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https://issues.apache.org/jira/browse/JEXL-79?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741141#action_12741141
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Henri Biestro commented on JEXL-79:
-----------------------------------
We could use a TreeMap for built-in ordering on Integer keys.
But as a "glue" to Java objects & methods, that would be odd and/or may involve
transforming the TreeMap to ArrayList or Object[] on the fly which would be
worse imo...
Or we could use the syntax to instantiate a user-definable List class in the
Interpreter (could extend this to Map too) so the behavior wrt to holes /
extension would be left open.
> Add support for growable arrays (ArrayLists)
> --------------------------------------------
>
> Key: JEXL-79
> URL: https://issues.apache.org/jira/browse/JEXL-79
> Project: Commons JEXL
> Issue Type: New Feature
> Reporter: Sebb
> Fix For: Later
>
> Attachments: JEXL-79.patch, JEXL-79.patch, JEXL-79.patch
>
>
> JEXL now has fixed arrays. Trying to access a non-existent entry generates an
> Exception.
> Might be useful to allow for the creation and manipulation of growable
> arrays, e.g. using ArrayList.
> Writing to a non-existent entry should just create the value; reading should
> return null and empty.
> This would need a new syntax.
> Perhaps:
> list=[1,2,3,...]
> and
> emptyList=[...]
> I did wonder about using (), but that would clash with method invocation.
> Other ideas welcome!
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