xml - XSLT sort parent nodes based on maximum child node -


i've looked through existing articles xslt sorting, still can't figure out proper decision sorting case. need sort child nodes firstly (descending order) , sort parent nodes (descending order) based on first (maximum) child value.

so, need final order name3, name1, name2, have name1, name3, name2.

could please find solution. in advance!

input xml:

<collection> <products>     <product>         <productcode>001</productcode>         <productname>name1</productname>         <subproducts>             <subproduct>                 <prices>                     <price>                         <totalprice>264.28</totalprice>                     </price>                                     </prices>             </subproduct>             <subproduct>                 <prices>                     <price>                         <totalprice>264.28</totalprice>                     </price>                 </prices>             </subproduct>                                        </subproducts>     </product>     <product>         <productcode>002</productcode>         <productname>name2</productname>         <subproducts>             <subproduct>                 <prices>                     <price>                         <totalprice>231.99</totalprice>                     </price>                     <price>                         <totalprice>231.99</totalprice>                     </price>                 </prices>             </subproduct>             <subproduct>                 <prices>                     <price>                         <totalprice>231.99</totalprice>                     </price>                     <price>                         <totalprice>231.99</totalprice>                     </price>                 </prices>             </subproduct>                                    </subproducts>     </product>     <product>         <productcode>003</productcode>         <productname>name3</productname>         <subproducts>             <subproduct>                 <prices>                     <price>                         <totalprice>234.92</totalprice>                     </price>                 </prices>             </subproduct>                <subproduct>                 <prices>                     <price>                         <totalprice>734.12</totalprice>                     </price>                                     </prices>             </subproduct>                                    </subproducts>     </product>           </products> </collection>

output xml: (expected)

<products> <product>     <productname>name3</productname>     <price>734.12</price>     <price>234.92</price> </product> <product>     <productname>name1</productname>     <price>264.28</price>     <price>264.28</price> </product> <product>     <productname>name2</productname>     <price>231.99</price>     <price>231.99</price>     <price>231.99</price>     <price>231.99</price> </product> </products>

xslt transformation:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform"> <xsl:template match="/">     <xsl:copy>         <xsl:apply-templates select="/collection/products/product">              <xsl:sort select="subproducts/subproduct[1]/prices/price[1]/totalprice" data-type="number" order="descending"/>                      </xsl:apply-templates>               </xsl:copy> </xsl:template>  <xsl:template match="/collection/products/product">          <xsl:copy>                   <productname>             <xsl:value-of select="productname"/>         </productname>                   <xsl:apply-templates select="subproducts/subproduct/prices/price">             <xsl:sort select="totalprice" order="descending" data-type="number"/>         </xsl:apply-templates>               </xsl:copy> </xsl:template>  <xsl:template match="subproducts/subproduct/prices/price">     <xsl:copy>         <xsl:value-of select="totalprice"/>     </xsl:copy> </xsl:template> </xsl:stylesheet>

wrong xml output:

 <products> <product>     <productname>name1</productname>     <price>264.28</price>     <price>264.28</price> </product> <product>     <productname>name3</productname>     <price>734.12</price>     <price>234.92</price> </product> <product>     <productname>name2</productname>     <price>231.99</price>     <price>231.99</price>     <price>231.99</price>     <price>231.99</price> </product> </products>

if you're using xalan processor, can take advantage of exslt math:max() extension function:

xslt 1.0 

<xsl:stylesheet version="1.0"  xmlns:xsl="http://www.w3.org/1999/xsl/transform" xmlns:math="http://exslt.org/math" extension-element-prefixes="math"> <xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/> <xsl:strip-space elements="*"/>  <xsl:template match="/">     <products>         <xsl:apply-templates select="collection/products/product">              <xsl:sort select="math:max(subproducts/subproduct/prices/price/totalprice)" data-type="number" order="descending"/>                      </xsl:apply-templates>               </products> </xsl:template>  <xsl:template match="product">          <xsl:copy>                   <xsl:copy-of select="productname"/>         <xsl:apply-templates select="subproducts/subproduct/prices/price">             <xsl:sort select="totalprice" data-type="number" order="descending"/>         </xsl:apply-templates>               </xsl:copy> </xsl:template>  <xsl:template match="price">     <xsl:copy>         <xsl:value-of select="totalprice"/>     </xsl:copy> </xsl:template>  </xsl:stylesheet>

demo: http://xsltransform.net/3mvmrzh/1


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