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From Jacob Kjome <h...@visi.com>
Subject Re: Problem with xml-apis.jar located both in the classpath of a taskdef and ant lib.
Date Mon, 08 Jan 2007 17:12:12 GMT
Quoting Steve Loughran <stevel@apache.org>:

> carmel cohen wrote:
> > Hi,
> >
> > I am trying to write an ant task that uses xml-apis.jar.
> > My problem is that i want to be able to define what version of
> > xml-apis.jaris used.
> > The jar is located both under %ANT_HOME%/lib (and the eclipse's ant lib if
> > the ant is run from eclipse) and both in my project dir, under a library
> > called "bin".
> > so some classes (e.g. org.w3c.dom.Document, also found in the JRE lib-
> > rt.jar) may appear in more then one location.
> > The problem is that when i define a task as follows:
> >
> > *<path id="fileHandler.classpath">
> >  <pathelement location="./bin/fileHandler.jar"/>
> >  <pathelement location="./bin/xalan.jar"/>
> >  <pathelement location="./bin/xercesImpl.jar"/>
> >  <pathelement location="./bin/xml-apis.jar"/>
> > </path>
> >
> > <taskdef name="fileHandlerTask"
> >   classname="com.impl**.ant.antTasks.PropertyFileHandlerTask"
> >   classpathref="fileHandler.classpath"/>*
> > **
> > Then during run time (I am trying to run it both from eclipse and command
> > line) I am getting NoSuchMethodException due to the fact that the method *
> > getInputEncoding* defined in Document was only added at xerces v 2.7, and
> > the Document defined in the JRE lib and under
> > %ANT_HOME%/lib/xml-apis.jar do
> > not define this method.
> >
> > My question is whether I can define the order of the jars in the classpath
> > so that I will be able to make sure that the Classes that are defined in
> > the
> > *fileHandler.classpath *path will precede the classes defined in the other
> > locations.
> >
> > Updating the jar at %ANT_HOME%/lib/ is not an option because I want to be
> > able to run this script from more then one location, so I want to find a
> > solution that does not require any modifications in the machine that I am
> > using .
>
> XML parser handling is wierd; even having the new xalan/xerces on the
> tasks classpath isnt going to make it the default XML parser. Its not
> just a matter of the wrong api being picked up; ant -diagnostics will
> show you which xml parser is being created.
> You will need to upgrade ant's libraries. Ant1.7.1 will ship with xerces
> 2.7.0, incidentally.
>

You mean Xerces-2.9.0 and xml-apis-1.3.04

Jake

> -steve
>
>
>
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