On Thu, 20 Dec 2018 17:30:44 +0100, Gilles wrote:
Hi.
On Thu, 20 Dec 2018 15:15:55 +0000, Bernd Eckenfels wrote:
Hello,
I don’t know what the usecase is, it is motivated by a Bug about
BigInteger(num, Random). I guess one of the users is actually the
crypto usecase (starting with random numbers to find primes).
I wanted to check how RNG deals with this
You can do it by defining a bridge from [RNG] "UniformRandomProvider"
to "java.util.Random":
--- CUT (untested) ---
public class BridgeToRandom extends Random {
private final UniformRandomProvider delegate;
public BridgeToRandom(UniformRandomProvider rng) {
delegate = rng;
}
@Override
protected int next(int unused) {
return rng.nextInt();
}
}
---CUT---
Then, you can test all the generators implemented in [RNG].
FTR: In case you don't pursue it, please file a report on JIRA
to keep track of this if we want to explore how it could extend
the test suite.
Thanks,
Gilles
(since the additional need
for generating a random bitlength looks unfamiliar but logical to
me).
Is it really not enough to fill all bits randomly (especially for
the
case where it is a 0 .. 2^n range only)?
Discussion is here:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-December/057594.html
Gruss
Bernd
--
http://bernd.eckenfels.net
________________________________
Von: Gilles <gil...@harfang.homelinux.org>
Gesendet: Donnerstag, Dezember 20, 2018 2:16 PM
An: dev@commons.apache.org
Betreff: Re: [rng](site) broken source(current) link
Hi.
On Thu, 20 Dec 2018 12:43:51 +0000, Bernd Eckenfels wrote:
I wanted to check if RNG can construct uniformly distributed
BigIntegers and how it is doing it (answer: it doesn’t)
It could be a feature request.
[I guess that you mean "within a given range".]
Being curious: What's the use-case for random "BigInteger"s?
while doing so
I noticed that the site link to the source is broken, maybe this is
due to git-wip migration?
Yes.
Thanks; fixed now.
BTW: http://cr.openjdk.java.net/~bpb/8146153/webrev.01/index.html
Regards,
Gilles
Gruss
Bernd
--
http://bernd.eckenfels.net
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