CODEWITHSUNDEEP
xsltxslt-1.0
Hari
Hari

Reputation: 397

Parsing and storing values in array in XSLT 1.0

Thanks in advance for your support. I was just stuck with a problem and tried a lot in all ways.

I have an XSLT 1.0 that need to parse the value of an xml tag by comma and store it in array.

<OPTIONS>val1,,val2,val3,,,val4</OPTIONS>

Here I need to parse the OPTIONS field value by comma and then store it in array. Here I was stuck with the way of storing it in array for further use.

Please advice

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    version="1.0">
    <xsl:output method="text" omit-xml-declaration="yes"/>
    <xsl:variable name="inline-array">
        <!--<Item>A</Item>
        <Item>B</Item>
        <Item>C</Item>-->

        <xsl:call-template name="splitByComma">
            <xsl:with-param name="str" select="OPTIONS"/>
        </xsl:call-template>
    </xsl:variable>

    <xsl:template match="/">
        <xsl:param name="array" select="document('')/*/xsl:variable[@name='inline-array']/*"/>
        <xsl:value-of select="$array[1]"/>          
    </xsl:template>

    <xsl:template name="splitByComma">
        <xsl:param name="str"/>
        <xsl:choose>
            <xsl:when test="contains($str,',')">
                <item><xsl:value-of select="substring-before($str,',')"/></item>
                <xsl:call-template name="splitByComma">
                    <xsl:with-param name="str"
                        select="substring-after($str,',')"/>
                </xsl:call-template>
            </xsl:when>
            <xsl:otherwise>
                <item><xsl:value-of select="$str"/></item>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>
</xsl:stylesheet>

Upvotes: 0

Views: 13807

Answers (1)

Jirka Š.
Jirka Š.

Reputation: 3428

I think this couldn't work in XSLT 1.0 because when you are trying to load content of variable inline-array from the stylesheet (i.e. <xsl:param name="array" select="document('')/*/xsl:variable[@name='inline-array']/*"/>) you actually load its definition. Thus it contains element <xsl:call-template... with child <xsl:with-param... not the result of evaluating it.

enter image description here

So in this case you have two options:

(1) Employ some extending functions like xxx:node-set() if your xslt processor support it

For example if you use MS processor you could add its namespace in document element of your stylesheet: xmlns:msxsl="urn:schemas-microsoft-com:xslt".

The you can call function node-set() from this namespace: <xsl:variable name="array" select="msxsl:node-set($inline-array)/item" />. This will process your variable into nodeset which you can access as another xml: <xsl:value-of select="$array[3]"/>.

Other vendors also could have such extension - look at documentation of your processor. Or look at "exslt".

(2) You could also make another recursive named template taking a position of required value in your csv string. It would return just single value at specified position. But it could be a bit expensive for bigger data - it depends on your expected inputs.

(3) Switch to xslt 2.0 where these things are much easier

You can use tokenize() function in xslt 2.0

<xsl:variable name="OPTIONS" select="'val1,,val2,val3,,,val4'" />
<xsl:variable name="array" select="tokenize($OPTIONS, ',')" />
<xsl:value-of select="$array[3]" />

Upvotes: 3

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