elements where an attribute has a value
> matching the regexp {.} (AVT) or:
>
> /a/b/@c[re:match(., '{.}')]
>
> to match the attribute elements themselves.
>
> If there isn't such a thing yet I imagine it shouldn't
> be to hard to write. Can somebody give me some
> hints/directions on how to get started with this?
>
> Thanks,
>
> --
> knut
>
>
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