| custom selector which examines multiple files before returning an answer | custom selector which examines multiple files before returning an answer 2005-06-07 - By Frode E. Moe
Hi, I'm trying to implement a way to detect duplicate .jar files (where
only the version differ) and delete all duplicates except the newest.
The way I hoped to implement this was to use the <delete> task together
with a custom Selector, like this:
<delete>
<fileset dir="lib" includes="**/*.jar">
<custom classname="com.coretrek.DuplicateSElector" />
</fileset>
</delete>
Unfortunately this doesn't seem to work out very well, because the
FileSelector interface's "isSelected()" requires my class to provide an
answer for each file on the fly, while I need to read and sort
the entire "candidate" fileset before selecting out the dupes.
Is there another way to implement a FileSet filtering mechanism that
would work for this purpose, or do I have to write a custom
"DeleteDuplicates" task?
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