RFR : JDK-8001642 : Add Optional, OptionalDouble, OptionalInt, OptionalLong (original) (raw)

Alan Bateman Alan.Bateman at oracle.com
Tue Mar 5 15:12:31 UTC 2013

On 04/03/2013 20:29, Mike Duigou wrote:

Hello All;

This patch introduces Optional container objects to be used by the lambda streams libraries for returning results. The reference Optional type, as defined, intentionally does not allow null values. null may be used with the Optional.orElse() method. All of the Optional types define hashCode() and equals implementations. Use of Optional types in collections should be generally discouraged but having useful equals() and hashCode() is ever so convenient. http://cr.openjdk.java.net/~mduigou/JDK-8001642/0/webrev/ Mike Just a couple of small things.

Will the docs build complain about the unknown taglets? (@apiNote, @implNote ...)

Optional.of(T) has two @param tags.

In orElseGet currently reads "Supplier who's result is returned ..." but I assume you want the possessive, hence "whose".

Are you planning to include a test? I realize this will get a good workout once the streams work come in.

-Alan.

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