--- a/src/java.base/share/classes/java/util/SplittableRng.java Thu Jun 27 16:46:44 2019 -0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,192 +0,0 @@
-/*
- * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-package java.util;
-
-import java.util.stream.Stream;
-import java.util.stream.StreamSupport;
-import java.util.stream.IntStream;
-import java.util.stream.LongStream;
-import java.util.stream.DoubleStream;
-
-/**
- * This interface is designed to provide a common protocol for objects
- * that generate sequences of pseudorandom numbers (or Boolean values)
- * and furthermore can be <i>split</i> into two objects (the original
- * one and a new one) each of which obey that same protocol (and therefore
- * can be recursively split indefinitely).
- *
- * <p>Ideally, all {@code SplittableRNG} objects produced by recursive
- * splitting from a single original {@code SplittableRNG} object are
- * statistically independent of one another and individually uniform.
- * Therefore we would expect the set of values collectively generated
- * by a set of such objects to have the same statistical properties as
- * if the same quantity of values were generated by a single thread
- * using a single {@code SplittableRNG} object. In practice, one must
- * settle for some approximation to independence and uniformity.
- *
- * <p>Methods are provided to perform a single splitting operation and
- * also to produce a stream of generators split off from the original
- * (by either iterative or recursive splitting, or a combination).
- *
- * <p>An implementation of the {@code SplittableRng} interface must provide
- * concrete definitions for the methods {@code nextInt()}, {@code nextLong},
- * {@code period()}, {@code split()}, {@code split(SplittableRng)},
- * {@code splits()}, {@code splits(long)}, {@code splits(SplittableRng)},
- * and {@code splits(long, SplittableRng)}. Perhaps the most convenient
- * way to implement this interface is to extend the abstract class
- * {@link java.util.AbstractSplittableRng}.
- *
- * <p>Objects that implement {@code java.util.SplittableRNG} are
- * typically not cryptographically secure. Consider instead using
- * {@link java.security.SecureRandom} to get a cryptographically
- * secure pseudo-random number generator for use by
- * security-sensitive applications.
- *
- * @author Guy Steele
- * @since 1.9
- */
-public interface SplittableRng extends StreamableRng {
-
- /**
- * Returns a new pseudorandom number generator, split off from
- * this one, that implements the {@code Rng} and {@code SplittableRng}
- * interfaces.
- *
- * This pseudorandom number generator may be used as a source of
- * pseudorandom bits used to initialize the state the new one.
- *
- * @return a new object that implements the {@code Rng} and
- * {@code SplittableRng} interfaces
- */
- SplittableRng split();
-
- /**
- * Returns a new pseudorandom number generator, split off from
- * this one, that implements the {@code Rng} and {@code SplittableRng}
- * interfaces.
- *
- * @param source a {@code SplittableRng} instance to be used instead
- * of this one as a source of pseudorandom bits used to
- * initialize the state of the new ones.
- *
- * @return an object that implements the {@code Rng} and
- * {@code SplittableRng} interfaces
- */
- SplittableRng split(SplittableRng source);
-
- /**
- * Returns an effectively unlimited stream of new pseudorandom
- * number generators, each of which implements the {@code SplittableRng}
- * interface.
- *
- * This pseudorandom number generator may be used as a source of
- * pseudorandom bits used to initialize the state the new ones.
- *
- * @implNote It is permitted to implement this method in a manner
- * equivalent to {@code splits(Long.MAX_VALUE)}.
- *
- * @return a stream of {@code SplittableRng} objects
- */
- default Stream<SplittableRng> splits() {
- return this.splits(this);
- }
-
- /**
- * Returns a stream producing the given {@code streamSize} number of
- * new pseudorandom number generators, each of which implements the
- * {@code SplittableRng} interface.
- *
- * This pseudorandom number generator may be used as a source of
- * pseudorandom bits used to initialize the state the new ones.
- *
- * @param streamSize the number of values to generate
- * @return a stream of {@code SplittableRng} objects
- * @throws IllegalArgumentException if {@code streamSize} is
- * less than zero
- */
- Stream<SplittableRng> splits(long streamSize);
-
- /**
- * Returns an effectively unlimited stream of new pseudorandom
- * number generators, each of which implements the {@code SplittableRng}
- * interface.
- *
- * @implNote It is permitted to implement this method in a manner
- * equivalent to {@code splits(Long.MAX_VALUE, source)}.
- *
- * @param source a {@code SplittableRng} instance to be used instead
- * of this one as a source of pseudorandom bits used to
- * initialize the state of the new ones.
- *
- * @return a stream of {@code SplittableRng} objects
- */
- Stream<SplittableRng> splits(SplittableRng source);
-
- /**
- * Returns a stream producing the given {@code streamSize} number of
- * new pseudorandom number generators, each of which implements the
- * {@code SplittableRng} interface.
- *
- * @param streamSize the number of values to generate
- * @param source a {@code SplittableRng} instance to be used instead
- * of this one as a source of pseudorandom bits used to
- * initialize the state of the new ones.
- * @return a stream of {@code SplittableRng} objects
- * @throws IllegalArgumentException if {@code streamSize} is
- * less than zero
- */
- Stream<SplittableRng> splits(long streamSize, SplittableRng source);
-
- /**
- * Returns an effectively unlimited stream of new pseudorandom
- * number generators, each of which implements the {@code Rng}
- * interface. Ideally the generators in the stream will appear
- * to be statistically independent.
- *
- * @implNote The default implementation calls {@code splits()}.
- *
- * @return a stream of objects that implement the {@code Rng} interface
- */
- default Stream<Rng> rngs() {
- return this.splits().map(x -> (Rng)x);
- }
-
- /**
- * Returns a stream producing the given {@code streamSize} number of
- * new pseudorandom number generators, each of which implements the
- * {@code Rng} interface. Ideally the generators in the stream will
- * appear to be statistically independent.
- *
- * @implNote The default implementation calls {@code splits(streamSize)}.
- *
- * @param streamSize the number of generators to generate
- * @return a stream of objects that implement the {@code Rng} interface
- * @throws IllegalArgumentException if {@code streamSize} is
- * less than zero
- */
- default Stream<Rng> rngs(long streamSize) {
- return this.splits(streamSize).map(x -> (Rng)x);
- }
-}