XSLT combine multiple nodes into single node

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無奈伤痛
無奈伤痛 2021-01-06 09:43

 
  Sydney Office
  SYDNEY
  

        
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  • 2021-01-06 09:59

    Here's an answer similar to Dimitre's. I'd already written it, so I thought I'd go ahead and post it...

    XSLT (2.0)

    <?xml version="1.0" encoding="UTF-8"?>
    <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
      <xsl:output indent="yes"/>
      <xsl:strip-space elements="*"/>
    
      <xsl:template match="node()|@*">
        <xsl:choose>
          <xsl:when test="starts-with(local-name(), 'W_') and ends-with(local-name(), '_Dlr')">
            <xsl:variable name="period" select="substring(local-name(),3,8)"/>
            <Expenditure>
              <Period><xsl:value-of select="$period"/></Period>
              <Value><xsl:apply-templates/></Value>
              <Spots><xsl:value-of select="following-sibling::*[starts-with(local-name(), 'W_') and ends-with(local-name(),concat($period,'_Spots'))]"/></Spots>
            </Expenditure>
          </xsl:when>
          <xsl:when test="ends-with(local-name(), '_Spots')"/>
          <xsl:otherwise>
            <xsl:copy>
              <xsl:apply-templates select="node()|@*"/>
            </xsl:copy>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:template>
    
    </xsl:stylesheet>
    

    Also, if you're using XSLT 2.0 (I assumed you were since you used ends-with()) you can use tokenize() to capture pieces of the name.

    Example:

    <xsl:variable name="period" select="tokenize(local-name(),'_')[2]"/>
    
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  • 2021-01-06 10:09

    I would start with a template like

    <xsl:template match="Row/*[starts-with(name(), 'W_') and
                               ends-with(name(), '_Dlr')]">
    

    which should more precisely match the element you want matched. As to how to select the adjacent <W_${DATE}_Spots> sibling element... why not use the following-sibling XPath axis with the proper string?

    <xsl:template match="Row/*[starts-with(local-name(), 'W_') and
                               ends-with(local-name(), '_Dlr')]">
      <xsl:variable name="date" select="substring(local_name(),3,8)"/>
      ...
      <xsl:apply-templates select="following-sibling::*[local-name() ==
                                   concat('W_', concat($date, '_Spots'))]"/>
      ...
    </xsl:template>
    
    <xsl:template match="Row/*[starts-with(local-name(), 'W_') and
                              ends-with(local-name(), '_Spots')]">
      <xsl:variable name="date" select="substring(local_name(),3,8)"/>
      ...
    </xsl:template>
    

    BTW, this looks like an endless loop waiting to happen:

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

    I am sure there are a few mistakes in my answer, but it should be helpful in some capacity anyway.

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  • 2021-01-06 10:18

    This transformation:

    <xsl:stylesheet version="1.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
     <xsl:output omit-xml-declaration="yes" indent="yes"/>
     <xsl:strip-space elements="*"/>
    
     <xsl:template match="node()|@*">
         <xsl:copy>
           <xsl:apply-templates select="node()|@*"/>
         </xsl:copy>
     </xsl:template>
    
     <xsl:template match=
     "*[starts-with(name(),'W_')
      and
       substring-after(substring-after(name(),'_'),'_')='Dlr'
      and
       text()
       ]">
      <Expenditure>
        <Period>
          <xsl:value-of select="substring(name(),3,8)"/>
        </Period>
        <Value>
          <xsl:apply-templates/>
        </Value>
          <xsl:apply-templates mode="extract" select=
          "following-sibling::*[1]
            [starts-with(name(),'W_')
           and
            substring-after(substring-after(name(),'_'),'_')='Spots'
             ]
           "/>
      </Expenditure>
     </xsl:template>
    
     <xsl:template mode="extract" match=
      "*[starts-with(name(),'W_')
      and
       substring-after(substring-after(name(),'_'),'_')='Spots'
        ]
      ">
       <Spots><xsl:value-of select="."/></Spots>
      </xsl:template>
    
    
     <xsl:template match=
      "*[starts-with(name(),'W_')
      and
       substring-after(substring-after(name(),'_'),'_')='Spots'
        ]
      "/>
    </xsl:stylesheet>
    

    when applied on the provided source XML document:

    <RowSet>
     <Row>
      <Location_Long_Desc>Sydney Office</Location_Long_Desc>
      <Location_Code>SYDNEY</Location_Code>
      <Daypart_Long_Desc>Peak Night</Daypart_Long_Desc>
      <Daypart_Code>PEANIG</Daypart_Code>
      <W_20050703_Dlr>30849.3</W_20050703_Dlr>
      <W_20050703_Spots>9</W_20050703_Spots>
      <W_20050710_Dlr>16.35</W_20050710_Dlr>
      <W_20050710_Spots>19</W_20050710_Spots>
     </Row>
    </RowSet>
    

    produces the wanted, correct result:

    <RowSet>
       <Row>
          <Location_Long_Desc>Sydney Office</Location_Long_Desc>
          <Location_Code>SYDNEY</Location_Code>
          <Daypart_Long_Desc>Peak Night</Daypart_Long_Desc>
          <Daypart_Code>PEANIG</Daypart_Code>
          <Expenditure>
             <Period>20050703</Period>
             <Value>30849.3</Value>
             <Spots>9</Spots>
          </Expenditure>
          <Expenditure>
             <Period>20050710</Period>
             <Value>16.35</Value>
             <Spots>19</Spots>
          </Expenditure>
       </Row>
    </RowSet>
    

    when applied on the second provided XML document, requested in an Update by the OP:

    <RowSet>
     <Row>
      <Location_Long_Desc>Sydney Office</Location_Long_Desc>
      <Location_Code>SYDNEY</Location_Code>
      <Daypart_Long_Desc>Peak Night</Daypart_Long_Desc>
      <Daypart_Code>PEANIG</Daypart_Code>
      <W_20050703_Dlr>30849.3</W_20050703_Dlr>
      <W_20050710_Dlr>16.35</W_20050710_Dlr>
      <W_20050710_Spots>19</W_20050710_Spots>
     </Row>
    </RowSet>
    

    again the wanted, correct result (No <Spot> element is generated if the immediate sibling isn't a W_nnnnnnnn_Spots) is produced:

    <RowSet>
       <Row>
          <Location_Long_Desc>Sydney Office</Location_Long_Desc>
          <Location_Code>SYDNEY</Location_Code>
          <Daypart_Long_Desc>Peak Night</Daypart_Long_Desc>
          <Daypart_Code>PEANIG</Daypart_Code>
          <Expenditure>
             <Period>20050703</Period>
             <Value>30849.3</Value>
          </Expenditure>
          <Expenditure>
             <Period>20050710</Period>
             <Value>16.35</Value>
             <Spots>19</Spots>
          </Expenditure>
       </Row>
    </RowSet>
    

    Do note:

    1. The use of the identity rule to copy any node "as-is".

    2. The overriding of the identity template only for W_nnnnnnnn_Dlr elements.

    3. The overriding of the identity template with an empty template matching W_nnnnnnnn_Spots elements.

    4. The use of the standard XPath functions: name(), starts-with() and substring-after()

    5. The function ends-with() is only available in XPath 2.0 (XSLT 2.0) and isn't used in this XSLT 1.0 solution.

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