--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/util/AbstractSpliteratorRng.java Tue Jun 04 13:07:35 2019 -0400
@@ -0,0 +1,317 @@
+/*
+ * Copyright (c) 2013, 2019, Oraclea 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.Spliterator;
+import java.util.function.Consumer;
+import java.util.function.IntConsumer;
+import java.util.function.LongConsumer;
+import java.util.function.DoubleConsumer;
+import java.util.stream.StreamSupport;
+import java.util.stream.IntStream;
+import java.util.stream.LongStream;
+import java.util.stream.DoubleStream;
+
+/**
+ * This class overrides the stream-producing methods (such as {@code ints()})
+ * in class {@code AbstractRng} to provide {@code Spliterator}-based
+ * implmentations that support potentially parallel execution.
+ *
+ * To implement a pseudorandom number generator, the programmer needs
+ * only to extend this class and provide implementations for the methods
+ * {@code nextInt()}, {@code nextLong()}, {@code makeIntsSpliterator},
+ * {@code makeLongsSpliterator}, and {@code makeDoublesSpliterator}.
+ *
+ * This class is not public; it provides shared code to the public
+ * classes {@code AbstractSplittableRng}, {@code AbstractSharedRng},
+ * and {@code AbstractArbitrarilyJumpableRng}.
+ *
+ * @author Guy Steele
+ * @author Doug Lea
+ * @since 1.9
+ */
+
+abstract class AbstractSpliteratorRng implements Rng {
+ /*
+ * Implementation Overview.
+ *
+ * This class provides most of the "user API" methods needed to
+ * satisfy the interface java.util.Rng. An implementation of this
+ * interface need only extend this class and provide implementations
+ * of six methods: nextInt, nextLong, and nextDouble (the versions
+ * that take no arguments) and makeIntsSpliterator,
+ * makeLongsSpliterator, and makeDoublesSpliterator.
+ *
+ * File organization: First the non-public abstract methods needed
+ * to create spliterators, then the main public methods.
+ */
+
+ abstract Spliterator.OfInt makeIntsSpliterator(long index, long fence, int origin, int bound);
+ abstract Spliterator.OfLong makeLongsSpliterator(long index, long fence, long origin, long bound);
+ abstract Spliterator.OfDouble makeDoublesSpliterator(long index, long fence, double origin, double bound);
+
+ /* ---------------- public methods ---------------- */
+
+ // stream methods, coded in a way intended to better isolate for
+ // maintenance purposes the small differences across forms.
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number
+ * of pseudorandom {@code int} values from this generator and/or
+ * one split from it.
+ *
+ * @param streamSize the number of values to generate
+ * @return a stream of pseudorandom {@code int} values
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero
+ */
+ public IntStream ints(long streamSize) {
+ RngSupport.checkStreamSize(streamSize);
+ return StreamSupport.intStream
+ (makeIntsSpliterator(0L, streamSize, Integer.MAX_VALUE, 0),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandomly chosen
+ * {@code int} values.
+ *
+ * @implNote The implementation of this method is effectively
+ * equivalent to {@code ints(Long.MAX_VALUE)}.
+ *
+ * @return a stream of pseudorandomly chosen {@code int} values
+ */
+
+ public IntStream ints() {
+ return StreamSupport.intStream
+ (makeIntsSpliterator(0L, Long.MAX_VALUE, Integer.MAX_VALUE, 0),
+ false);
+ }
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number
+ * of pseudorandom {@code int} values from this generator and/or one split
+ * from it; each value conforms to the given origin (inclusive) and bound
+ * (exclusive).
+ *
+ * @param streamSize the number of values to generate
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code int} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero, or {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public IntStream ints(long streamSize, int randomNumberOrigin,
+ int randomNumberBound) {
+ RngSupport.checkStreamSize(streamSize);
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.intStream
+ (makeIntsSpliterator(0L, streamSize, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandom {@code
+ * int} values from this generator and/or one split from it; each value
+ * conforms to the given origin (inclusive) and bound (exclusive).
+ *
+ * @implNote This method is implemented to be equivalent to {@code
+ * ints(Long.MAX_VALUE, randomNumberOrigin, randomNumberBound)}.
+ *
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code int} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public IntStream ints(int randomNumberOrigin, int randomNumberBound) {
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.intStream
+ (makeIntsSpliterator(0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number
+ * of pseudorandom {@code long} values from this generator and/or
+ * one split from it.
