CODEWITHSUNDEEP
xmlxsltsubstringxslt-2.0tokenize
user3277152
user3277152

Reputation: 13

XSLT split string by charlength and call function for each substring

For example if you have a string that does not have a fixed length, but is always in increments of 2, how should I break up the string into multiple parts and call a template for each of the substring, as each of them correspond to a different text.

<root>
<Data>
<ErrorNumber>12345678</ErrorNumber>
</Data>
</root>

For the error codes suppose

12 = "Test 1"
34 = "Test 2"
56 = "Test 3"
78 = "Test4"

So that function should call this function and get the output

<xsl:template name="GetErrorCode">
<xsl: param name = "ErrorCode"/>
<xsl: if test = "$ErrorCode = '12'">
<xsl:text> Test 1 </xsl:test>
</xsl:if>
</xsl template>

So basically if I pass 12345678 as param I would get 

Test 1
Test 2
Test 3
Test 4

As Output

Upvotes: 1

Views: 3157

Answers (1)

helderdarocha
helderdarocha

Reputation: 23637

You could use XPath substring to extract the fixed blocks and assign them to XSLT variables:

<xsl:variable name="A"  select="substring(/root/Data/ErrorNumber, 1, 2)"/>
<xsl:variable name="B" select="substring(/root/Data/ErrorNumber, 3, 2)"/>
<xsl:variable name="C"  select="substring(/root/Data/ErrorNumber, 5, 2)"/>
<xsl:variable name="D" select="substring(/root/Data/ErrorNumber, 7, 2)"/>

And from there use the variables in your test.

The template below can be used if the size of the codes are not of fixed length:

<xsl:template name="tokenize">
    <xsl:param name="text"/>
    <xsl:choose>
        <xsl:when test="string-length($text) = 2">
            <token><xsl:value-of select="$text"/></token>
        </xsl:when>
        <xsl:otherwise>
            <token><xsl:value-of select="substring($text, 1, 2)"/></token>
            <xsl:call-template name="tokenize">
                <xsl:with-param name="text" select="substring($text, 3, string-length($text)-2)"/>
            </xsl:call-template>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>

It will return a node-set containing one or more elements, for example, if you call it with:

<xsl:call-template name="tokenize">
     <xsl:with-param name="text" select="/root/Data/ErrorNumber" />
</xsl:call-template>

Where ErrorNumber is 12345678, you get a variable $tokens containing:

<token>12</token>
<token>34</token>
<token>56</token>
<token>78</token>

Then you can call your template passing $tokens/token[2] to obtain the desired result.

Upvotes: 2

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