Not with built-in tasks.
You could write your own task for that.
But dont forget that you can retrieve multiple keys for one value:
hostname=gold
material=gold
While the keys are unique values arent.
So your task would return a list
<searchKeys list="list" file="name.properties" value="gold" separator=","/>
<antunit:assertEquals>
<equals arg1="${list}" arg2="hostname,material"/>
</antunit:assertEquals>
For implementing <searchKeys> see the tutorial
http://ant.apache.org//manual/tutorial-writing-tasks.html
http://ant.apache.org//manual/tutorial-tasks-filesets-properties.html
For using <antunit:*> see
http://ant.apache.org/antlibs/antunit/index.html
Jan
>-----Ursprüngliche Nachricht-----
>Von: Jan [mailto:raghure...@gmail.com]
>Gesendet: Montag, 10. Mai 2010 21:53
>An: Ant Users List
>Betreff: Getting Property Key from Value
>
>Hi All,
>
>Is there any way using ant to get the Property Key from value ?
>
>For examble lets say i have file "name.properties" and in it i
>have entry
>like "hostname=gold", now i want to parse "name.properties"
>get the key of
>value "gold" means reverse read of property, is this possible
>using ant?
>
>Any ideas?
>
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