[xsl] Re:Help needed in recursively converting the flat xml to a heirarchical XML...

["Sridhar Anupindi" <sridharanupindi@xxxxxxxxxxx>]

Hi Wendell,

I think I made a significant progress with your explanation. Thanks, But 
still I am stuck with some problems.

1. As you said, I tried replacing

<xsl:copy-of select="key('jname', $joinname)"/> with
<xsl:copy-of select="key('jname', $joinname)[1]"/> but the problem here 
since I loop thru each activity-state whether I use your solution or not it 
is copying multiple joins (coz each activity-state can have multiple 
transitions and each activity-state may refer to the same join).

2. As I  said there can be nested <concurrent-block> structures one inside 
the other. Though I am able to populate this structure with my code, the 
problem here I am facing is the internal <concurrent-block> is also being 
populated at the external level. The problem is I am using a for each select 
= "fork" at the template level which will loop through all the 
<concurrrent-block> structures in the original xml. But I am not able to 
figure out the solution.

3. The example I pasted here is fairly a simple one, which does not have 
multiple <activity-state> nodes inside a <concurrent-block>
  In this example the relation is
 <concurrent-block> ---> <activitiy-state>-----> <join>. Hence my code is 
working fine except the above two problems.
But I can have a possible scenario like
<concurrent-block>----> 
<activity-state>----><activity-state>----><decision>----><join>

My latest xsl code is :

<?xml version='1.0' encoding='UTF-8'?>
<xsl:stylesheet exclude-result-prefixes="fo ms" version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; xmlns:ms="urn:ms-xsl" 
xmlns:fo="http://www.w3.org/1999/XSL/Format";>
<xsl:output method="xml" encoding="UTF-8" indent="yes"/> <xsl:template 
match="/ |node()"><xsl:copy>
 <xsl:apply-templates select="@*|node()"/>
</xsl:copy></xsl:template>
<xsl:template match="@*">
<xsl:copy>
</xsl:copy>
</xsl:template>

<xsl:key name="act-name" 
match="/processXML/process-definition/activity-state" use="@name"/>
<xsl:key name="act-name" match="/processXML/process-definition/decision" 
use="@name"/>
<xsl:key name="jname" match="/processXML/process-definition/join" 
use="@name"/>
<xsl:key name="con-name" 
match="/processXML/process-definition/concurrent-block" use="fork/@name"/>

<xsl:key name="forktransitions" 
match="/processXML/process-definition/concurrent-block/fork/transition" 
use="@to"/>
<xsl:template match="activity-state[(key('forktransitions',@name))]"/>
<xsl:template match="join" />


<xsl:template name = "template1"  
match="/processXML/process-definition/concurrent-block">
<xsl:copy>
<!-- To Copy  Concurrent-Blocks -->
<xsl:for-each select="fork">
	<xsl:variable name="forkname" select="@name"/>
	<xsl:apply-templates 
select="/processXML/process-definition/concurrent-block/fork[@name=$forkname]"/>
	<xsl:for-each select="transition">
		<xsl:variable name="transname"><xsl:value-of select="@to"/></xsl:variable>
	  	<xsl:copy-of select="key('act-name', $transname)"/>
		<xsl:for-each select="key('act-name', $transname)">
			<xsl:variable name="joinname" select="transition/@to"/>
			<xsl:copy-of select="key('jname', $joinname)"/>
			<xsl:for-each select="key('act-name', $joinname)">
				<xsl:copy-of select="key('act-name', $joinname)"/>
			</xsl:for-each>
			<xsl:for-each select="key('con-name', $joinname)">
				<xsl:call-template name="template1"  />
			</xsl:for-each>
		</xsl:for-each>
	</xsl:for-each>
</xsl:for-each>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>

Thanks

Sridhar Anupindi

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