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Java example source code file (BitsStreamGeneratorTest.java)

This example Java source code file (BitsStreamGeneratorTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bitrandom, bitsstreamgeneratortest, override, randomgenerator, randomgeneratorabstracttest, suppresswarnings, testbitstreamgenerator, util

The BitsStreamGeneratorTest.java Java example source code

/*
 * 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.math3.random;

import java.util.Random;

/**
 * Test cases for the BitStreamGenerator class
 *
 */

public class BitsStreamGeneratorTest extends RandomGeneratorAbstractTest {

    public BitsStreamGeneratorTest() {
        super();
    }

    @Override
    protected RandomGenerator makeGenerator() {
        RandomGenerator generator = new TestBitStreamGenerator();
        generator.setSeed(1000);
        return generator;
    }

    /**
     * Test BitStreamGenerator using a Random as bit source.
     */
    static class TestBitStreamGenerator extends BitsStreamGenerator {

        private static final long serialVersionUID = 1L;
        private BitRandom ran = new BitRandom();

        @Override
        public void setSeed(int seed) {
           ran.setSeed(seed);
           clear();
        }

        @Override
        public void setSeed(int[] seed) {
            ran.setSeed(seed[0]);
        }

        @Override
        public void setSeed(long seed) {
            ran.setSeed((int) seed);

        }

        @Override
        protected int next(int bits) {
            return ran.nextBits(bits);
        }
    }

    /**
     * Extend Random to expose next(bits)
     */
    @SuppressWarnings("serial")
    static class BitRandom extends Random {
        public BitRandom() {
            super();
        }
        public int nextBits(int bits) {
            return next(bits);
        }
    }

}

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