On Wed, 7 Aug 2002 16:27:02 +0200
"Jeroen Breedveld" <[EMAIL PROTECTED]> wrote:
> | Oh,
> |
> | Why this code ?
> |
> | System.setProperty
> | ("org.infozone.tools.xml.queries.XPathQueryFactory",
> | "org.infozone.tools.xml.queries.xalan2.XPathQueryFactoryImpl");
> |
> | 1. It only set up XPath, not XUpdate ! Right ?
>
> This code is used to tell Lexus which XPathQueryFactory it has to use to
> select the nodes in XUpdate queries. By default this is Xalan so if you
> use that you don't have to set anything. If you supply Lexus with
> another DOM implementation document you (may) have to supply your own
> XPathQueryFactory, for example if Lexus is used with X-Hive/DB you do
> this:
>
>
> System.setProperty("org.infozone.tools.xml.queries.XPathQueryFactory",
> "com.xhive.xupdate.XhiveXPathQueryFactory");
>
> | 2. Does this version of XPath is better than the Xalan one ?
>
> There's probably no difference because it is a wrapper around the
> Xalan's XPathQueryFactory, but there are probably other people on this
> list that can answer this question better...
Absolutely right, Jeroen.
As far as we don't have a common XPath factory (JAXP or something similar)
we need a way to make the used XPath implementation pluggable. The package
infozone.tools simply provides such a factory for XPath implementations
like JAXP provides factories for SAXParser, DocumentBuilder etc. But this
package doesn't contain any XPath/XUpdate implementation specific stuff.
Lars.
--
______________________________________________________________________
Lars Martin mailto:[EMAIL PROTECTED]
SMB GmbH http://www.smb-tec.com
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