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  1. Commons Collections
  2. COLLECTIONS-230

CollectionUtils.size(null) should return 0

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Details

    • Wish
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 3.2
    • 4.0-alpha1, 4.0
    • None
    • None

    Description

      Hello,

      CollectionUtils.size(null) currently throws IllegalArgumentException("Unsupported object type: null"). I think CollectionUtils.size(null) should return 0.

      Why?

      The aim of library is to minimize the amount of code that uses this library. In my experience, in the most cases null collections can be threated as as zero-length. Current behavior causes the need of many trivial null-checks.

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          is depended upon by

          Task - A task that needs to be done. COLLECTIONS-297 Fix javadoc for Collections.size() with regard to null handling

          • Trivial - Cosmetic problem like misspelt words or misaligned text.
          • Closed
          relates to

          Wish - General wishlist item. COLLECTIONS-298 CollectionUtils.sizeIsEmpty(null) should return true

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              Unassigned Unassigned
              yozh Stepan Koltsov
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                Created:
                Updated:
                Resolved: