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From Tim Dawson <tdaw...@wamnet.com>
Subject RE: PROPOSAL: loading tasks from jars for Ant 1.5
Date Wed, 10 Oct 2001 19:05:12 GMT
> -----Original Message-----
> From: Sam Ruby [mailto:rubys@us.ibm.com]
> Sent: Wednesday, October 10, 2001 1:41 PM
> To: ant-dev@jakarta.apache.org
> Subject: Re: PROPOSAL: loading tasks from jars for Ant 1.5
> 
> 
> Ovidiu Predescu wrote:
> >
> > A simpler solution to the one proposed above is to this is to allow
> > antlib to appear inside a <target> element. This way one 
> can write the
> > build.xml file that builds a new antlib in a target, and 
> makes use of
> > it in another target. Something like this:
> > [snip]
> > I'm not sure what are the implications with the current class loader
> > mechanisms, but a solution can probably be worked out.
> 
> I believe that some of the Ant 2.x designs are conducive to such an
> approach, but the last time I looked, this was problematic 
> with the current
> design.
> 
> The root problem is (was?) that tasks objects are created and 
> then executed
> one by one.  It is hard to create a strongly typed task 
> object when the
> task has not been defined just yet.

Maybe I'm not following, but that would be a problem today, wouldn't it?
You could always try to call a task before you define it, and Ant would
fail.  Defining the task with <antlib> would work just like defining the
task with <taskdef> and then using it afterwards.

Tim

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