Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.1
    • Fix Version/s: 3.1.1
    • Labels:
      None

      Description

      Serializing a GammaDistribution and deserializing it, does not result in a cloned distribution that produces the same samples.

      Cause: GammaDistribution inherits from AbstractRealDistribution, which implements Serializable. AbstractRealDistribution has random, in which we have a Well19937c instance, which inherits from AbstractWell. AbstractWell implements Serializable. AbstractWell inherits from BitsStreamGenerator, which is not Serializable, but does have a private field 'nextGaussian'.

      Solution: Make BitStreamGenerator implement Serializable as well.

      This probably affects other distributions as well.

        Attachments

        1. bits-stream-generator-serializable.patch
          0.9 kB
          Dennis Hendriks
        2. DistributionCloneTests.java
          2 kB
          Dennis Hendriks

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            • Assignee:
              Unassigned
              Reporter:
              dhendriks Dennis Hendriks
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              • Created:
                Updated:
                Resolved: