RE: [xsl] Hierearchy navigation in XSL

["McNally, David" <David.McNally@xxxxxxxxxx>]

Given the sample xml, I think this will do what you want:

<xsl:template match="/masterdoc">
  <xsl:variable name="thisns">
    <xsl:if test="$ns">
      <xsl:value-of select="concat($ns,'.')"/>
    </xsl:if>
  </xsl:variable>
  <xsl:for-each select="class[starts-with(@namespace,$ns)]">
    <xsl:variable name="nsafter"
select="substring-before(concat(substring-after(@namespace,$thisns),'.'),'.'
)"/>
    <xsl:if
test="not(preceding-sibling::class[starts-with(@namespace,concat($thisns,$ns
after))])">
      <xsl:value-of select="$nsafter"/>
    </xsl:if>
    <xsl:text>
    </xsl:text>
  </xsl:for-each>
</xsl:template>

HTH,
David.
--
David McNally            Moody's Investors Service
Software Engineer        99 Church St, NY NY 10007 
David.McNally@xxxxxxxxxx            (212) 553-7475 

> -----Original Message-----
> From: Scott Bronson [mailto:bronson@xxxxxxxxxxx]
> Sent: Monday, October 14, 2002 5:36 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Hierearchy navigation in XSL
> 
> 
> Hello.  I've solved most of this problem, but the last tiny bit has me
> stumped.  I'm hoping someone can tell me how to fix this.
> 
> Here's some input:
> 
> 
> <masterdoc>
>   <class name="Object"       namespace="System"/>
>   <class name="Array"        namespace="System"/>
>   <class name="ArrayList"    namespace="System.Collections"/>
>   <class name="Comparer"     namespace="System.Collections"/>
>   <class name="Grimey"       namespace="System.Collections.Overkill"/>
>   <class name="Formatter"    
> namespace="System.Runtime.Serialization"/>
>   <class name="ObjectHandle" namespace="System.Runtime.Remoting"/>
>   <class name="Garbage"      namespace="Other.SubAPI"/>
> </masterdoc>
> 
> 
> My script accepts a parameter that tells where it is in the 
> hierarchy. 
> It then outputs all immediate child nodes at that level in the
> hierarchy.
> 
> Some examples: if we're at "System", the script should output
> "Collections" and "Runtime".  If we're at "System.Collections", it
> should output "Overkill".  If we're at "", it should output 
> "System" and
> "Other".  If at "Other", output "SubAPI".  Seems a fairly 
> easy problem,
> right?
> 
> 
> 
> Here's my script right now:
> 
> 
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
> version="1.0">
> <xsl:output method="text"/>
> <xsl:param name="ns"/>
> <xsl:key name='uniq' match='class' use='@namespace'/>
> 
> <xsl:template match="/masterdoc">
>   <xsl:for-each
> select="class[generate-id()=generate-id(key('uniq',@namespace)[1])]">
>     <xsl:sort select="@namespace"/>
>     <xsl:choose>
>       <xsl:when test="string-length($ns)=0">
>         <xsl:value-of select="@namespace"/>
>       </xsl:when>
>       <xsl:when test="starts-with(@namespace,concat($ns,'.'))">
>         <xsl:value-of
> select="substring(@namespace,string-length($ns)+2)"/>
>       </xsl:when>
>     </xsl:choose>
> <xsl:text>
> </xsl:text>
>   </xsl:for-each>
> </xsl:template>
> 
> </xsl:stylesheet>
> 
> 
> 
> Here are some example runs of this script:
> 
> xalan -Q -XSL samp1.xsl -IN sample.xml -PARAM ns 
> "'System.Collections'"
> Overkill
> 
> xalan -Q -XSL samp1.xsl -IN sample.xml -PARAM ns "'System'"
> Collections
> Collections.Overkill
> Runtime.Remoting
> Runtime.Serialization
> 
> 
> The last one illustrates the problem.  It should have output only
> "Collections" and "Runtime".
> 
> I picture the algorithm being something like:
>    if(not(already copied string-before("Runtime.Remoting", "."))
>       then copy string-before("Runtime.Remoting", ".") to output
> 
> I've tried various combinations of preceding, preceding sibling, and
> position to try to figure out what I've already output.  I even tried
> key() and using IDs to navigate the parent.  All has resulted in
> frustration.
> 
> Does anyone have any idea of what I can do?  I'm out of ideas.
> 
> Thank you!
> 
>     - Scott
> 
> 
> 
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 


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