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https://issues.apache.org/jira/browse/MATH-927?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gilles resolved MATH-927.
-------------------------
Resolution: Fixed
Fix Version/s: 3.1.1
> GammaDistribution cloning broken
> --------------------------------
>
> Key: MATH-927
> URL: https://issues.apache.org/jira/browse/MATH-927
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.1
> Reporter: Dennis Hendriks
> Fix For: 3.1.1
>
> Attachments: bits-stream-generator-serializable.patch,
> DistributionCloneTests.java
>
>
> 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.
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