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  1. JDK
  2. JDK-8022797

Clarify spliterator characteristics for collections containing no elements

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • 8
    • None
    • core-libs

    Description

      The spliterator for a collection containing no elements should only be required to support SIZED and need not report any additional required characteristics.

      This makes it easier to share a single immutable instance of an empty spliterator for empty collections obtained from Collectionsempty* methods. Since there are no elements it does not matter if additional characteristics are not reported since they would not aid the client to "to control, specialize or simplify computation".

      The reporting of SIZED is important since clients can determine if the spliterator is empty.

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          duplicates

          Sub-task - The sub-task of the issue JDK-8020014 Collections.nCopies(0, T).spliterator() is not ORDERED as expected

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8016774 Collections.emptyList().spliterator().hasCharacteristics(Spliterator.ORDERED) returns false

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8016775 Collections.emptySet().spliterator().hasCharacteristics(Spliterator.DISTINCT)) returns false

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8016776 Collections.emptySortedSet().spliterator() doesn't report DISTINCT, ORDERED, SORTED

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8016777 Collections.emptyMap().[keySet()/entrySet()].spliterator() doesn't report DISTINCT

          • P3 - Major loss of function.
          • Resolved

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              psandoz Paul Sandoz
              psandoz Paul Sandoz
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              Dates

                Created:
                Updated:
                Resolved: