Updated webrev, based on comments from Brian and Roger:
http://cr.openjdk.java.net/~smarks/reviews/8177290/webrev.2/
s'marks
On 10/30/17 3:50 PM, Stuart Marks wrote:
(also includes 8184690: add Collectors for collecting into unmodifiable List, Set, and Map)Hi all, Here's an updated webrev for this changeset; the previous review thread is here:http://mail.openjdk.java.net/pipermail/core-libs-dev/2017-September/049261.htmlThis webrev includes the following:* specification revisions to provide clearer definitions of "view" collections, "unmodifiable" collections, and "unmodifiable views"* new List.copyOf(), Set.copyOf(), and Map.copyOf() "copy factory" methods * new Collectors.toUnmodifiableList, Set, and Map methods * tests for the new API methodsI've added some assertions that require some independence between the source collection (or map) and the result of the copyOf() method.I've made a small but significant change to Set.copyOf compared to the previous round. Previously, it specified that the first of any equal elements was preserved. Now, it is explicitly unspecified which of any equals elements is preserved. This is consistent with Set.addAll, Collectors.toSet, and the newly added Collectors.toUnmodifiableSet, none of which specify which of duplicate elements is preserved.(The outlier here is Stream.distinct, which specifies that the first element of any duplicates is preserved, if the stream is ordered.)I've also made some minor wording/editorial changes in response to suggestions from David Holmes and Roger Riggs. I've kept the wording changes that give emphasis to "unmodifiable" over "immutable." The term "immutable" is inextricably intertwined with "persistent" when it comes to data structures, and I believe we'll be explaining this forever if Java's "immutable" means something different from everybody else's.Webrev: http://cr.openjdk.java.net/~smarks/reviews/8177290/webrev.1/ Bugs: https://bugs.openjdk.java.net/browse/JDK-8177290 add copy factory methods for unmodifiable List, Set, Map https://bugs.openjdk.java.net/browse/JDK-8184690 add Collectors for collecting into unmodifiable List, Set, and Map Thanks, s'marks
