Parsing nested JSON to CSV

Question

I am trying to parse nested JSON to CSV, using XSLT transformation. In this particular case each child object counting from "datasheet", e.g. "result-sheet" and "balance-sheet", should end up in one CSV file (output) each. Currently I am however just elaborating getting out "result-sheet" only.

I noticed that the content of arrays are getting merged togehter.

Data:

<data>
{
  "datasheets": {
    "result-sheet": {"bank": [1,3], "credit": [2,6]},
    "balance-sheet": {"loans": [4,5], "inventory": [9,0]}
  }
}
</data>

XSL:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="3.0"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:map="http://www.w3.org/2005/xpath-functions/map"
    xmlns:array="http://www.w3.org/2005/xpath-functions/array"
  >

<xsl:output method="text" indent="yes"/>
<xsl:mode on-no-match="shallow-skip"/>

    <!-- Parse JSON to XML -->
    <xsl:template match="data">
          <xsl:apply-templates select="json-to-xml(.)"/>
    </xsl:template>

  <xsl:template match="*">
    <h2>Result sheet</h2>
    <xsl:text>&#xa;</xsl:text>
    <xsl:value-of select="*/(string-join(head(*)/*/@key, ','), *!string-join(*, ','))" separator="&#10;"/>
  </xsl:template>
</xsl:stylesheet>

Result:

Result sheet
bank,credit
13,26
45,90

Wanted result:

bank,credit
1, 2,
3, 6

Martin Honnen · Accepted Answer · 2021-06-15 09:14:50Z

1

I don't quite understand which data you want to have in each line, the following templates creates a line using for-each-pair on each pair of fn:number elements in the two fn:array children of the fn:map with the @key being result-sheet:

  <xsl:template match="*:map[@key = 'result-sheet']">
    <xsl:value-of select="for-each-pair(*:array[1]/*:number, *:array[2]/*:number, function($n1, $n2) { $n1 || ', ' || $n2 })"
      separator="&#10;"/>
  </xsl:template>

answered Jun 15, 2021 at 9:14

Martin Honnen

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