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https://issues.apache.org/jira/browse/JEXL-151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14634769#comment-14634769
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Dmitri Blinov commented on JEXL-151:
------------------------------------
For now I have managed to overload operators + and - via JexlArithmetic to
support manipulation of Collection items, it's odd-looking a bit, but works.
Another case is =~ operator which is implemented inside Interpreter.java and
since can not be overloaded, but as I see it requires only three lines of code
to implement
// try contains on collection
if (right instanceof Collection<?>) {
+ if (left instanceof Collection<?>)
+ return ((Collection<?>) right).containsAll((Collection<?>)
left);
+ else
return ((Collection<?>) right).contains(left);
}
Can we include it in near future?
> operators to manipulate j.u.Collection
> --------------------------------------
>
> Key: JEXL-151
> URL: https://issues.apache.org/jira/browse/JEXL-151
> Project: Commons JEXL
> Issue Type: New Feature
> Affects Versions: 3.0
> Reporter: Dmitri Blinov
> Priority: Minor
> Fix For: Later
>
>
> New operators to add or remove collection items to/from Collection. Operators
> can be named as += and -= respectively, or any other way. Operator += can be
> mapped to Collection.addAll(Collection c) if right argument is Collection or
> to Collection.add(Object o) otherwise. Operator -= can be mapped to
> Collection.removeAll(Collection c) if right argument is Collection or to
> Collection.remove(Object o) otherwise. Extend operators =~ (!~) to support
> CollectionA =~ CollectionB usage, in which case it should map to
> B.containsAll(A) operation.
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