+ *
+ * @param streamSize the number of values to generate
+ * @return a stream of pseudorandom {@code long} values
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero
+ */
+ public LongStream longs(long streamSize) {
+ RngSupport.checkStreamSize(streamSize);
+ return StreamSupport.longStream
+ (makeLongsSpliterator(0L, streamSize, Long.MAX_VALUE, 0L),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandom {@code
+ * long} values from this generator and/or one split from it.
+ *
+ * @implNote This method is implemented to be equivalent to {@code
+ * longs(Long.MAX_VALUE)}.
+ *
+ * @return a stream of pseudorandom {@code long} values
+ */
+ public LongStream longs() {
+ return StreamSupport.longStream
+ (makeLongsSpliterator(0L, Long.MAX_VALUE, Long.MAX_VALUE, 0L),
+ false);
+ }
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number of
+ * pseudorandom {@code long} values from this generator and/or one split
+ * from it; each value conforms to the given origin (inclusive) and bound
+ * (exclusive).
+ *
+ * @param streamSize the number of values to generate
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code long} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero, or {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public LongStream longs(long streamSize, long randomNumberOrigin,
+ long randomNumberBound) {
+ RngSupport.checkStreamSize(streamSize);
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.longStream
+ (makeLongsSpliterator(0L, streamSize, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandom {@code
+ * long} values from this generator and/or one split from it; each value
+ * conforms to the given origin (inclusive) and bound (exclusive).
+ *
+ * @implNote This method is implemented to be equivalent to {@code
+ * longs(Long.MAX_VALUE, randomNumberOrigin, randomNumberBound)}.
+ *
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code long} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public LongStream longs(long randomNumberOrigin, long randomNumberBound) {
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.longStream
+ (makeLongsSpliterator(0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number of
+ * pseudorandom {@code double} values from this generator and/or one split
+ * from it; each value is between zero (inclusive) and one (exclusive).
+ *
+ * @param streamSize the number of values to generate
+ * @return a stream of {@code double} values
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero
+ */
+ public DoubleStream doubles(long streamSize) {
+ RngSupport.checkStreamSize(streamSize);
+ return StreamSupport.doubleStream
+ (makeDoublesSpliterator(0L, streamSize, Double.MAX_VALUE, 0.0),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandom {@code
+ * double} values from this generator and/or one split from it; each value
+ * is between zero (inclusive) and one (exclusive).
+ *
+ * @implNote This method is implemented to be equivalent to {@code
+ * doubles(Long.MAX_VALUE)}.
+ *
+ * @return a stream of pseudorandom {@code double} values
+ */
+ public DoubleStream doubles() {
+ return StreamSupport.doubleStream
+ (makeDoublesSpliterator(0L, Long.MAX_VALUE, Double.MAX_VALUE, 0.0),
+ false);
+ }
+
+ /**
+ * Returns a stream producing the given {@code streamSize} number of
+ * pseudorandom {@code double} values from this generator and/or one split
+ * from it; each value conforms to the given origin (inclusive) and bound
+ * (exclusive).
+ *
+ * @param streamSize the number of values to generate
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code double} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code streamSize} is
+ * less than zero
+ * @throws IllegalArgumentException if {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public DoubleStream doubles(long streamSize, double randomNumberOrigin,
+ double randomNumberBound) {
+ RngSupport.checkStreamSize(streamSize);
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.doubleStream
+ (makeDoublesSpliterator(0L, streamSize, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+ /**
+ * Returns an effectively unlimited stream of pseudorandom {@code
+ * double} values from this generator and/or one split from it; each value
+ * conforms to the given origin (inclusive) and bound (exclusive).
+ *
+ * @implNote This method is implemented to be equivalent to {@code
+ * doubles(Long.MAX_VALUE, randomNumberOrigin, randomNumberBound)}.
+ *
+ * @param randomNumberOrigin the origin (inclusive) of each random value
+ * @param randomNumberBound the bound (exclusive) of each random value
+ * @return a stream of pseudorandom {@code double} values,
+ * each with the given origin (inclusive) and bound (exclusive)
+ * @throws IllegalArgumentException if {@code randomNumberOrigin}
+ * is greater than or equal to {@code randomNumberBound}
+ */
+ public DoubleStream doubles(double randomNumberOrigin, double randomNumberBound) {
+ RngSupport.checkRange(randomNumberOrigin, randomNumberBound);
+ return StreamSupport.doubleStream
+ (makeDoublesSpliterator(0L, Long.MAX_VALUE, randomNumberOrigin, randomNumberBound),
+ false);
+ }
+
+}