org.apache.commons.rng.simple.internal.Long2IntArray Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.rng.simple.internal;

import org.apache.commons.rng.core.source64.SplitMix64;

/**
 * Uses a {@code long} value to seed a {@link SplitMix64} RNG and
 * create a {@code int[]} with the requested number of random
 * values.
 *
 * @since 1.0
 */
public class Long2IntArray implements SeedConverter {
    /** Size of the output array. */
    private final int size;

    /**
     * @param size Size of the output array.
     */
    public Long2IntArray(int size) {
        this.size = size;
    }

    /** {@inheritDoc} */
    @Override
    public int[] convert(Long seed) {
        return SeedFactory.createIntArray(size, new SplitMix64(seed));
    }
}