/
SpecialRandom.java
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/
SpecialRandom.java
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/*
* Copyright (C) 2010 The Guava Authors
*
* 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.
*/
package com.google.common.collect;
import java.util.Random;
/**
* Utility class for being able to seed a {@link Random} value with a passed in seed from a
* benchmark parameter.
*
* <p>TODO: Remove this class once Caliper has a better way.
*
* @author Nicholaus Shupe
*/
public final class SpecialRandom extends Random {
public static SpecialRandom valueOf(String s) {
return (s.length() == 0) ? new SpecialRandom() : new SpecialRandom(Long.parseLong(s));
}
private final boolean hasSeed;
private final long seed;
public SpecialRandom() {
this.hasSeed = false;
this.seed = 0;
}
public SpecialRandom(long seed) {
super(seed);
this.hasSeed = true;
this.seed = seed;
}
@Override
public String toString() {
return hasSeed ? "(seed:" + seed : "(default seed)";
}
private static final long serialVersionUID = 0;
}