Re: [xsl] copying complete document, but sort specific childnodes

[Martin Honnen <Martin.Honnen@xxxxxx>]

Marc Harding | marcharding.de wrote:

> my source document:
>
> <document>
> 	<group id="group_abc123">
> 		<item id="123456" sort-order="2">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 		<item id="123456" sort-order="1">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>	
> 		<item id="123456" sort-order="3">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 		<group id="group_def123">
> 			<item id="123456" sort-order="2">
> 				<childitem id="bar">foo</childitem>
> 				<childitem id="text">1</childitem>
> 			</item>
> 			<item id="123456" sort-order="1">
> 				<childitem id="bar">foo</childitem>
> 				<childitem id="text">1</childitem>
> 			</item>	
> 			<item id="123456" sort-order="3">
> 				<childitem id="bar">foo</childitem>
> 				<childitem id="text">1</childitem>
> 			</item>
> 			<item id="123456" sort-order="4">
> 				<childitem id="bar">foo</childitem>
> 				<childitem id="text">1</childitem>
> 			</item>
> 		</group>	
> 		<item id="123456" sort-order="4">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 	</group>
> 	<group id="group_abc456">
> 		<item id="123456" sort-order="2">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 		<item id="123456" sort-order="1">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>	
> 		<item id="123456" sort-order="3">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 		<item id="123456" sort-order="4">
> 			<childitem id="bar">foo</childitem>
> 			<childitem id="text">1</childitem>
> 		</item>
> 	</group>
> </document>

> expected result:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <document>
>   <group id="group_abc123">
>       <item id="123456" sort-order="1">
>         <childitem id="bar">foo</childitem>
>         <childitem id="text">1</childitem>
>       </item>
>       <item id="123456" sort-order="2">
>         <childitem id="bar">foo</childitem>
>         <childitem id="text">1</childitem>
>       </item>
>       <item id="123456" sort-order="3">
>         <childitem id="bar">foo</childitem>
>         <childitem id="text">1</childitem>
>       </item>
>       <group id="group_def123">
>          <item id="123456" sort-order="1">
>            <childitem id="bar">foo</childitem>
>            <childitem id="text">1</childitem>
>          </item>
>          <item id="123456" sort-order="2">
>            <childitem id="bar">foo</childitem>
>            <childitem id="text">1</childitem>
>          </item>
>          <item id="123456" sort-order="3">
>            <childitem id="bar">foo</childitem>
>            <childitem id="text">1</childitem>
>          </item>
>          <item id="123456" sort-order="4">
>            <childitem id="bar">foo</childitem>
>            <childitem id="text">1</childitem>
>          </item>
>      </group>
>       <item id="123456" sort-order="4">
>         <childitem id="bar">foo</childitem>
>         <childitem id="text">1</childitem>
>       </item>
>   </group>
>   <group id="group_abc456">
>     <item id="123456" sort-order="1">
>       <childitem id="bar">foo</childitem>
>       <childitem id="text">1</childitem>
>     </item>
>     <item id="123456" sort-order="2">
>       <childitem id="bar">foo</childitem>
>       <childitem id="text">1</childitem>
>     </item>
>     <item id="123456" sort-order="3">
>       <childitem id="bar">foo</childitem>
>       <childitem id="text">1</childitem>
>     </item>
>     <item id="123456" sort-order="4">
>       <childitem id="bar">foo</childitem>
>       <childitem id="text">1</childitem>
>     </item>
>   </group>
> </document>

I realize you probably want an XSLT 1.0 solution as you posted an XSLT 
1.0 stylesheet but as I am currently not sure there is a straightforward 
1.0 solution here is an XSLT 2.0 solution:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  version="2.0">

  <xsl:output indent="yes"/>
  <xsl:strip-space elements="*"/>

  <xsl:template match="@* | node()">
    <xsl:copy>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="group">
    <xsl:copy>
      <xsl:apply-templates select="@*"/>
      <xsl:for-each-group select="*" group-adjacent="exists(@sort-order)">
        <xsl:choose>
          <xsl:when test="current-grouping-key()">
            <xsl:apply-templates select="current-group()">
              <xsl:sort select="@sort-order" data-type="number"/>
            </xsl:apply-templates>
          </xsl:when>
          <xsl:otherwise>
            <xsl:apply-templates select="current-group()"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:for-each-group>
    </xsl:copy>
  </xsl:template>

</xsl:stylesheet>

For above cited input it produces above cited output.


--

	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/