On 1/11/07, James Fuller <jim(_dot_)fuller(_at_)ruminate(_dot_)co(_dot_)uk>
wrote:
Hello All,
Can anyone propose a pure xslt (1 or 2) solution to transforming the
following flat xml structure of directory paths into a hierarchical
(nested) xml.
<?xml version='1.0'?>
<listing>
<item>cn/test.xml</item>
<item>en</item>
<item>en/test.html</item>
<item>en/test1.html</item>
<item>en/resource</item>
<item>en/resource/style</item>
<item>en/resource/style/test.css</item>
<item>favicon.ico</item>
<item>cn</item>
</listing>
to
<dir>
<file name="favicon.ico"/>
<dir name="cn">
<file name="test.xml"/>
</dir>
<dir name="en">
<file name="test.html"/>
<file name="test1.html"/>
<dir name="resource">
<dir name="style">
<file name="test.css"/>
</dir>
</dir>
</dir>
</dir>
...trickier than it first looks :)
This should do the job:
<xsl:stylesheet version="2.0"
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
exclude-result-prefixes="xs">
<xsl:template match="listing">
<dir>
<xsl:call-template name="process">
<xsl:with-param name="depth" select="1"
as="xs:integer"/>
<xsl:with-param name="seq" select="item"/>
</xsl:call-template>
</dir>
</xsl:template>
<xsl:template name="process">
<xsl:param name="depth" as="xs:integer"/>
<xsl:param name="seq"/>
<xsl:for-each-group select="$seq" group-by="tokenize(., '/')[$depth]">
<xsl:variable name="part" select="tokenize(., '/')[$depth]"/>
<xsl:choose>
<xsl:when test="contains($part, '.')">
<file name="{$part}"/>
</xsl:when>
<xsl:otherwise>
<dir name="{$part}">
<xsl:call-template name="process">
<xsl:with-param name="depth"
select="$depth + 1"/>
<xsl:with-param name="seq"
select="$seq[tokenize(., '/')[$depth]
= $part]"/>
</xsl:call-template>
</dir>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:template>
</xsl:stylesheet>
The output is:
<dir>
<dir name="cn">
<file name="test.xml"/>
</dir>
<dir name="en">
<file name="test.html"/>
<file name="test1.html"/>
<dir name="resource">
<dir name="style">
<file name="test.css"/>
</dir>
</dir>
</dir>
<file name="favicon.ico"/>
</dir>
cheers
andrew
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