| /** |
| * 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.hadoop.fs.slive; |
| |
| import java.util.Random; |
| |
| /** |
| * Class that represents a numeric minimum and a maximum |
| * |
| * @param <T> |
| * the type of number being used |
| */ |
| class Range<T extends Number> { |
| |
| private static final String SEP = ","; |
| |
| private T min; |
| private T max; |
| |
| Range(T min, T max) { |
| this.min = min; |
| this.max = max; |
| } |
| |
| /** |
| * @return the minimum value |
| */ |
| T getLower() { |
| return min; |
| } |
| |
| /** |
| * @return the maximum value |
| */ |
| T getUpper() { |
| return max; |
| } |
| |
| public String toString() { |
| return min + SEP + max; |
| } |
| |
| /** |
| * Gets a long number between two values |
| * |
| * @param rnd |
| * @param range |
| * |
| * @return long |
| */ |
| static long betweenPositive(Random rnd, Range<Long> range) { |
| if (range.getLower().equals(range.getUpper())) { |
| return range.getLower(); |
| } |
| long nextRnd = rnd.nextLong(); |
| long normRange = (range.getUpper() - range.getLower() + 1); |
| return Math.abs(nextRnd % normRange) + range.getLower(); |
| } |
| |
| } |