IdentityObject and InlineObject
brian.goetz at oracle.com
Sun Apr 12 15:59:11 UTC 2020
> Possible candidates:
> - Identity, as in "class Foo implements Identity". This says what it
> means, though it is quite possible that it will clash with existing
> types. (This is not an absolute disqualifier, but it is a
> - IdentityObject. This is where we are now; it always felt a little
> clunky to me.
> - ObjectIdentity ("class Foo implements ObjectIdentity"). Better
> than IdentityObject, less likely to clash than Identity.
> - WithIdentity. Not the best name, but less likely than Identity to
Thinking on this for a few days ...
I like "Identity" but it is sure to clash with every ORM and similar
system out there. I think I slightly prefer `ObjectIdentity` to
`IdentityObject`, and both to `WithIdentity` and `HasIdentity`.
Note that originally we were thinking that these types might be abstract
classes; now that they are interfaces, this has slight consequences for
the natural naming, as interfaces are often named for adjectives
(Comparable) but abstract classes are almost always named for nouns. We
should evaluate these, in part, on how they sound in
class C implements I
class String implements ObjectIdentity
more directly expresses the point -- that one of the behaviors of String
is that it has an object identity -- than does:
class String implements IdentityObject
It also puts the focus on the _identity_, rather than the object itself,
which is consistent with breaking this behavior out of the root type and
into a "mix in."
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