Dmitri Blinov created JEXL-218:
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Summary: Overloaded JexlArithmetic.empty() method is not called
for a class implementing Map interface
Key: JEXL-218
URL: https://issues.apache.org/jira/browse/JEXL-218
Project: Commons JEXL
Issue Type: Bug
Affects Versions: 3.0
Reporter: Dmitri Blinov
Sorry for not providing a test case but this is a rare problem I haven't
managed to catch. I have a class which implements a {{Map}} interface and I
have an overloaded {{JexlArithmetic.empty()}} and {{JexlArithmetic.size()}}
methods for this class, and these methods are *not* related to correspondent
{{Map.isEmpty()}} and {{Map.size()}} methods, they provide separate semantics
in my case. Apart from the point that this design is questionable, most of the
time everything works as expected in jexl, i.e. when {code}empty(x){code} or
{code}size(x){code} operators are used in scripting, the overloaded
{{JexlArithmetic.empty()}} and {{JexlArithmetic.size()}} are called. But
sometimes in rare circumstances these operators are not called and
{{Map.isEmpty()}} and {{Map.size()}} methods respectively are called instead. I
suspect this has something to do with operators caching, may be you'll be able
to check the code?
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