RE: [xsl] Accessing External Java Library

["Michael Kay" <mike@xxxxxxxxxxxx>]

> java -jar saxon8.jar

Well, the first thing on my list of possible causes was that the class isn't
on the classpath, and I also mentioned that a common cause of that is
running with the -jar option which means there isn't a classpath. 

You need to use "java -cp ..... net.sf.saxon.Transform ...


Michael Kay
http://www.saxonica.com/



> -----Original Message-----
> From: Carl Bourne [mailto:cbourne@xxxxxxxxxxxxxxx] 
> Sent: 01 November 2007 14:44
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] Accessing External Java Library
> 
> OK - This is what I have now!
> 
> From the output I can see that the iPGP.iPGP class could not 
> be loaded bit don't understand why!!!
> 
> The iPGP.jar file is in the same directory as the saxon8.jar 
> and the xml, xslt files.
> 
> XML:
> 
> <dataelements>
>     <dataelement>
>         <data>New York</data>
>     </dataelement>
>     <dataelement>
>         <data>Boston</data>
>      </dataelement>
>      <dataelement>
>         <data>Denver</data>
>      </dataelement>
> </dataelements>
> 
> XSLT:
> 
> <?xml version="1.0" ?>
> <xsl:stylesheet version="2.0" 
>       xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>       xmlns:PGP="iPGP.iPGP"
>       exclude-result-prefixes="PGP">
> 
> <xsl:template match="dataelements">
>    <xsl:value-of select="PGP:setArmor(true()),
>     PGP:setConventional(true()),
>     PGP:setInputIsText(true()), 
>     PGP:setOutputIsText(true())"/>
> 
>    <xsl:param name="passphrase">mypswd</xsl:param>
>    <xsl:param name="asciiresult"></xsl:param>
>    <xsl:param name="errormessage"></xsl:param>
> 
>    <xsl:variable name="datain" select="data"/>
>    <xsl:variable name="encryptData" 
> select="PGP:encrypt($passphrase, $datain, $asciiresult, 
> $errormessage)"/>
>    <xsl:value-of select="$encryptData"/> </xsl:template> 
> </xsl:stylesheet>
> 
> Output:
> 
> C:\Documents and Settings\cbourne\My Documents\PGPJava>java 
> -jar saxon8.jar -TJ pgp.xml pgp.xslt Loading iPGP.iPGP No 
> Java class iPGP.iPGP could be loaded Error at xsl:value-of on 
> line 11 of file:/C:/Documents%20and%20Settings/cbourne/
> My%20Documents/PGPJava/pgp.xslt:
>   XPST0003: XPath syntax error at char 20 on line 11 in 
> {...ue()), PGP:setConven
> tional}:
>     Cannot find a matching 1-argument function named
> {iPGP.iPGP}setArmor()
> Loading iPGP.iPGP
> No Java class iPGP.iPGP could be loaded
> Error at xsl:variable on line 18 of
> file:/C:/Documents%20and%20Settings/cbourne/
> My%20Documents/PGPJava/pgp.xslt:
>   XPST0003: XPath syntax error at char 62 on line 18 in {..., 
> $asciiresult, $err
> ormessa...}:
>     Cannot find a matching 4-argument function named
> {iPGP.iPGP}encrypt()
> Error at xsl:param on line 13 of
> file:/C:/Documents%20and%20Settings/cbourne/My%
> 20Documents/PGPJava/pgp.xslt:
>   XTSE0010: xsl:param must be the first element within a 
> template or function Error at xsl:param on line 14 of 
> file:/C:/Documents%20and%20Settings/cbourne/My%
> 20Documents/PGPJava/pgp.xslt:
>   XTSE0010: xsl:param must be the first element within a 
> template or function Error at xsl:param on line 15 of 
> file:/C:/Documents%20and%20Settings/cbourne/My%
> 20Documents/PGPJava/pgp.xslt:
>   XTSE0010: xsl:param must be the first element within a 
> template or function Failed to compile stylesheet. 5 errors detected.
> 
> 
> 
> 
> Carl Bourne
> Intellect
> DDI: +44 1491 842502
> M: +44 7770 284294
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Michael Kay [mailto:mike@xxxxxxxxxxxx]
> Sent: 01 November 2007 12:59
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] Accessing External Java Library
> 
> > 
> > Before calling the external Java library I need to set some 
> > attributes, e.g.
> > 
> > pgp.setArmor(true)
> > pgp.setConventional(true)
> > pgp.setInputIsText(true)
> > pgp.setOutputIsText(true)
> > 
> > Is it possible to do this within the style sheet?
> 
> Yes, if you're careful. The problem is that these methods 
> don't generate any output, so there's a risk that they can 
> get optimized away (or called in the wrong order). The trick 
> is to use them as if they were returning something, and that 
> something were written to your result tree, for example
> 
> <out>
>   <xsl:value-of select="PGP:setArmor(true()), 
> PGP:setConventional(true()),
> PGP: ...etc"/>
> > 
> > Also the XSLT programmers reverence seems to imply that only static 
> > types are supported - is this the case?
> > 
> No. The behaviour of extension functions varies from product 
> to product and release to release. The documentation for 
> Saxon 8.9 is at 
> 
> http://www.saxonica.com/documentation/extensibility/functions.html
> 
> Michael Kay
> http://www.saxonica.com/