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Posted to dev@commons.apache.org by Phil Steitz <ph...@gmail.com> on 2013/04/05 19:02:22 UTC
Re: [jira] [Commented] (MATH-963) Interface "RandomGenerator" is
missing "nextLong(long)" method
This discussion should be on the mailing list.
On 4/5/13 3:20 AM, Gilles (JIRA) wrote:
> [ https://issues.apache.org/jira/browse/MATH-963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13623503#comment-13623503 ]
>
> Gilles commented on MATH-963:
> -----------------------------
>
> bq. [...] you can use a RandomAdaptor. That is really what led to tearing off the interface from Random.
>
> If, as it looks like, "RandomAdaptor" is a bridge from "RandomGenerator" to "j.u.Random", it does not need to implement the "RandomGenerator" API.
Look at what the adaptor does. It wraps a RandomGenerator. It
makes it possible to make the underlying PRNG pluggable in apps that
use j.u.Random.
> This is what a bridge is for: change from one API to another. Hence, it is also not necessary to mimic the target API.
>
> If "RandomGenerator" were an abstract class, you'd be able to use it in the same way with "RandomAdaptor".
>
> It seems that the purpose of "RandomAdaptor" being also a "RandomGenerator" is for the _same_ object reference to be passed both to code that expects a "j.u.Random" and to code that expects a "RandomGenerator".
> I find it better to not mix the two types in this way.
>
>
>> Interface "RandomGenerator" is missing "nextLong(long)" method
>> --------------------------------------------------------------
>>
>> Key: MATH-963
>> URL: https://issues.apache.org/jira/browse/MATH-963
>> Project: Commons Math
>> Issue Type: Bug
>> Affects Versions: 3.2
>> Reporter: Gilles
>> Priority: Trivial
>> Labels: api-change
>>
>> There is a method "nextInt(int)" but not "nextLong(long)".
>> The "BitsStreamGenerator" class already implements it.
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