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Subject:
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deleting the continuous commas
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Posted By:
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mrame
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Post Date:
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7/21/2008 4:58:00 PM
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im trying to get a list of values from set of rows. i separate the result with comma. but if the value is null, an ampty comma is obtained. how to overcome this issue.
see my code below:
<xsl:template match="rattrow[.//UsedByProduct = $implSource][.//TL1Attribute]" mode="positional">
<xsl:param name="tl1c"/>
<xsl:variable name="currRow" select="."/>
<xsl:for-each select=".[.//UsedByProduct = $implSource]">
<xsl:choose>
<xsl:when test="$tl1c = 'Retrieve'">
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType='RetrieveIn'], '^[O|Y].*$')]">
<xsl:text>[<</xsl:text>
<xsl:value-of select=".//TL1Attribute"/>
<xsl:text>>]</xsl:text>
</xsl:for-each>
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType='RetrieveIn'], '^M.*$')]">
<xsl:text><</xsl:text>
<xsl:value-of select="$currRow//TL1Attribute"/>
<xsl:text>></xsl:text>
</xsl:for-each>
</xsl:when>
<xsl:when test="$tl1c = 'Read'">
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType='ReadIn'], '^[O|Y].*$')]">
<xsl:text>[<</xsl:text>
<xsl:value-of select="$currRow//TL1Attribute"/>
<xsl:text>>]</xsl:text>
</xsl:for-each>
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType='ReadIn'], '^M.*$')]">
<xsl:text><</xsl:text>
<xsl:value-of select="$currRow//TL1Attribute"/>
<xsl:text>></xsl:text>
</xsl:for-each>
</xsl:when>
<xsl:otherwise>
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType=$tl1c], '^[O|Y].*$')]">
<xsl:text>[<</xsl:text>
<xsl:value-of select="$currRow//TL1Attribute"/>
<xsl:text>>]</xsl:text>
</xsl:for-each>
<xsl:for-each
select=".[matches($currRow//TL1Commands[@cmdType=$tl1c], '^M.*$')]">
<xsl:text><</xsl:text>
<xsl:value-of select="$currRow//TL1Attribute"/>
<xsl:text>></xsl:text>
</xsl:for-each>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
<xsl:if test = "not(position()=last())">
<xsl:text>, </xsl:text>
</xsl:if>
</xsl:template>
If the above template, checks a list of rows, then it produces the output as as shown below:
<AID>, <AID>, ,
I can omit the last comma, but again if the last()-1 is also empty, then an empty comma is produced.
any help is appreciated
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Reply By:
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mhkay
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Reply Date:
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7/21/2008 9:51:54 PM
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There's some very strange code here.
This:
<xsl:for-each select=".[.//UsedByProduct = $implSource]">
is equivalent to
<xsl:if test=".//UsedByProduct = $implSource">
which is surely clearer. Moreover, that condition seems to be always true, because if it weren't true then the template wouldn't match.
Similarly most people would write
<xsl:for-each select=".[matches($currRow//TL1Commands[@cmdType='RetrieveIn'], '^M.*$')]">
as <xsl:if test="matches(....)">
Moreover the three branches of the xsl:choose are so similar that they could surely be turned into a function with a single parameter.
As for the actual question: position()=last() within a template rule is probably not a particularly good idea, because its meaning depends on the set of things selected by the corresponding apply-templates call, which you haven't shown us. If you want to use position()=last(), then in the apply-templates that invokes this template rule you should only select the elements you want to process: that is, you should filter out those that are (to use your term) "null".
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference
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Reply By:
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mrame
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Reply Date:
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7/23/2008 12:46:01 PM
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thank you. i have solved this thro' recursive template.
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