[xsl] Re: How to implement Divide and Conquer Algo on this template !! Getting Callstack overflow error

["Dimitre Novatchev" <dnovatchev@xxxxxxxxx>]

> The is regarding Callstack overflow error.
>
> Dimitrie suggested to implement Divide and Conquer Solution to avoid such
a
> problem.
>
> I saw his example at this site.
> http://www.topxml.com/code/default.asp?p=3&id=v20020107050418
>
>
> How do i write DVC algorithm for the following Call-Template. Here I am
having
> data also in the parameter. And my input file is going to be in GBs and
every
> time the "names" param in the following snippet is going to huge number
atlest
> more than 1000 as there are 10 attributes in each node and there will be
1000
> or more nodes like that.
>
> I am trying to get unique attribute names for say node "SecondNode" which
can
> repeat any number of times.

Do not try to use such kind of algorithm for obtaining unique attribute
names because it is inefficient.

Read about grouping methods here:

    http://www.topxml.com/code/default.asp?p=3&id=v20010129150851

and here:

    http://jenitennison.com/xslt/grouping/index.html


Here's an example how to use the Muenchian method for grouping in order to
obtain the unique attributes' names:


<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>

  <xsl:output method="text"/>

  <xsl:key name="kattNames"
   match="firstNode/secondNode/@*" use="name()"/>

  <xsl:template match="/">
    <xsl:for-each
     select="*/*/*/@*[generate-id()
                     =
                      generate-id(key('kattNames', name())[1])
                     ]">
       <xsl:value-of select="concat(name(), '&#xA;')"/>
     </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

When this transformation is applied on the source.xml below:

<root>
  <firstNode>
    <secondNode a="x" b="y" c ="z"/>
    <secondNode a="x" m="y" c ="z"/>
  </firstNode>
  <firstNode>
    <secondNode a="x" X="y" c ="z"/>
    <secondNode a="x" m="y" c ="z"/>
  </firstNode>
  <firstNode>
    <secondNode Y="x" b="y" c ="z"/>
    <secondNode a="x" m="y" Z ="z"/>
  </firstNode>
</root>

the correct result is produced:

a
b
c
m
X
Y
Z


Hope this helped.


=====
Cheers,

Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL




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