 | | | Xalan extension functions | Xalan extension functions 2007-05-02 - By Santiago Pericas-Geertsen
John,
Like in Java, you can't invoke a constructor directly. See [1] for
how to create Java objects using 'new'. I believe the syntax you're
using would work for static methods, though.
-- Santiago
[1] http://xml.apache.org/xalan-j/extensions.html#ext-func-calls
On May 2, 2007, at 9:49 AM, Wade, John F. (MSFC-NAS902099)[TBE] wrote:
> It's not Monday anymore. Oh well.
>
> Here's the test case java code. It does exactly nothing.
> Import java.util.*;
>
> public class MyTest
>
> {
>
> public MyTest()
>
> {}
>
>
> }
>
>
> The namespace and component definitions are:
> <?xml version="1.0" encoding="UTF-8" ?>
> <xsl:stylesheet
> xmlns:xsl=http://www.w3.org/1999/XSL/Transform
> xmlns=http://www.w3.org/1999/xhtml
> xmlns:doc=http://nwalsh.com/xsl/documentation/1.0
> exclude-result-prefixes="doc"
> xmlns:xalan=http://xml.apache.org/xalan
> xmlns:mytest="MyTest"
> extension-element-prefixes="mytest"
> version="1.0">
>
> <xalan:component prefix="mytest" functions="MyTest">
> <xalan:script lang="javaclass" src="xalan://MyTest/"/>
> </xalan:component>
>
>
>
> Down in one of the templates I've added a line that says:
> <xsl:value-of select="mytest:MyTest()"/>
>
>
> And the error I get is:
>
> (Location of error unknown)XSLT Error
> (javax.xml.transform.TransformerException):
> javax.xml.transform.TransformerException: Instance method call to
> method MyTest requires an Object instance as first argument
> ...which isn't the error I remember getting last time I tried this,
> but one thing at a time.
>
> Suggestions?
>
> *********************************
> John F. Wade, PE
> MSFC EO20 - TBE
>
>
>
>
> From: Wade, John F. (MSFC-NAS902099)[TBE]
> [mailto:John.F.Wade@(protected)]
> Sent: Fri 4/27/2007 3:29 PM
> To: Kevin Cormier
> Cc: xalan-j-users@(protected)
> Subject: RE: Xalan extension functions
>
> Classpath has been my thought, too. I'm a real beginner at this,
> and the environment I'm working with has two variants, so I'm not
> sure how to determine what the classpath is in each case.
> But, we'll start with the stylesheet and JAVA code on Monday and go
> from there.
>
> Thanks.
>
> JFW
>
>
>
> From: Kevin Cormier [mailto:kcormier@(protected)]
> Sent: Fri 4/27/2007 3:11 PM
> To: Wade, John F. (MSFC-NAS902099)[TBE]
> Cc: xalan-j-users@(protected)
> Subject: Re: Xalan extension functions
>
> Hi John,
>
> All I can think of with the information you've given is to check
> that your
> class is on the classpath.
>
> Could you send your stylesheet and Java class, and also show how you
> invoked the transformation and what the full error message was?
>
>
<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line
-break: after-white-space; ">John,<DIV><BR class="khtml-block-placeholder"></DIV
><DIV> Like in Java, you can't invoke a constructor directly. See [1] for how to
create Java objects using 'new'. I believe the syntax you're using would work
for static methods, though.</DIV><DIV><BR class="khtml-block-placeholder"></DIV
><DIV>-- Santiago</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>[1]
<A href="http://xml.apache.org/xalan-j/extensions.html#ext-func-calls">http:/
/xml.apache.org/xalan-j/extensions.html#ext-func-calls</A></DIV><DIV><BR><DIV>
<DIV>On May 2, 2007, at 9:49 AM, Wade, John F. (MSFC-NAS902099)[TBE] wrote:</DIV
><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> <DIV id=
"idOWAReplyText60140" dir="ltr"> <DIV dir="ltr"><FONT face="Arial" color="
#000000" size="2">It's not Monday anymore. Oh well.</FONT></DIV> <DIV dir="ltr"
><FONT size="2"></FONT> </DIV> <DIV dir="ltr"><FONT size="2">Here's the test
case java code. It does exactly nothing.</FONT></DIV> <DIV dir="ltr"><FONT
size="2"><FONT size="2"><P>Import java.util.*;</P><P>public class MyTest </P><P
>{</P><P>public MyTest() </P><P>{}</P><DIV><BR class="khtml-block-placeholder"><
/DIV><P>}</P></FONT></FONT></DIV> <DIV dir="ltr"><FONT size="2"></FONT> </DIV>
<DIV dir="ltr"><FONT size="2">The namespace and component definitions are:</FONT
