55 lines
1.4 KiB
Java
55 lines
1.4 KiB
Java
/*
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* Copyright (C) 2010 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import java.util.Random;
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/**
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* Utility class for being able to seed a {@link Random} value with a passed in seed from a
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* benchmark parameter.
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*
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* <p>TODO: Remove this class once Caliper has a better way.
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*
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* @author Nicholaus Shupe
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*/
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public final class SpecialRandom extends Random {
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public static SpecialRandom valueOf(String s) {
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return (s.length() == 0) ? new SpecialRandom() : new SpecialRandom(Long.parseLong(s));
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}
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private final boolean hasSeed;
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private final long seed;
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public SpecialRandom() {
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this.hasSeed = false;
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this.seed = 0;
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}
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public SpecialRandom(long seed) {
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super(seed);
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this.hasSeed = true;
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this.seed = seed;
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}
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@Override
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public String toString() {
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return hasSeed ? "(seed:" + seed : "(default seed)";
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}
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private static final long serialVersionUID = 0;
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}
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