| /** |
| * 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.yarn.server.timelineservice.storage.common; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Encapsulates a range with start and end indices. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class Range { |
| private final int startIdx; |
| private final int endIdx; |
| |
| /** |
| * Defines a range from start index (inclusive) to end index (exclusive). |
| * |
| * @param start |
| * Starting index position |
| * @param end |
| * Ending index position (exclusive) |
| */ |
| public Range(int start, int end) { |
| if (start < 0 || end < start) { |
| throw new IllegalArgumentException( |
| "Invalid range, required that: 0 <= start <= end; start=" + start |
| + ", end=" + end); |
| } |
| |
| this.startIdx = start; |
| this.endIdx = end; |
| } |
| |
| public int start() { |
| return startIdx; |
| } |
| |
| public int end() { |
| return endIdx; |
| } |
| |
| public int length() { |
| return endIdx - startIdx; |
| } |
| } |