></DIV> <DIV dir="ltr"><FONT size="2"><FONT color="#0000ff" size="2"> </FONT><P>
<FONT color="#0000ff" size="2"><?</FONT><FONT color="#800000" size="2">xml<
/FONT><FONT color="#ff00ff" size="2"> </FONT><FONT color="#ff0000" size="2"
>version</FONT><FONT color="#0000ff" size="2">="1.0"</FONT><FONT color="#ff00ff"
size="2"> </FONT><FONT color="#ff0000" size="2">encoding</FONT><FONT color="
#0000ff" size="2">="UTF-8"</FONT><FONT color="#ff00ff" size="2"> </FONT><FONT
color="#0000ff" size="2">?><BR><</FONT><FONT color="#800000" size="2">xsl
:stylesheet</FONT><FONT color="#ff00ff" size="2"> <BR></FONT><FONT color="
#800000" size="2">xmlns</FONT><FONT color="#ff00ff" size="2">:</FONT><FONT color
="#ff0000" size="2">xsl</FONT><FONT color="#0000ff" size="2">=<A href="http:/
/www.w3.org/1999/XSL/Transform">http://www.w3.org/1999/XSL/Transform</A></FONT>
<FONT color="#ff00ff" size="2"> <BR></FONT><FONT color="#ff0000" size="2">xmlns<
/FONT><FONT color="#0000ff" size="2">=<A href="http://www.w3.org/1999/xhtml"
>http://www.w3.org/1999/xhtml</A></FONT><FONT color="#ff00ff" size="2"> <BR><
/FONT><FONT color="#800000" size="2">xmlns</FONT><FONT color="#ff00ff" size="2">
:</FONT><FONT color="#ff0000" size="2">doc</FONT><FONT color="#0000ff" size="2">
=<A href="http://nwalsh.com/xsl/documentation/1.0">http://nwalsh.com/xsl
/documentation/1.0</A></FONT><FONT color="#ff00ff" size="2"> <BR></FONT><FONT
color="#ff0000" size="2">exclude-result-prefixes</FONT><FONT color="#0000ff"
size="2">="doc"</FONT><FONT color="#ff00ff" size="2"> <BR></FONT><FONT color="
#800000" size="2">xmlns</FONT><FONT color="#ff00ff" size="2">:</FONT><FONT color
="#ff0000" size="2">xalan</FONT><FONT color="#0000ff" size="2">=<A href="http:/
/xml.apache.org/xalan">http://xml.apache.org/xalan</A><BR></FONT><FONT color="
#800000" size="2">xmlns</FONT><FONT color="#ff00ff" size="2">:</FONT><FONT color
="#ff0000" size="2">mytest</FONT><FONT color="#0000ff" size="2">="MyTest"<BR><
/FONT><FONT color="#ff0000" size="2">extension-element-prefixes</FONT><FONT
color="#0000ff" size="2">="mytest"<BR></FONT><FONT color="#ff0000" size="2"
>version</FONT><FONT color="#0000ff" size="2">="1.0"></FONT></P><FONT color="
#0000ff" size="2"> </FONT><P><FONT color="#0000ff" size="2"><</FONT><FONT
color="#800000" size="2">xalan:component</FONT><FONT color="#ff00ff" size="2">
</FONT><FONT color="#ff0000" size="2">prefix</FONT><FONT color="#0000ff" size="2
">="mytest"</FONT><FONT color="#ff00ff" size="2"> </FONT><FONT color="#ff0000"
size="2">functions</FONT><FONT color="#0000ff" size="2">="MyTest"><BR><<
/FONT><FONT color="#800000" size="2">xalan:script</FONT><FONT color="#ff00ff"
size="2"> </FONT><FONT color="#ff0000" size="2">lang</FONT><FONT color="#0000ff
" size="2">="javaclass"</FONT><FONT color="#ff00ff" size="2"> </FONT><FONT color
="#ff0000" size="2">src</FONT><FONT color="#0000ff" size="2">="xalan://MyTest/"/
><BR></</FONT><FONT color="#800000" size="2">xalan:component</FONT><FONT
color="#0000ff" size="2">></FONT></P><FONT color="#0000ff" size="2"></FONT><
/FONT></DIV> <DIV dir="ltr"><FONT size="2"></FONT> </DIV> <DIV dir="ltr"><FONT
size="2"></FONT> </DIV> <DIV dir="ltr"><FONT size="2">Down in one of the
templates I've added a line that says:</FONT></DIV> <DIV dir="ltr"><FONT color=
"#0000ff" size="2"> </FONT><P><FONT color="#0000ff" size="2"><</FONT><FONT
color="#800000" size="2">xsl:value-of</FONT><FONT color="#ff00ff" size="2"> <
/FONT><FONT color="#ff0000" size="2">select</FONT><FONT color="#0000ff" size="2"
>="mytest:MyTest()"/></FONT></P><FONT color="#0000ff" size="2"></FONT></DIV>
<DIV dir="ltr"><FONT size="2"></FONT> </DIV> <DIV dir="ltr"><FONT size="2">And
the error I get is:</FONT></DIV> <DIV dir="ltr"><BR>(Location of error unknown
)XSLT Error (javax.xml.transform.TransformerException): javax.xml.transform
.TransformerException: Instance method call to method MyTest requires an Object
instance as first argument<BR></DIV> <DIV dir="ltr"><FONT size="2">...which isn
't the error I remember getting last time I tried this, but one thing at a time.
