As far as I can see the Java class java.awt.FontMetrics does not have a
method getFontMetrics().
Generally, you may find the command line option -TJ useful for debugging
this kind of problem.
Also, please get out of the habit of writing this kind of code:
<xsl:variable name="metrics">
<xsl:value-of select="FontMetrics:getFontMetrics()"/>
</xsl:variable>
when you mean
<xsl:variable name="metrics" select="FontMetrics:getFontMetrics()"/>
This is always highly inefficient, and when you are manipulating external
Java objects it will almost certainly make your code incorrect, because you
really don't want to convert the object to a string.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Ylvisaker, Steve
[mailto:steve(_dot_)j(_dot_)ylvisaker(_at_)medtronic(_dot_)com]
Sent: 22 December 2008 15:37
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Using Java in XSLT to determine font metrics
This is my first attempt at calling an external Java method
to do work on behalf of a stylesheet. I'm not a Java
developer so I think I need a fairly complete "cookbook"
description of how to do this. My objective is to determine
the exact length, in pixels, of a given string based on the
font and font size in play.
I'm sure I have two problems here. (1) to properly bind my
stylesheet to a Java name space and (2) proper use of the
Java methods that parse my font and return the metrics I'm
looking for.
Following is my failed stylesheet, annotated with comments
explaining what I am "trying" to do at each step. I am very
certain that I am not properly telling whomever which font I
am using.
I am working within the <oXygen/> IDE (Saxon8) and have
successfully gotten the example on page 134 of Michael's
XSLT 2.0 3rd Edition to work. This tells me that I am
somewhat successful in using Java extensions.
When I process this stylesheet I get the following error:
Cannot find a matching 0-argument function named
{ext://java.awt.FontMetrics}getFontMetrics()
Unfortunately this error message doesn't tell me if the
problem is that I'm not finding the Java method or if I'm
finding it but not using it properly.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="2.0"
xmlns:FontMetrics="ext://java.awt.FontMetrics">
<xsl:output indent="yes"/>
<xsl:template match="/">
<xsl:variable name="tstString" select="'Hello World'"/>
<!-- declair a font and fontsize - not shure who is listening
to this -->
FontMetrics:Font("helveticaWorld", Font.PLAIN, 10)
<!-- obtain the metrics for the specified font -->
<xsl:variable name="metrics">
<xsl:value-of select="FontMetrics:getFontMetrics()"/>
</xsl:variable>
<!-- obtain the length in pixels of the test string -->
<xsl:variable name="resultStringLength">
<xsl:value-of select="metrics.stringWidth($tstString)"/>
</xsl:variable>
<!-- display the result -->
<xsl:message>result:<xsl:value-of
select="$resultStringLength"/></xsl:message>
</xsl:template>
</xsl:stylesheet>
Thanks in advance for you help. Please keep in mind that I am
not a Java developer at all so nothing is obvious to me.
Steve Ylvisaker
[CONFIDENTIALITY AND PRIVACY NOTICE]
Information transmitted by this email is proprietary to
Medtronic and is intended for use only by the individual or
entity to which it is addressed, and may contain information
that is private, privileged, confidential or exempt from
disclosure under applicable law. If you are not the intended
recipient or it appears that this mail has been forwarded to
you without proper authority, you are notified that any use
or dissemination of this information in any manner is
strictly prohibited. In such cases, please delete this mail
from your records.
To view this notice in other languages you can either select
the following link or manually copy and paste the link into
the address bar of a web browser: http://emaildisclaimer.medtronic.com
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail:
<mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--