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Dude PetrovichSubject: Recursive XSLT Templates
Author: Dude Petrovich
Date: 05 Oct 2007 09:07 AM
I got stuck implementing XSLT to convert from flat structure like this

<nodes>
<node parentNode="ROOT" parentNodeValue="ROOT" NodeName="DIVISION" NodeValue="1">ABC</node>
<node parentNode="DIVISION" parentNodeValue="1" NodeName="REGION" NodeValue="11">REGION OF ABC</node>
<node parentNode="REGION" parentNodeValue="11" NodeName="DISTRICT" NodeValue="11a">DISTRICT OF REGION OF ABC</node>
</nodes>

to something like this:
<nodes>
<DIVISION NodeValue="1">ABC
<REGION NodeValue="11">REGION OF ABC
<DISTRICT NodeValue="11a">DISTRICT OF REGION OF ABC</DISTRICT>
<DISTRICT..................../>
</REGION>
<REGION ............/>
</DIVISION>
</nodes>

i am working on a generic recursive conversion, as my INPUT XML may have unlimited levels of parent/child relationships, and names (FIELDNAMES) can also be different.
But each node always will have this:
FieldName
FieldValue
ParentFieldName
ParentFieldValue


thanks in advance


I am using Stylus 2007 Studio (eval), trying to figure it out.
I looked trought the examples and searched the forums, but did not find anything similar.

Any help would be appritiated. Maybe i just need to be pointed to the right direction.

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Alberto MassariSubject: Recursive XSLT Templates
Author: Alberto Massari
Date: 05 Oct 2007 12:20 PM
This should work for you:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<nodes>
<xsl:apply-templates select="nodes/node[@parentNode='ROOT']"/>
</nodes>
</xsl:template>

<xsl:template match="node">
<xsl:element name="{@NodeName}">
<xsl:attribute name="NodeValue"><xsl:value-of select="@NodeValue"/></xsl:attribute>
<xsl:value-of select="text()"/>
<xsl:apply-templates select="/nodes/node[@parentNode=current()/@NodeName and @parentNodeValue=current()/@NodeValue]"/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>

Hope this helps,
Alberto

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Dude PetrovichSubject: Recursive XSLT Templates
Author: Dude Petrovich
Date: 05 Oct 2007 02:33 PM
Thanks Alberto, but this does not really makes a recursive calls.
I am trying to get a recursive functionality where node is sent and it would check/match if the current node has children, if so it would add them to the current node, etc.

Postnext
Alberto MassariSubject: Recursive XSLT Templates
Author: Alberto Massari
Date: 05 Oct 2007 02:44 PM
Hi Dude,
recursion in XSLT is done with xsl:apply-templates, and my code does actually build the tree by looking for the nodes that have the current one as parent (that, in turn, explore their own children). Have you tried the code with your data?

Alberto

Postnext
Dude PetrovichSubject: Recursive XSLT Templates
Author: Dude Petrovich
Date: 05 Oct 2007 04:54 PM
Thanks Alberto, but this does not really makes a recursive calls.
I am trying to get a recursive functionality where node is sent and it would check/match if the current node has children, if so it would add them to the current node, etc.

Postnext
Dude PetrovichSubject: Recursive XSLT Templates
Author: Dude Petrovich
Date: 08 Oct 2007 10:15 AM
Thanks Alberto, but this does not really makes a recursive calls.
I am trying to get a recursive functionality where node is sent and it would check/match if the current node has children, if so it would add them to the current node, etc.

Posttop
James DurningSubject: Recursive XSLT Templates
Author: James Durning
Date: 05 Oct 2007 03:07 PM
Originally Posted: 05 Oct 2007 03:05 PM
I suggest trying something like this to start.
This assumes that no node has the same nodeName and nodeValue.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:template match="/*">
<xsl:copy>
<xsl:apply-templates select="node[@parentNode='ROOT']"/>
</xsl:copy>
</xsl:template>
<xsl:template match="node">
<xsl:variable name="name" select="@NodeName"/>
<xsl:variable name="value" select="@NodeValue"/>
<xsl:element name="{@NodeName}">
<xsl:copy-of select="@NodeValue"/>
<xsl:copy-of select="text()"/>
<xsl:apply-templates select="following-sibling::node[@parentNode = $name][preceding-sibling::node[@NodeName=$name][@NodeValue = $value]]"/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>

-- edit. forgot to hit post button yesterday. Apparently a similar answer has already been provided.

 
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