On Thu, 18 Feb 2021 16:18:42 GMT, jmehrens
<github.com+28367473+jmehr...@openjdk.org> wrote:
>> Yes -- I think in response to this it makes more sense to pull the
>> `ImmutableCollections` classes out for now and only focus on the wrapping of
>> the classes within `Collections` so we aren't blocked by studying and
>> rectifying these inconsistencies.
>
> Maybe it is not correct for UnmodifiableEntrySet::contains to short circuit?
> What if the implementation was changed to:
>
> `public boolean contains(Object o) {
> if (!(o instanceof Map.Entry))
> return c.contains(o); //false, NPE, or CCE
> return c.contains(
> new UnmodifiableEntry<>((Map.Entry<?,?>) o));
> }`
This however changes the behavior of unmodifiable maps compared to before; i.e.
before for other entry sets, they could not throw exception if the object
passed was not map entry; now they can.
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PR: https://git.openjdk.java.net/jdk/pull/2596
