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


Subject: [xsl] Re: [saxon] How to make a simple running example using packages?
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 19 Oct 2014 00:37:05 -0000

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(StylesheetPack
ageEE.java:61)
        at
com.saxonica.ee.packages.StylesheetPackageEE.spliceUsePackages(StylesheetPack
ageEE.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@xxxxxxxxxxxx> 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@xxxxxxxxxxxx
> +44 (0) 118 946 5893
>
>
>
>
> On 19 Oct 2014, at 00:46, Dimitre Novatchev <dnovatchev@xxxxxxxxx> 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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