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saffrons saffronsSubject: help me implement the following in xslt
Author: saffrons saffrons
Date: 12 Sep 2005 04:38 AM
This is my requirement,

the input xml will be in this format,

<root>
<name>1</name>
<name>2</name>
<name>3</name>
<name>1</name>
<name>2</name>
<name>1</name>
</root>

The possible values for name are only 1,2 and 3. I should supply an xsl which will be used to transform this xml into another xml in the following format,

<root>
<Loop>
<name>1</name>
<Loop>
<name>2</name>
<Loop>
<name>3</name>
</Loop>
</Loop>
</Loop>
<Loop>
<name>1</name>
<Loop>
<name>2<name>
</Loop>
</Loop>
<Loop>
<name>1</name>
</Loop>
</root>

In the input xml, there will not be a 2 without 1 preceding it. similarly there wont be a 3 without a 2 preceding it. But there could be more than one 2, one after the other. Here's another example,

<root>
<name>1</name>
<name>2</name>
<name>2</name>
</root>

Here the output will be
<root>
<Loop>
<name>1</name>
<Loop>
<name>2</name>
</Loop>
<Loop>
<name>2</name>
</Loop>
</Loop>
</root>

I thought of using the following algorithm to determine when to open a loop element and when to close a loop,

declare variables L1 = no, L2 = no and L3 = no
For each <root> in output xml
{
If (name = 1)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
If (L2 = yes) then in output xml, close loop "</Loop>"
If (L1 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
If (name = 2)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
If (L2 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
If (name = 3)
{
If (L3 = yes) then in output xml, close loop "</Loop>"
Open Loop in output xml "<Loop>"
}
}

But here, since variable values once assigned cannot be reassigned, I am not able to implement this algo. in xsl. Help me with some other logic that will be able to achieve the same. (all I want here is to do the following, there will be an input xml file where all elements are in the same level. In the output file, I want these elements nested one inside another, based on their values.)

Postnext
(Deleted User) Subject: help me implement the following in xslt
Author: (Deleted User)
Date: 12 Sep 2005 05:56 AM
Hi Saffrons,
this is a possible solution:

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

<xsl:template match="/">
<root>
<xsl:apply-templates select="root/name[. = '1']"/>
</root>
</xsl:template>


<xsl:template match="name">
<xsl:variable name="myIndex" select="number(.)"/>
<xsl:variable name="nextIndex" select="number(.)+1"/>
<Loop>
<xsl:copy-of select="."/>
<xsl:apply-templates select="following-sibling::name[1][. = $nextIndex]"/>
</Loop>
<xsl:if test="$myIndex != 1">
<xsl:apply-templates select="following-sibling::name[1][. = $myIndex]"/>
</xsl:if>
</xsl:template>

</xsl:stylesheet>

Hope this helps,
Alberto

Postnext
saffrons saffronsSubject: help me implement the following in xslt
Author: saffrons saffrons
Date: 12 Sep 2005 06:29 AM
hi alberto,
thank you and that worked fine. but is there any other solution in case i have multiple values that might start a specific level loop? eg., not only '1' but values 'one','first','top' and 'high' are all equivalent. Similarly '2','two','second' are equivalent. '3','three','third' are equivalent. the i/p file might be like
<root>
<name>one</name>
<name>2</name>
<name>third</name>
</root>
now the o/p shud be like,
<root>
<Loop>
<name>one</name>
<Loop>
<name>2</name>
<Loop>
<name>third</name>
</Loop>
</Loop>
</Loop>
</root>

-saffrons

Posttop
(Deleted User) Subject: help me implement the following in xslt
Author: (Deleted User)
Date: 12 Sep 2005 08:16 AM
Hi Saffrons,
a more elegant solution could be done using XSLT 2, but this should work too, given the small amount of choices:

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

<xsl:template match="/">
<root>
<xsl:apply-templates select="root/name[. = '1' or . = 'first' or . = 'one']"/>
</root>
</xsl:template>


<xsl:template match="name[. = '1' or . = 'first' or . = 'one']">
<Loop>
<xsl:copy-of select="."/>
<xsl:apply-templates select="following-sibling::name[1][. = '2' or . = 'second' or . = 'two']"/>
</Loop>
</xsl:template>

<xsl:template match="name[. = '2' or . = 'second' or . = 'two']">
<Loop>
<xsl:copy-of select="."/>
<xsl:apply-templates select="following-sibling::name[1][. = '3' or . = 'third' or . = 'three']"/>
</Loop>
<xsl:apply-templates select="following-sibling::name[1][. = '2' or . = 'second' or . = 'two']"/>
</xsl:template>

<xsl:template match="name[. = '3' or . = 'third' or . = 'three']">
<Loop>
<xsl:copy-of select="."/>
</Loop>
<xsl:apply-templates select="following-sibling::name[1][. = '3' or . = 'third' or . = 'three']"/>
</xsl:template>

</xsl:stylesheet>

Hope this helps,
Alberto

   
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