Summary

SplittableRandom extends from jdk.internal.util.random.RandomSupport.AbstractSplittableGenerator which is not an exported package.

Problem

Since the package is not exported, jdeprscan cannot locate it.

Solution

Use a proxy object to hide the use of AbstractSplittableGenerator.

Specification

public final class SplittableRandom extends AbstractSplittableGenerator

changes to

public final class SplittableRandom implements RandomGenerator, SplittableGenerator

specdiff attached.

Full diff

    diff --git a/src/java.base/share/classes/java/util/SplittableRandom.java b/src/java.base/share/classes/java/util/SplittableRandom.java
    index 77bfa17593a..f3dd55a161a 100644
    --- a/src/java.base/share/classes/java/util/SplittableRandom.java
    +++ b/src/java.base/share/classes/java/util/SplittableRandom.java
    @@ -26,6 +26,8 @@ package java.util;

     import java.math.BigInteger;
     import java.util.concurrent.atomic.AtomicLong;
    +import java.util.random.RandomGenerator;
    +import java.util.random.RandomGenerator.SplittableGenerator;
     import java.util.stream.DoubleStream;
     import java.util.stream.IntStream;
     import java.util.stream.LongStream;
    @@ -86,13 +88,12 @@ import jdk.internal.util.random.RandomSupport.RandomGeneratorProperties;
      * @author  Doug Lea
      * @since   1.8
      */
    -@SuppressWarnings("exports")
     @RandomGeneratorProperties(
             name = "SplittableRandom",
             i = 64, j = 0, k = 0,
             equidistribution = 1
     )
    -public final class SplittableRandom extends AbstractSplittableGenerator {
    +public final class SplittableRandom implements RandomGenerator, SplittableGenerator {

         /*
          * Implementation Overview.
    @@ -182,6 +183,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
         private SplittableRandom(long seed, long gamma) {
             this.seed = seed;
             this.gamma = gamma;
    +        this.proxy = new AbstractSplittableGeneratorProxy();
         }

         /**
    @@ -216,6 +218,31 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
             return (n < 24) ? z ^ 0xaaaaaaaaaaaaaaaaL : z;
         }

    +    /**
    +     * Proxy class to non-public RandomSupportAbstractSplittableGenerator.
    +     */
    +    private class AbstractSplittableGeneratorProxy extends AbstractSplittableGenerator {
    +        @Override
    +        public int nextInt() {
    +            return SplittableRandom.this.nextInt();
    +        }
    +
    +        @Override
    +        public long nextLong() {
    +            return SplittableRandom.this.nextLong();
    +        }
    +
    +        @Override
    +        public java.util.SplittableRandom split(SplittableGenerator source) {
    +            return new SplittableRandom(source.nextLong(), mixGamma(source.nextLong()));
    +        }
    +    }
    +
    +    /**
    +     * Proxy object to non-public RandomSupportAbstractSplittableGenerator.
    +     */
    +    private AbstractSplittableGeneratorProxy proxy;
    +
         /**
          * Adds gamma to seed.
          */
    @@ -251,6 +278,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
             long s = defaultGen.getAndAdd(2 * GOLDEN_GAMMA);
             this.seed = mix64(s);
             this.gamma = mixGamma(s + GOLDEN_GAMMA);
    +        this.proxy = new AbstractSplittableGeneratorProxy();
         }

         /**
    @@ -297,7 +325,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public void nextBytes(byte[] bytes) {
    -        super.nextBytes(bytes);
    +        proxy.nextBytes(bytes);
         }

         /**
    @@ -307,7 +335,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public Stream<SplittableGenerator> splits() {
    -        return super.splits();
    +        return proxy.splits();
         }

         /**
    @@ -318,7 +346,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public Stream<SplittableGenerator> splits(long streamSize) {
    -        return super.splits(streamSize, this);
    +        return proxy.splits(streamSize, this);
         }

         /**
    @@ -329,7 +357,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public Stream<SplittableGenerator> splits(SplittableGenerator source) {
    -        return super.splits(Long.MAX_VALUE, source);
    +        return proxy.splits(Long.MAX_VALUE, source);
         }

         /**
    @@ -341,7 +369,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public Stream<SplittableGenerator> splits(long streamSize, SplittableGenerator source) {
    -        return super.splits(streamSize, source);
    +        return proxy.splits(streamSize, source);
         }

         /**
    @@ -356,7 +384,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public IntStream ints(long streamSize) {
    -        return super.ints(streamSize);
    +        return proxy.ints(streamSize);
         }

         /**
    @@ -370,7 +398,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public IntStream ints() {
    -        return super.ints();
    +        return proxy.ints();
         }

         /**
    @@ -390,7 +418,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public IntStream ints(long streamSize, int randomNumberOrigin, int randomNumberBound) {
    -        return super.ints(streamSize, randomNumberOrigin, randomNumberBound);
    +        return proxy.ints(streamSize, randomNumberOrigin, randomNumberBound);
         }

         /**
    @@ -410,7 +438,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public IntStream ints(int randomNumberOrigin, int randomNumberBound) {
    -        return super.ints(randomNumberOrigin, randomNumberBound);
    +        return proxy.ints(randomNumberOrigin, randomNumberBound);
         }

         /**
    @@ -425,7 +453,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public LongStream longs(long streamSize) {
    -        return super.longs(streamSize);
    +        return proxy.longs(streamSize);
         }

         /**
    @@ -439,7 +467,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public LongStream longs() {
    -        return super.longs();
    +        return proxy.longs();
         }

         /**
    @@ -459,7 +487,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public LongStream longs(long streamSize, long randomNumberOrigin, long randomNumberBound) {
    -        return super.longs(streamSize, randomNumberOrigin, randomNumberBound);
    +        return proxy.longs(streamSize, randomNumberOrigin, randomNumberBound);
         }

         /**
    @@ -479,7 +507,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public LongStream longs(long randomNumberOrigin, long randomNumberBound) {
    -        return super.longs(randomNumberOrigin, randomNumberBound);
    +        return proxy.longs(randomNumberOrigin, randomNumberBound);
         }

         /**
    @@ -494,7 +522,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public DoubleStream doubles(long streamSize) {
    -        return super.doubles(streamSize);
    +        return proxy.doubles(streamSize);
         }

         /**
    @@ -509,7 +537,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public DoubleStream doubles() {
    -        return super.doubles();
    +        return proxy.doubles();
         }

         /**
    @@ -529,7 +557,7 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public DoubleStream doubles(long streamSize, double randomNumberOrigin, double randomNumberBound) {
    -        return super.doubles(streamSize, randomNumberOrigin, randomNumberBound);
    +        return proxy.doubles(streamSize, randomNumberOrigin, randomNumberBound);
         }

         /**
    @@ -549,6 +577,6 @@ public final class SplittableRandom extends AbstractSplittableGenerator {
          */
         @Override
         public DoubleStream doubles(double randomNumberOrigin, double randomNumberBound) {
    -        return super.doubles(randomNumberOrigin, randomNumberBound);
    +        return proxy.doubles(randomNumberOrigin, randomNumberBound);
         }
     }