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  1. Commons Collections
  2. COLLECTIONS-389

Inconsistent Javadoc comment and code for mapTransformer(Map<? super I, ? extends O>) in org.apache.commons.collections.TransformerUtils

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 4.0, 4.x
    • Fix Version/s: 4.0-alpha1, 4.0
    • Component/s: Collection
    • Labels:
    • Environment:

      Platform Independent

      Description

      The Javadoc comment below states that the method "throws IllegalArgumentException if the map is null":
      /**
      ....

      • @param map the map to use to transform the objects
      • @return the transformer
      • @throws IllegalArgumentException if the map is null
        */
        public static <I, O> Transformer<I, O> mapTransformer(Map<? super I, ? extends O> map) { return MapTransformer.mapTransformer(map); }

        However, the method returns a NULL_INSTANCE object instead of throwing IllegalArgumentException when called with null.

      Suggested Fixes:
      1. Change "@throws IllegalArgumentException if the map is null" and "@return" to "@return NULL_INSTANCE if the map is null".
      or
      2. Remove the entire "throws IllegalArgumentException if the map is null".

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            • Assignee:
              Unassigned
              Reporter:
              shinhwei SHIN HWEI TAN
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