SecureGenerateRandom.java

/*
 * Encog(tm) Core v3.4 - Java Version
 * http://www.heatonresearch.com/encog/
 * https://github.com/encog/encog-java-core
 
 * Copyright 2008-2016 Heaton Research, Inc.
 *
 * Licensed 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.
 *   
 * For more information on Heaton Research copyrights, licenses 
 * and trademarks visit:
 * http://www.heatonresearch.com/copyright
 */
package org.encog.mathutil.randomize.generate;

import java.security.SecureRandom;
import java.util.Random;

/**
 * A wrapper over Java's crypto secure random number generator.
 */
public class SecureGenerateRandom extends AbstractGenerateRandom {

    /**
     * The underlying random number generator.
     */
    private final Random rand;

    /**
     * Construct the random number generator.
     *
     * @param seed The seed.
     */
    public SecureGenerateRandom(final long seed) {
        final byte[] s = {(byte) seed};
        this.rand = new SecureRandom(s);
    }

    /**
     * Construct with a time-based seed.
     */
    public SecureGenerateRandom() {
        this.rand = new SecureRandom();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int nextInt() {
        return this.rand.nextInt();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double nextDouble() {
        return this.rand.nextDouble();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public float nextFloat() {
        return this.rand.nextFloat();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public long nextLong() {
        return this.rand.nextLong();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean nextBoolean() {
        return this.rand.nextBoolean();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double nextGaussian() {
        return this.rand.nextGaussian();
    }
}