Problem with lookup-table and single quotes

Question

SOA Suite 10.1.3.3. I have an ESB project with an XSLT map that uses orcl:lookup-table to translate values. I use this instead of lookup-dvm because I want non-IT users to manage the mappings without having access to the ESB Console.
According to the doco:-
G.1.79 lookup-table
orcl:lookup-table(table, inputColumn, key, outputColumn, datasource)
This function returns a string based on the SQL query generated from the parameters.
The string is obtained by executing:
SELECT outputColumn FROM table WHERE inputColumn = key
The problem I'm having is that it seems if "key" contains a single quote (i.e an apostrophe), then lookup-table fails to find the corresponding value - even though the value in table.inputColumn also contains the single quote.
I've put the incoming into an XSL variable, but to no avail.
<xsl:variable name="incoming">
<xsl:value-of select="/obj1:DEV_MESSAGE_TYP/DATA1"/>
</xsl:variable>
<xsl:variable name="dvm-text">
<xsl:value-of select="orcl:lookup-table('MYTABLE','INVAL',$incoming,'OUTVAL','ds/dev')"/>
</xsl:variable>
Are there any XSLT Gurus out there that have come across this or can think of ways around it?
Thanks in advance...
Regards,
Greg

Answer 1

Ok - the above was on the right track but wasn't 100% because it can't handle more than 1 single quote (apostrophe) in the input to lookup-table.
I've since found a better solution - an XSLT re-usable template that operates recursively and so can replace multiple occurances of single quotes. I've modified it to handle a null input value, otherwise lookup-table will just return the value of the first row in the lookup table - doh! The way I've done it below, if null is passed in, then null will be returned.
This goes at the top of your XSLT map file...
<!-- reusable replace-string function -->
<xsl:template name="replace-string">
<xsl:param name="text"/>
<xsl:param name="from"/>
<xsl:param name="to"/>
<xsl:choose>
<xsl:when test="contains($text, $from)">
     <xsl:variable name="before" select="substring-before($text, $from)"/>
     <xsl:variable name="after" select="substring-after($text, $from)"/>
     <xsl:value-of select="$before"/>
     <xsl:value-of select="$to"/>
<xsl:call-template name="replace-string">
<xsl:with-param name="text" select="$after"/>
<xsl:with-param name="from" select="$from"/>
<xsl:with-param name="to" select="$to"/>
     </xsl:call-template>
</xsl:when>
<xsl:when test="$text=''">NULL</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$text"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
Then you call it from within the XSLT map as follows:-
<!-- if contains a single quote, replace with 2x single quotes. This makes lookup-table work! -->
<xsl:variable name="incoming">
<xsl:call-template name="replace-string">
<xsl:with-param name="text" select="inp1:myinputfield"/>
<xsl:with-param name="from">'</xsl:with-param>
<xsl:with-param name="to" select="'&amp;apos;&amp;apos;'"/>
</xsl:call-template>
</xsl:variable>
<xsl:variable name="dvm-text">
<xsl:value-of select="orcl:lookup-table('MYLOOKUPTABLE','INVAL',$incoming,'OUTVAL','ds/dev')"/>
</xsl:variable>
<!-- lookup-table returns null if input value not found. Output original value instead -->
<xsl:choose>
<xsl:when test="$dvm-text=''">
<xsl:value-of select="inp1:myinputfield"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$dvm-text"/>
</xsl:otherwise>
</xsl:choose>
Much Thanks to everyone who shares information and methods on the Internet!
Cheers,
Greg