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https://issues.apache.org/jira/browse/RNG-116?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex D Herbert resolved RNG-116.
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Fix Version/s: 1.3
Resolution: Implemented
In git master.
> RandomSource to expose supported functionality and seed size
> ------------------------------------------------------------
>
> Key: RNG-116
> URL: https://issues.apache.org/jira/browse/RNG-116
> Project: Commons RNG
> Issue Type: Improvement
> Components: simple
> Affects Versions: 1.3
> Reporter: Alex D Herbert
> Assignee: Alex D Herbert
> Priority: Minor
> Fix For: 1.3
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> h2. Interface support
> The {{RandomSource}} can be used to created instances that may implement
> {{JumpableUniformRandomProvider}}. This requires casting the returned value
> from the {{create}} method. Add methods to expose the interfaces supported by
> the provider without instantiation.
> {code:java}
> public boolean isJumpable();
> public boolean isLongJumpable();
> {code}
> This will allow:
> {code:java}
> RandomSource source = ...;
> if (source.isJumpable()) {
> JumpableUniformRandomProvider rng =
> (JumpableUniformRandomProvider) RandomSource.create(source);
> }
> {code}
> h2. Seed size
> The internal components used to build the generators by RandomSource know the
> size of the seed required for the constructor. This can be exposed in a
> method:
> {code:java}
> public int getSeedByteSize();
> {code}
> This will allow:
> {code:java}
> RandomSource source = ...;
> SecureRandom sr = new SecureRandom();
> UniformRandomProvider rng = RandomSource.create(source,
> sr.generateSeed(source.getSeedByteSize()));
> {code}
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