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From "Conor MacNeill" <co...@cortexebusiness.com.au>
Subject RE: antlib descriptor
Date Tue, 19 Feb 2002 04:33:19 GMT
Adam,

Just curious - why bother with the types collection? Why not just make
antlib the container?

Conor

> -----Original Message-----
> From: Adam Murdoch [mailto:adammurdoch_ml@yahoo.com]
> Sent: Tuesday, 19 February 2002 3:17 PM
> To: ant-dev@jakarta.apache.org
> Subject: antlib descriptor
>
>
>
> Hi,
>
> Below is a proposed antlib descriptor syntax, for use in ant 1.5.  The
> syntax is drawn from the various proposals (antlib, mutant, myrmidon), but
> it is made up of the bits that I happen to prefer, so I'm quite happy to
> change it.
>
> I did start coding this up, but decided to do some refactoring instead, to
> make it a little easier to add (and to swap in new behaviours).  More on
> this in another email.
>
> Before looking at the syntax, I should point out that the scope of what I
> plan to do is much smaller than the other proposals.  All I want to do for
> starters is:
>
> * Replace the task and type defaults.properties descriptors, with
> a combined
> XML descriptor.
>
> * Allow each Jar file in lib/ to optionally supply its own descriptor.
>
> For this reason, I've left out most of the stuff from the other proposals,
> which we can add later, as the proposals mature.  Also, an
> <antlib> task is
> out-of-scope for the time being.
>
> The proposal:
>
> The descriptor name will be META-INF/antlib.xml.  Each Jar file in
> $ANT_HOME/lib will be searched for a descriptor and, if found,
> the tasks and
> types loaded from it.  The system classpath will *not* be searched for
> descriptors.
>
> No change will be made to the ClassLoader hierarchy.  All the task/type
> classes will be loaded via the system ClassLoader.
>
> The DTD for the descriptor will be:
>
> <!ELEMENT antlib types? >
> <!ATTLIST antlib
> 	version CDATA #REQUIRED
> >
>
> <!ELEMENT types (task|data-type)* >
>
> <!ELEMENT task EMPTY >
> <!ATTLIST task
> 	name CDATA #REQUIRED
> 	classname CDATA #REQUIRED
> >
>
> <!ELEMENT data-type EMPTY >
> <!ATTLIST data-type
> 	name CDATA #REQUIRED
> 	classname CDATA #REQUIRED
> >
>
> An example:
>
> <antlib version="1.0">
>   <types>
>     <task name="property"
> classname="org.apache.tools.ant.taskdefs.Property"/>
>     <data-type name="fileset"
> classname="org.apache.tools.ant.types.FileSet"/>
>   </types>
> </antlib>
>
> For the first cut, the descriptors will probably be hand-crafted,
> though it
> shouldn't be a big deal to set up an XDoclet template to generate them.
>
>
> Adam
>
>
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>


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