</FONT></DIV> <DIV dir="ltr"><FONT size="2"></FONT> </DIV> <DIV dir="ltr"><FONT
size="2">Suggestions?</FONT></DIV> <DIV dir="ltr"><FONT face="Arial" color="
#000000" size="2"></FONT> </DIV></DIV> <DIV id="idSignature82333" dir="ltr">
<DIV><FONT face="Arial" color="#000000" size="2">*******************************
**</FONT></DIV> <DIV><FONT face="Arial" size="2">John F. Wade, PE</FONT></DIV>
<DIV><FONT face="Arial" size="2">MSFC EO20 - TBE</FONT></DIV> <DIV><FONT size="2
"></FONT> </DIV> <DIV> </DIV> <DIV> </DIV></DIV> <DIV dir="ltr"><BR> <HR
tabindex="-1"> <FONT face="Tahoma" size="2"><B>From:</B> Wade, John F. (MSFC
-NAS902099)[TBE] [<A href="mailto:John.F.Wade@(protected)">mailto:John.F.Wade@(protected)
.gov</A>]<BR><B>Sent:</B> Fri 4/27/2007 3:29 PM<BR><B>To:</B> Kevin Cormier<BR>
<B>Cc:</B> <A href="mailto:xalan-j-users@(protected)">xalan-j-users@(protected)
.apache.org</A><BR><B>Subject:</B> RE: Xalan extension functions<BR></FONT><BR><
/DIV> <DIV dir="ltr"> <DIV id="idOWAReplyText42563" dir="ltr"> <DIV dir="ltr">
<FONT face="Arial" color="#000000" size="2">Classpath has been my thought, too.
I'm a real beginner at this, and the environment I'm working with has two
variants, so I'm not sure how to determine what the classpath is in each case.
</FONT></DIV> <DIV dir="ltr"><FONT face="Arial" color="#000000" size="2">But,
we'll start with the stylesheet and JAVA code on Monday and go from there.<
/FONT></DIV> <DIV dir="ltr"><FONT face="Arial" color="#000000" size="2"></FONT>
</DIV> <DIV dir="ltr"><FONT face="Arial" size="2">Thanks.</FONT></DIV> <DIV dir=
"ltr"> </DIV></DIV> <DIV id="idSignature42534" dir="ltr"> <DIV><FONT face="Arial
" color="#000000" size="2">JFW</FONT></DIV> <DIV> </DIV> <DIV> </DIV></DIV> <DIV
dir="ltr"><BR> <HR tabindex="-1"> <FONT face="Tahoma" size="2"><B>From:</B>
Kevin Cormier [<A href="mailto:kcormier@(protected)">mailto:kcormier@(protected)<
/A>]<BR><B>Sent:</B> Fri 4/27/2007 3:11 PM<BR><B>To:</B> Wade, John F. (MSFC
-NAS902099)[TBE]<BR><B>Cc:</B> <A href="mailto:xalan-j-users@(protected)"
>xalan-j-users@(protected)</A><BR><B>Subject:</B> Re: Xalan extension
functions<BR></FONT><BR></DIV> <DIV><P><FONT size="2">Hi John,<BR><BR>All I can
think of with the information you've given is to check that your<BR>class is on
the classpath.<BR><BR>Could you send your stylesheet and Java class, and also
show how you<BR>invoked the transformation and what the full error message was?
<BR><BR><BR></FONT></P></DIV></DIV></BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>
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