| /* |
| * 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.api.records.timelineservice; |
| |
| import org.apache.hadoop.yarn.exceptions.YarnRuntimeException; |
| |
| /** |
| * A calculator for timeline metrics. |
| */ |
| public final class TimelineMetricCalculator { |
| |
| private TimelineMetricCalculator() { |
| // do nothing. |
| } |
| |
| /** |
| * Compare two not-null numbers. |
| * @param n1 Number n1 |
| * @param n2 Number n2 |
| * @return 0 if n1 equals n2, a negative int if n1 is less than n2, a |
| * positive int otherwise. |
| */ |
| public static int compare(Number n1, Number n2) { |
| if (n1 == null || n2 == null) { |
| throw new YarnRuntimeException( |
| "Number to be compared shouldn't be null."); |
| } |
| |
| if (n1 instanceof Integer || n1 instanceof Long) { |
| if (n1.longValue() == n2.longValue()) { |
| return 0; |
| } else { |
| return (n1.longValue() < n2.longValue()) ? -1 : 1; |
| } |
| } |
| |
| if (n1 instanceof Float || n1 instanceof Double) { |
| if (n1.doubleValue() == n2.doubleValue()) { |
| return 0; |
| } else { |
| return (n1.doubleValue() < n2.doubleValue()) ? -1 : 1; |
| } |
| } |
| |
| // TODO throw warnings/exceptions for other types of number. |
| throw new YarnRuntimeException("Unsupported types for number comparison: " |
| + n1.getClass().getName() + ", " + n2.getClass().getName()); |
| } |
| |
| /** |
| * Subtract operation between two Numbers. |
| * @param n1 Number n1 |
| * @param n2 Number n2 |
| * @return Number represent to (n1 - n2). |
| */ |
| public static Number sub(Number n1, Number n2) { |
| if (n1 == null) { |
| throw new YarnRuntimeException( |
| "Number to be subtracted shouldn't be null."); |
| } else if (n2 == null) { |
| return n1; |
| } |
| |
| if (n1 instanceof Integer || n1 instanceof Long) { |
| return n1.longValue() - n2.longValue(); |
| } |
| |
| if (n1 instanceof Float || n1 instanceof Double) { |
| return n1.doubleValue() - n2.doubleValue(); |
| } |
| |
| // TODO throw warnings/exceptions for other types of number. |
| return null; |
| } |
| |
| /** |
| * Sum up two Numbers. |
| * @param n1 Number n1 |
| * @param n2 Number n2 |
| * @return Number represent to (n1 + n2). |
| */ |
| public static Number sum(Number n1, Number n2) { |
| if (n1 == null) { |
| return n2; |
| } else if (n2 == null) { |
| return n1; |
| } |
| |
| if (n1 instanceof Integer || n1 instanceof Long) { |
| return n1.longValue() + n2.longValue(); |
| } |
| |
| if (n1 instanceof Float || n1 instanceof Double) { |
| return n1.doubleValue() + n2.doubleValue(); |
| } |
| |
| // TODO throw warnings/exceptions for other types of number. |
| return null; |
| } |
| } |