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List:       xml-cocoon-dev
Subject:    Re: [c2 proposal] map:aggregate
From:       Michael Hartle <mhartle () hartle-klug ! com>
Date:       2001-07-28 22:17:57
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Vadim Gritsenko wrote:

>>But - hopefully - we have other solution: X/Cinclude mechanism
>>which is perfectly suitable in this case:
>>
>><map:match pattern="documents_pdf/documentation.pdf">
>>  <map:generate type="directory" src="docs/xdocs"/>
>>  <map:transform src="filter-xml-files.xsl"/>
>>  <map:transform src="xml-file-to-xinclude.xsl"/>
>>  <map:transform type="xinclude"/>
>>  <!-- here you have all xdocs in one stream -->
>>  ....
>></map:match>
>>
This way worked perfectly for aggregating XML news articles in a 
directory subtree, I used

   <map:match pattern="collection/news-overview.xml">
    <map:generate type="directory" src="repository/news/current">
     <map:parameter name="root" value="repository"/>
     <map:parameter name="depth" value="2"/>
    </map:generate>
    <map:transform src="stylesheets/directory-to-xinclude.xsl"/>
    <map:transform type="xinclude"/>
    <map:serialize type="xml"/>
   </map:match>

for generating a collection document containing all current news in the 
repository which in turn can then be aggregated to the pages in need for 
news. I attached the directory-to-xinclude.xsl I wrote; a drawback of 
this solution is that the DirectoryGenerator does not provide caching of 
its results.

Best regards,

Michael


["directory-to-xinclude.xsl" (text/xml)]

<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" \
xmlns:dir="http://apache.org/cocoon/directory/2.0" \
xmlns:xinclude="http://www.w3.org/1999/XML/xinclude" \
xmlns:java="http://xml.apache.org/xslt/java" exclude-result-prefixes="dir java">

<xsl:template match="/">
  <news-collection>
  <xsl:apply-templates/>
  </news-collection>
</xsl:template>

<xsl:template match="dir:directory">
  <!-- get the path parameter -->
  <xsl:param name="path"/>

  <!-- add @name attribute to path parameter -->
  <xsl:variable name="addedPath"><xsl:value-of select="$path"/><xsl:value-of \
select="@name"/>/</xsl:variable>

  <!-- pass path parameter on to all directory entries -->
  <xsl:apply-templates select="dir:directory">
    <xsl:with-param name="path"><xsl:value-of select="$addedPath"/></xsl:with-param>
  </xsl:apply-templates>

  <!-- pass path parameter on to all file entries -->
  <xsl:apply-templates select="dir:file">
    <xsl:with-param name="path"><xsl:value-of select="$addedPath"/></xsl:with-param>
  </xsl:apply-templates>

</xsl:template>

<xsl:template match="dir:file">
  <!-- grab "path" parameter -->
  <xsl:param name="path"/>

  <!-- generate XInclude-statements -->
  <xinclude:include parse="xml"><xsl:attribute name="href">file:<xsl:value-of \
select="$path"/><xsl:value-of select="@name"/></xsl:attribute></xinclude:include> \
</xsl:template>


</xsl:stylesheet>



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