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[xsl] Re: [saxon] How to make a simple running example using packages?

2014-10-18 19:37:19
Thank you, Dr. Kay,

It almost worked from the command line, but this time I got:

C:\xml\XSLT3.0>"C:\Program Files\Java\jre7\bin\java.exe" -Xms1024M
-Xmx1024M  -jar C:\xml\Parsers\Saxon\Ver.9.6\saxon9ee.jar  -t
-repeat:1  t.xml  using-package.xsl;complex-arithmetic.xsl

Saxon-EE 9.6.0.1J from Saxonica
Java version 1.7.0_51
Using license serial number Vxxxxxxxxxxxxxx
Generating byte code...
java.lang.NullPointerException
        at net.sf.saxon.trans.PackageLibrary.getPackage(PackageLibrary.java:75)
        at 
com.saxonica.ee.packages.StylesheetPackageEE.spliceUsedPackage(StylesheetPackageEE.java:61)
        at 
com.saxonica.ee.packages.StylesheetPackageEE.spliceUsePackages(StylesheetPackageEE.java:43)
        at 
net.sf.saxon.style.StylesheetPackage.preprocess(StylesheetPackage.java:371)
        at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:180)
        at net.sf.saxon.s9api.XsltCompiler.compilePackage(XsltCompiler.java:394)
        at 
net.sf.saxon.s9api.XsltCompiler.compilePackages(XsltCompiler.java:447)
        at net.sf.saxon.Transform.doTransform(Transform.java:582)
        at net.sf.saxon.Transform.main(Transform.java:80)
Fatal error during transformation: java.lang.NullPointerException:  (no message)

Cheers,
Dimitre

On Sat, Oct 18, 2014 at 4:58 PM, Michael Kay <mike(_at_)saxonica(_dot_)com> 
wrote:
If you are running from the command line, it is possible to load multiple 
packages by providing a semicolon-separated list of filenames in the -xsl 
parameter. However, I don't think this is well documented or tested and it 
may have restrictions concerning the order of packages.

What is documented and tested is using packages via the s9api XsltCompiler 
interface; essentially you can compile a package into a CompiledPackage 
object, and then make this available to an XsltCompiler using an 
importPackage method.

This is a bit of a stopgap; packages are work in progress. We're thinking 
about "classpath-like" mechanisms for the longer term.

Michael Kay
Saxonica
mike(_at_)saxonica(_dot_)com
+44 (0) 118 946 5893




On 19 Oct 2014, at 00:46, Dimitre Novatchev <dnovatchev(_at_)gmail(_dot_)com> 
wrote:

Hi,

Using the trial version of Saxon 9.6EE and the example package from
the latest XSLT 3.0 Last Call, I am trying to produce a simple,
running example:

using-package.xsl:
==============
<xsl:package name="http://example.org/complex-arithmetic.xsl";
 package-version="1.0"  version="3.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:xs="http://www.w3.org/2001/XMLSchema";
 xmlns:f="http://example.org/complex-arithmetic.xsl";>
 <xsl:use-package name="complex-arithmetic"/>

 <xsl:template match="/">
   <xsl:variable name="vComplex1" select="f:complex-number(1, 0)"
as="map(xs:integer, xs:double)"/>
   Real:      <xsl:sequence select="$vComplex1(0)"/>
   Imaginary: <xsl:sequence select="$vComplex1(1)"/>
 </xsl:template>
</xsl:package>



complex-arithmetic.xsl:
=================
<xsl:package name="complex-arithmetic"
 package-version="1.0"  version="3.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:xs="http://www.w3.org/2001/XMLSchema";
 xmlns:f="http://example.org/complex-arithmetic.xsl";>

 <xsl:function name="f:complex-number"
               as="map(xs:integer, xs:double)" visibility="public">
   <xsl:param name="real" as="xs:double"/>
   <xsl:param name="imaginary" as="xs:double"/>
   <xsl:sequence select="map{ 0:$real, 1:$imaginary }"/>
 </xsl:function>

 <xsl:function name="f:real"
               as="xs:double" visibility="public">
   <xsl:param name="complex" as="map(xs:integer, xs:double)"/>
   <xsl:sequence select="$complex(0)"/>
 </xsl:function>

 <xsl:function name="f:imag"
               as="xs:double" visibility="public">
   <xsl:param name="complex" as="map(xs:integer, xs:double)"/>
   <xsl:sequence select="$complex(1)"/>
 </xsl:function>

 <xsl:function name="f:add"
               as="map(xs:integer, xs:double)" visibility="public">
   <xsl:param name="x" as="map(xs:integer, xs:double)"/>
   <xsl:param name="y" as="map(xs:integer, xs:double)"/>
   <xsl:sequence select="
        f:complex-number(
          f:real($x) + f:real($y),
          f:imag($x) + f:imag($y)"/>
 </xsl:function>

 <xsl:function name="f:multiply"
               as="map(xs:integer, xs:double)" visibility="public">
   <xsl:param name="x" as="map(xs:integer, xs:double)"/>
   <xsl:param name="y" as="map(xs:integer, xs:double)"/>
   <xsl:sequence select="
        f:complex-number(
          f:real($x)*f:real($y) - f:imag($x)*f:imag($y),
          f:real($x)*f:imag($y) + f:imag($x)*f:real($y))"/>
 </xsl:function>

 <!-- etc. -->
</xsl:package>

When I run Saxon 9.6 on using-package.xsl, I get these error messages:

Saxon-EE 9.6.0.1J from Saxonica
Java version 1.7.0_51
Using license serial number Vxxxxxxxxxxxxxxx

Error at xsl:use-package on line 6 column 47 of marrowtr.xsl:
 XTSE3000: Package complex-arithmetic was not found

Error at xsl:variable on line 9 column 101 of marrowtr.xsl:
 XPST0017 XPath syntax error at char 0 on line 9 in {f:complex-number(1, 0)}:
   Cannot find a matching 2-argument function named
 {http://example.org/complex-arithmetic.xsl}complex-number()

Stylesheet compilation failed: 2 errors reported


What should I do in order to make this simple example run as expected?

It is not clear to me how finding a package given its name works -- I
also tried importing complex-arithmetic.xsl into using-package.xsl,
but got this error:

"Error at xsl:import on line 8 column 46 of marrowtr.xsl:
 XTSE0165: Included document complex-arithmetic.xsl is not a stylesheet"


Any guidance how to produce a running example is enormously appreciated.


--
Cheers,
Dimitre Novatchev

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