-------- Original Message --------
Subject: Is recursive property evaluation supported?
From: Shawn Castrianni <[EMAIL PROTECTED]>
To: 'Ant Users List' <user@ant.apache.org>
Date: 15/04/2008 07:12
I was trying to present a list of choices for the user like an interactive
textual menu. I produced the list of choices and set a property for each. The
user inputs a number corresponding to the choice he wants, and I get the value
corresponding to that choice via my properties I set. However, it doesn't work
because I need to evaluate a recursive property expression:
${releaseName.${releaseName.selection}}
where ${releaseName.selection} would evaluate to the number they typed in [1,
2, 3...] and then the outer property would be evaluated like ${releaseName.1}
if they picked 1.
Is this supported? I was able to mix parameter evaluation inside property
evaluation and it worked fine:
[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
So I was surprised my recursive property evaluation didn't work.
Any help presenting a list of choices to the user where they pick the number
corresponding to their choice would also be helpful.
---
Shawn Castrianni
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To my knowledge, this is not supported. The fact that mixed ${ @{ } }
works, is most likely due to the 2-time processing by the <macrodef>
first, then by the main Ant property parser.
If you want to achieve the same purpose as a nested ${ ${} }, I suggest
you use <propertycopy> from ant-contrib, like this:
<propertycopy property="newprop"
from="releaseName.${releaseName.selection}" />
See ant-contrib documentation for more details.
BR,
Olivier
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