Hi,
I have just been kicking around some ideas with respect to evaluation of
Patterns. When do we want it to occur ? Should it occur when the
Pattern/PatternSet is bound to a name or should it be when a patternset is
applied to get a value (as in FileSet).
ie given the following sequence
<property name="basepackage" value="com/biz/foo" />
<patternset id="mypattern" >
<include name="${basepackage}/Meep.java" />
</patternset>
<property name="basepackage" value="com/biz/bar" />
<fileset dir="${client.src}" >
<patternset refid="mypattern" />
</fileset>
What would you expect to be included. Would it be
"${client.src}/com/biz/foo/Meep.java" or
"${client.src}/com/biz/bar/Meep.java" ?
I used to think it was the first one but I think I have changed my mind. A
few people have wanted this on ant-user but I never thought it would be
useful. However I noticed that it is a common pattern to layour similar
directory structures within projects based on the same framework.
For example IIRC Turbine used to have this requirement (and still does?).
It used to layout a "module" as
<basepackage>.screens
<basepackage>.navigations
<basepackage>.actions
<basepackage>.pages
and it's architecture mandated that.
Now if we want to reuse patternsets then I believe that the best way to do
that would be to evaluate the patterns when they are applied to form a
fileset. Thus the same patternset could be used for multiple turbine
modules by changing value of basepackage and using the paternset in
multiple filesets.
Comments ?
Cheers,
Pete
*-----------------------------------------------------*
| "Faced with the choice between changing one's mind, |
| and proving that there is no need to do so - almost |
| everyone gets busy on the proof." |
| - John Kenneth Galbraith |
*-----------------------------------------------------*
