| /* |
| * 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.uima.ducc.container.common; |
| |
| public class SynchronizedStats { |
| long num; |
| double sum; |
| double sumsqrs; |
| double min; |
| double max; |
| Object mux; |
| public SynchronizedStats() { |
| num = 0; |
| sum = 0; |
| sumsqrs = 0; |
| min = Double.MAX_VALUE; |
| max = Double.MIN_VALUE; |
| mux = new Object(); |
| } |
| public void addValue(double d) { |
| synchronized(mux) { |
| num++; |
| sum += d; |
| sumsqrs += d*d; |
| if (d < min) { |
| min = d; |
| } |
| if (d > max) { |
| max = d; |
| } |
| } |
| } |
| public long getNum() { |
| synchronized(mux) { |
| return num; |
| } |
| } |
| public double getSum() { |
| synchronized(mux) { |
| return sum; |
| } |
| } |
| public double getMax() { |
| synchronized(mux) { |
| return max; |
| } |
| } |
| public double getMin() { |
| synchronized(mux) { |
| return min; |
| } |
| } |
| public double getMean() { |
| synchronized(mux) { |
| if (num == 0 ) { |
| return Double.NaN; |
| } else { |
| return sum/num; |
| } |
| } |
| } |
| public double getStandardDeviation1() { |
| synchronized(mux) { |
| if ( num == 0 ) { |
| return Double.NaN; |
| } else { |
| return Math.sqrt((num*sumsqrs - sum*sum)/num); |
| } |
| } |
| } |
| //s = square root of[(sum of Xsquared -((sum of X)*(sum of X)/N))/(N-1)] |
| public double getStandardDeviation() { |
| synchronized(mux) { |
| if ( num == 0 ) { |
| return Double.NaN; |
| } else { |
| return Math.sqrt(((sumsqrs-(sum*sum)/num)/(num-1))); |
| } |
| } |
| } |
| |
| /** |
| * @param args |
| */ |
| public static void main(String[] args) { |
| SynchronizedStats s = new SynchronizedStats(); |
| s.addValue(1); |
| s.addValue(2); |
| s.addValue(3); |
| System.out.println("max:"+s.getMax()); |
| System.out.println("min:"+s.getMin()); |
| System.out.println("avg:"+s.getMean()); |
| System.out.println("dev:"+s.getStandardDeviation()); |
| } |
| } |