xenei-users Mailing List for Xenei.org - Xenei Utilities & Solutions

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 454-5900

Laust,

Sorry that it has taken me so long to get back to you with this.

There are a couple of issues here....

First in test2 you are making a function call.  Unless the function is a 
static method it needs to have an instance of the object as the first 
parameter.  (See the Xalan extension documentation).

You might try
<xsl:template match="test:test2">
          <xsl:variable name="page"><xtest:test /></xsl:variable>
          <xsl:value-of select="$page"/>
</xsl:template>

It does not seem possible to create an object with and extension element 
and pass that to a method call.  Things get munged around differently in 
the the extension element and extension function returns.  I have spent 
a little time trying to figure out how to mix the two without any luck.

As a second solution would be to use the extension function. The 
following example assumes that dk.defoged.imago.extensions.Test has a 0 
argument constructor, otherwise the arguments would need to be added to 
the new() call.

<xsl:template match="test:test2">
	<xsl:variable name="tst" select="xtest:new()" />
          <xsl:variable name="page" select="xtest:test( $tst )"/>
          <xsl:value-of select="$page"/>
</xsl:template>

As a third solution, you can make the test() method static then your 
example would work.

Hope this helps.
Claude.

p.s. I recently released the newest versions of the code.  In some 
testing today I think that there is a memory management problem but I 
have not been able to isolate it yet.

Laust M. Ladefoged wrote:
> Hej Claude,
> 
> It has been a while, but now I have a little time and I have started
> working on a small idea I have for extending Imago. However I have a
> question/problem I have not been able to resolve.
> 
> I have a need for creating an extension function that can be used as
> part of an XPath expression. The very simplest would be the assignment
> of the returned value of the function to a variable, 
> 
> <xsl:variable name="test" select="extension:test( )"/>
> 
> A simple method that should satisfy the above would be
> 
> public String test(
>         org.apache.xalan.extensions.XSLProcessorContext context,
>         org.apache.xalan.templates.ElemExtensionCall element)
> {
>     return "Testing";
> }
> 
> I have  a stylesheet ala
> 
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> 	version="1.0"
> 	xmlns:xtest="xalan://dk.defoged.imago.extensions.Test"
> 	xmlns:test="dk.defoged.imago.extensions"
> 	extension-element-prefixes="xtest"
> 
> <xsl:template match="/document">
> 	<document>
> 	<xsl:apply-templates/>
> 	</document>
> </xsl:template>
> 
> <xsl:template match="test:test1">
> 	<xtest:test />
> </xsl:template>
> 
> <xsl:template match="test:test2">
>         <xsl:variable name="page" select="xtest:test( )"/>
>         <xsl:value-of select="$page"/>
> </xsl:template>        
> 
> <!-- copy everything else -->
> <xsl:template match="@*|*|text()|processing-instruction()|comment()" >
>  	<xsl:copy>
>    		<xsl:apply-templates
> select="@*|*|text()|processing-instruction()|comment()" />
>  	</xsl:copy>
> </xsl:template>
> </xsl:stylesheet> <!-- close the style sheet -->
> 
> In the above the template for test1 template works fine, however the
> test2 template generates an error. Please note that the above stylesheet
> will fail, but if excluding the test2 part it will work fine.
> 
> Looking in the log I have found the following stacktrace explaining that
> I should provide appropriate arguments to the call, but I am unclear on
> how to provide the required objects.
> 
> 2002-06-19 13:55:18,731 [HttpProcessor[8080][4]] ERROR
> org.xenei.imago.pipeline.ImagoFilter - error(); SystemID:
> file:/opt/lib/imago_1.0.20020501/webapps/imago/test.xsl; Line#: 34;
> Column#: 68 javax.xml.transform.TransformerException:
> javax.xml.transform.TransformerException: Instance method call to method
> name requires an Object instance as first argument
> 	at
> org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction(ExtensionHandlerJavaPackage.java:395)
> ....
> 
> I hope that you can help me figure out how to accomplish this task.
> 
> Best regards,
> Laust.
> 
> 
> 
> ----------------------------------------------------------------------------
>                    Bringing you mounds of caffeinated joy
>                    >>>     http://thinkgeek.com/sf    <<<
> 
> _______________________________________________
> Xenei-users mailing list
> Xen...@li...
> https://lists.sourceforge.net/lists/listinfo/xenei-users

xenei-users Mailing List for Xenei.org - Xenei Utilities & Solutions

xenei-users — For people using Xenei in their projects