Java PrimitiveIterator.OfLong方法代碼示例

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
/**
 * Returns an infinite sequential ordered {@code LongStream} produced by iterative
 * application of a function {@code f} to an initial element {@code seed},
 * producing a {@code Stream} consisting of {@code seed}, {@code f(seed)},
 * {@code f(f(seed))}, etc.
 *
 * <p>The first element (position {@code 0}) in the {@code LongStream} will
 * be the provided {@code seed}.  For {@code n > 0}, the element at position
 * {@code n}, will be the result of applying the function {@code f} to the
 * element at position {@code n - 1}.
 *
 * @param seed the initial element
 * @param f a function to be applied to to the previous element to produce
 *          a new element
 * @return a new sequential {@code LongStream}
 */
public static LongStream iterate(final long seed, final LongUnaryOperator f) {
    Objects.requireNonNull(f);
    final PrimitiveIterator.OfLong iterator = new PrimitiveIterator.OfLong() {
        long t = seed;

        @Override
        public boolean hasNext() {
            return true;
        }

        @Override
        public long nextLong() {
            long v = t;
            t = f.applyAsLong(t);
            return v;
        }
    };
    return StreamSupport.longStream(Spliterators.spliteratorUnknownSize(
            iterator,
            Spliterator.ORDERED | Spliterator.IMMUTABLE | Spliterator.NONNULL), false);
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
public void testLongForEachRemainingWithNull() {
    PrimitiveIterator.OfLong i = new PrimitiveIterator.OfLong() {
        @Override
        public long nextLong() {
            return 0;
        }

        @Override
        public boolean hasNext() {
            return false;
        }
    };

    executeAndCatch(() -> i.forEachRemaining((LongConsumer) null));
    executeAndCatch(() -> i.forEachRemaining((Consumer<Long>) null));
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
public void testLongForEachRemainingWithNull() {
    PrimitiveIterator.OfLong i = new PrimitiveIterator.OfLong() {
        @Override
        public long nextLong() {
            return 0;
        }

        @Override
        public boolean hasNext() {
            return false;
        }
    };

    assertThrowsNPE(() -> i.forEachRemaining((LongConsumer) null));
    assertThrowsNPE(() -> i.forEachRemaining((Consumer<Long>) null));
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
/**
 * Returns a primitive iterator for this range
 * @return  the primitive iterator
 */
private PrimitiveIterator.OfLong iteratorOfLong() {
    return new PrimitiveIterator.OfLong() {
        private long value = start;
        @Override
        public boolean hasNext() {
            if (excludes != null) {
                while (excludes.test(value) && inBounds(value)) {
                    value = ascend ? value + step : value - step;
                }
            }
            return inBounds(value);
        }
        @Override
        public long nextLong() {
            final long next = value;
            value = ascend ? value + step : value - step;
            return next;
        }
    };
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
PrimitiveIterator.OfLong iteratorVarLong(final int len) {
    return new PrimitiveIterator.OfLong() {
        private int i;
        private long x;
        @Override
        public boolean hasNext() {
            return i < len;
        }
        @Override
        public long nextLong() {
            remapIfNeeded();
            x += readVarLong(buff);
            return x;
        }
    };
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
private Node.OfLong degenerateTree(PrimitiveIterator.OfLong it) {
    if (!it.hasNext()) {
        return Nodes.node(new long[0]);
    }

    long i = it.nextLong();
    if (it.hasNext()) {
        return new Nodes.ConcNode.OfLong(Nodes.node(new long[] {i}), degenerateTree(it));
    }
    else {
        return Nodes.node(new long[] {i});
    }
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
@Override
public final PrimitiveIterator.OfLong iterator() {
    return Spliterators.iterator(spliterator());
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
@Override
public PrimitiveIterator.OfLong iterator() {
    return Spliterators.iterator(spliterator());
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
@Override
PrimitiveIterator.OfLong iterator();
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
@Override
public PrimitiveIterator.OfLong iterator() {
    return s.iterator();
}
 

import java.util.PrimitiveIterator; //導入方法依賴的package包/類
/**
 * {@inheritDoc}
 */
@Override
public PrimitiveIterator.OfLong iterator() {
    return pipeline.execute(LongIteratorTerminator.create(pipeline, parallel));
}