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November 21st, 2009, 11:53 PM
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Registered User
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Join Date: May 2009
Posts: 6
Thanks: 2
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The regular expression in replace() must not be one that matches a zero-length string
Stumped by the following error message:
"The regular expression in replace() must not be one that matches a zero-length string. 68:0"
What is bizarre to me is I am doing the same thing on line 16 which works fine (but is inside an analyze-string). I suspect the error is a misdirection given it points 2 lines below the actual statement.
Insights greatly appreciated,
Sample source (a log file)
Code:
10/1/2009 11:07:53 AM,10/1/2009 12:00:00 AM,"1111","pos3","DROOM","No sale Btn Pressed"
10/1/2009 11:07:54 AM,10/1/2009 12:00:00 AM,"1111","pos3","NO_SALE","1111 AM B drawer: NONE"
10/1/2009 11:13:50 AM,10/1/2009 12:00:00 AM,"1111","pos3","DROOM","No sale Btn Pressed"
10/1/2009 11:13:50 AM,10/1/2009 12:00:00 AM,"1111","pos3","NO_SALE","1111 AM B drawer: NONE"
10/1/2009 11:15:43 AM,10/1/2009 12:00:00 AM,"1111","pos3","NEW_ORDER","New order opened on table number NT01"
10/1/2009 11:15:45 AM,10/1/2009 12:00:00 AM,"1111","pos3","MENUOPTION","NON-ALCOHOL menu pressed (menu link: NON ALCOHOL). orderid: 428882"
10/1/2009 11:15:47 AM,10/1/2009 12:00:00 AM,"1111","pos3","LINE_ADDED","OrdID:428882 added Diet Coke $:1.65 Qty:1 st:1"
10/1/2009 11:15:48 AM,10/1/2009 12:00:00 AM,"1111","pos3","MENUOPTION","Menu Btn: Keyboard (link: KEYBOARD) pressed. orderid: 428882"
10/1/2009 11:15:52 AM,10/1/2009 12:00:00 AM,"1111","pos3","LINE_ADDED","OrdID:428882 added COCINA $:0 Qty:1 st:1"
10/1/2009 11:15:53 AM,10/1/2009 12:00:00 AM,"1111","pos3","MENUOPTION","Send btn pressed. (orderID: 428882)"
10/1/2009 11:15:53 AM,10/1/2009 12:00:00 AM,"1111","pos3","LINE_ADDED_DB","428882 sent: Diet Coke $:1.65 Qty:1"
Actual Code
Code:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs" version="2.0">
<xsl:param name="input-uri" as="xs:string"/>
<xsl:output indent="yes"/>
<xsl:template match="/" name="main">
<xsl:variable name="in" select="unparsed-text($input-uri, 'iso-8859-1')"/>
<xsl:analyze-string select="$in" regex="^([^,]+),([^,]+),"([0-9]{{4}}|[A-Z][0-9])","([a-zA-Z]{{3}}[0-9]|SERVER|EVS_SRV)","([0-9_a-zA-Z]+)","([^"]+)"" flags="m">
<xsl:matching-substring>
<xsl:variable name="entryTime" select="regex-group(1)"/>
<xsl:variable name="employeeID" select="regex-group(3)"/>
<xsl:variable name="stationID" select="upper-case(regex-group(4))"/>
<xsl:variable name="action" select="regex-group(5)"/>
<xsl:variable name="originalDescription" select="replace( regex-group(6), concat($employeeID," "), "")"/>
<xsl:variable name="orderID">
<xsl:choose>
<!-- Match Example: "OrdID: 428881 seats: 1,2,3 closed" -->
<xsl:when test="matches($originalDescription, 'OrdID:\s?[0-9]{6}' )">
<xsl:analyze-string select="$originalDescription" regex="(OrdID:\s?)([0-9]{{6}} )(.+$)">
<xsl:matching-substring>
<xsl:sequence select="regex-group(2)"/>
</xsl:matching-substring>
<xsl:non-matching-substring>
<ERROR/>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
<!-- Match Example: "Close Check pressed. orderid: 428881" -->
<xsl:when test="matches($originalDescription, 'orderid:\s[0-9]{6}')">
<xsl:analyze-string select="$originalDescription" regex="(orderid:\s)([0-9]{{6}})">
<xsl:matching-substring>
<xsl:sequence select="regex-group(2)"/>
</xsl:matching-substring>
<xsl:non-matching-substring>
<ERROR/>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
<!-- Match Example: 428882 reentered -->
<xsl:when test="matches($originalDescription, '[0-9]{6} reentered')">
<xsl:analyze-string select="$originalDescription" regex="^([0-9]{{6}})(\sreentered)$">
<xsl:matching-substring>
<xsl:sequence select="regex-group(2)"/>
</xsl:matching-substring>
<xsl:non-matching-substring>
<ERROR/>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:when>
<xsl:otherwise>
<xsl:text>##</xsl:text>
</xsl:otherwise>
<!-- 428887 sent: BLACK LABEL $:0.99 Qty:1 -->
<!-- New order opened on table number P21 -->
<!-- has SaleID 1063039-1 for $ 11.49 Cash ttl: $11.49 -->
</xsl:choose>
</xsl:variable>
<xsl:variable name="newDescription" select="replace( $originalDescription, $orderID, "")"/>
<xsl:element name="entry" > <xsl:value-of select="$entryTime, $employeeID, $stationID, $action, $orderID, $newDescription"/></xsl:element>
</xsl:matching-substring>
</xsl:analyze-string>
</xsl:template>
</xsl:stylesheet>
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November 22nd, 2009, 06:18 AM
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Wrox Author
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Join Date: Apr 2004
Posts: 4,962
Thanks: 0
Thanked 292 Times in 287 Posts
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Your regular expression is the value of variable $orderID, and there's no way I can tell from reading your code what the value of this variable is. There are at least two paths on which the variable would have the value <ERROR/>, which would certainly trigger this message.
Add some diagnostics to determine the value of $orderID before the failure occurs.
__________________
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer\'s Reference
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