Question

I am having some issues with consuming an XML and applying multiple conditions on it. I have an input XML that looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<results xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ResultsType">
    <result>
        <resultSets>
            <resultSet>
                <row>
                    <column1>11111</column1>
                    <column2>0</column2>
                    <column3>imageId/111111</column3>
                    <column4>2012-04-03T10:11:22.187</column4>
                </row>
                <row>
                    <column1>11111</column1>
                    <column2>2</column2>
                    <column3>imageId/111112</column3>
                    <column4>2012-04-03T10:11:22.187</column4>
                </row>
                <row>
                    <column1>11111</column1>
                    <column2>2</column2>
                    <column3>imageId/111113</column3>
                    <column4>2012-04-03T10:11:22.187</column4>
                </row>
                <row>
                    <column1>22222</column1>
                    <column2>0</column2>
                    <column3>imageId/222222</column3>
                    <column4>2012-04-03T10:11:22.187</column4>
                </row>
                <row>
                    <column1>22222</column1>
                    <column2>2</column2>
                    <column3>imageId/222223</column3>
                    <column4>2012-04-03T10:11:22.187</column4>
                </row>
            </resultSet>
        </resultSets>
    </result>
</results>

However i would like it to look like this:

<?xml version="1.0" encoding="UTF-8"?>
<results xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ResultsType">
    <result>
        <row>
            <id>11111</id>
            <lagrgeImage>imageId/111111</lagrgeImage>
            <smallImage>imageId/111112</smallImage>
            <smallImage>imageId/111113</smallImage>
        </row>
        <row>
            <id>22222</id>
            <lagrgeImage>imageId/222222</lagrgeImage>
            <smallImage>imageId/222223</smallImage>
        </row>
    </result>
</results>

As you can see there are two filtering condition:

If column2 = 0 then largeImage tag is needed in the output however column2 = 2 then smallImage tag is needed in the output.

UPDATE

Both of the examples below worked perfectly, however they are both including namespacing in the root that are unexpected. The output i get is:

<?xml version="1.0" encoding="utf-8"?>
<results xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ResultsType">
    <result>
        <row>
            <id>11111</id>
            <largeImage>imageId/111111</largeImage>
            <smallImage>imageId/111112</smallImage>
            <smallImage>imageId/111113</smallImage>
        </row>
        <row>
            <id>22222</id>
            <largeImage>imageId/222222</largeImage>
            <smallImage>imageId/222223</smallImage>
        </row>
    </result>
</results>

How do i remove xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ResultsType" from the above output?

Answer 1

If you are using XSLT2.0 you make use of the for-each-group function.

<xsl:for-each-group select="row" group-by="column1">

Assuming your context is resultSets this would group the rows by the ‘id’ in column1. The current grouping key could then be obtained as follows:

<xsl:value-of select="current-grouping-key()"/>

And to get the various rows in the group, to transform them to either largeImage or smallImage, you would do this

<xsl:apply-templates select="current-group()" />

Here is the full XSLT

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

   <xsl:output method="xml" indent="yes"/>

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

   <xsl:template match="resultSet">
      <xsl:apply-templates select="@*"/>
      <xsl:for-each-group select="row" group-by="column1">
         <row>
            <id><xsl:value-of select="current-grouping-key()"/></id>
            <xsl:apply-templates select="current-group()" />
          </row>
      </xsl:for-each-group>
   </xsl:template>

   <xsl:template match="row[column2='0']">
      <largeImage><xsl:value-of select="column3" /></largeImage>
   </xsl:template>

   <xsl:template match="row">
      <smallImage><xsl:value-of select="column3" /></smallImage>
   </xsl:template>

   <xsl:template match="@*|node()[not(self::*)]">
      <xsl:copy> 
         <xsl:apply-templates select="@*|node()"/>
      </xsl:copy>
   </xsl:template>

   <xsl:template match="*">
      <xsl:element name="{local-name()}"> 
         <xsl:apply-templates select="@*|node()"/>
      </xsl:element>
   </xsl:template>
</xsl:stylesheet>

When applied to your sample XML, the following is output

<results xmlns="http://www.castiron.com//response">
   <result>
      <row>
         <id>11111</id>
         <largeImage>imageId/111111</largeImage>
         <smallImage>imageId/111112</smallImage>
         <smallImage>imageId/111113</smallImage>
      </row>
      <row>
         <id>22222</id>
         <largeImage>imageId/222222</largeImage>
         <smallImage>imageId/222223</smallImage>
      </row>
   </result>
</results>