Re: [xsl] Building a bidirectional map of namespaces prefix to namespace from wsdl:definition

["Mukul Gandhi" <gandhi.mukul@xxxxxxxxx>]

Let's assume, we have some WSDL document to run the below stylesheet
(I tested with one of the examples available at,
http://www.w3.org/2001/03/14-annotated-WSDL-examples.html).

Below is a 1.0 stylesheet I could think of for this requirement:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                       xmlns:exslt="http://exslt.org/common";
                       version="1.0">

 <xsl:output method="text" />

 <xsl:template match="/*">
   <xsl:variable name="ns-map">
     <xsl:for-each select="namespace::*[not(name() = 'xml')]">
       <info>
         <prefix><xsl:value-of select="name()" /></prefix>
         <uri><xsl:value-of select="." /></uri>
       </info>
     </xsl:for-each>
   </xsl:variable>

   <!-- lookup example -->
   <xsl:variable name="key1" select="'es'" />
   <xsl:variable name="key2" select="'http://schemas.xmlsoap.org/wsdl/'" />

   <xsl:value-of select="exslt:node-set($ns-map)/info[prefix =
$key1]/uri" /><xsl:text>&#xa;</xsl:text>
   <xsl:value-of select="exslt:node-set($ns-map)/info[uri = $key2]/prefix" />
 </xsl:template>

</xsl:stylesheet>

I store the 'map' in a xsl:variable (a result tree fragment).

Please note, that this uses the node-set extension function to access
values from the 'map'.

This solution might look a bit complicated. But it might be necessary,
if you want the map to be stored somewhere, before accessing it.

Here is a simpler code, which directly accesses the properties of
namespace nodes:
(in this case the namespace nodes for the element could be considered
stored in a 'map')

<xsl:template match="/*">
  <xsl:value-of select="namespace::*[name() = 'es']"
/><xsl:text>&#xa;</xsl:text>
  <xsl:value-of select="name(namespace::*[. =
'http://schemas.xmlsoap.org/wsdl/'])" />
</xsl:template>

I have tested this with Xalan-J 2.7.1.

I hope that these examples would work with Xalan, bundled with JDK 5.
But I would recommend to use the latest Xalan version to have better
compliance and performance.


On Fri, Mar 21, 2008 at 8:47 PM, Farrukh Najmi
<farrukh@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Mukul Gandhi wrote:
>  > On Fri, Mar 21, 2008 at 7:08 AM, Farrukh Najmi
>  > <farrukh@xxxxxxxxxxxxxxxxxxxxx> wrote:
>  >
>  >>  I need to process a WSDL document via XSLT and build two maps from the
>  >>  namespace declaration in the wsdl:definition element.
>  >>
>  >>     * Key is the namespace prefix and value is the namespace
>  >>     * Key is the namespace and value is the prefix
>  >>
>  >
>  > This should be easy to do in XSLT (in 2.0 surely).
>
>  Does xalan in JDK 5 support XSLT 2.0? I do not believe so. For this
>  reason I would like an XSLT 1.0 based solution.
>
>
>  > When you say,
>  > "build two maps", then what kind of data structure in the stylesheet
>  > are you looking to store the maps?
>
>  Probably based on xslt:key ( <http://www.w3schools.com/xsl/el_key.asp>).
>
>
>  > Or probably, you can output two XML
>  > documents (or perhaps, text files), which contain the maps.
>  >
>
>  No I am looking for an in-memory solution that will be used within the
>  same stylesheet.
>
>
>  >
>  >>  Does anyone have an example of doing that or something similar that they
>  >>  can share along with a snippet that shows how to do a
>  >>  lookup of a value based on key.
>  >>
>  >
>  > When you say, "do a lookup of a value based on key", you need to
>  > clarify what data structure stores the map. If the maps are stored in
>  > external XML or text files, you can do a lookup based on normal XPath
>  > expressions.
>  >
>
>  No the maps have to be internal to style sheet. An examples is shown
>  here under lookup table 1.6:
>
>  <http://www.ibm.com/developerworks/library/ws-trans/listing1.html>
>
>
>  > If you could clarify on these aspects, we could try to solve the
>  > problem, or can give suitable pointers ...
>  >
>
>  Hopefully my needs are clearer now?
>
>
>
>  --
>  Regards,
>  Farrukh Najmi
>
>  Web: http://www.wellfleetsoftware.com


-- 
Regards,
Mukul Gandhi