mirror of https://github.com/octoleo/plantuml.git
245 lines
6.0 KiB
Java
245 lines
6.0 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License aint with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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package net.sourceforge.plantuml.api;
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import java.util.StringTokenizer;
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import java.util.concurrent.locks.Lock;
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import java.util.concurrent.locks.ReentrantLock;
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import java.util.prefs.Preferences;
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import net.sourceforge.plantuml.log.Logme;
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import net.sourceforge.plantuml.utils.Log;
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public class NumberAnalyzed implements INumberAnalyzed {
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private static final int SLIDING_WINDOW = 1024;
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private long nb;
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private long sum;
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private long min;
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private long max;
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private long sumOfSquare;
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// See https://fossies.org/linux/haproxy/include/proto/freq_ctr.h
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private long sliddingSum;
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private final String name;
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private final Lock saveLock = new ReentrantLock();
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public NumberAnalyzed(String name) {
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this.name = name;
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}
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public synchronized void reset() {
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this.nb = 0;
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this.sum = 0;
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this.min = 0;
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this.max = 0;
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this.sumOfSquare = 0;
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this.sliddingSum = 0;
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}
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public NumberAnalyzed() {
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this("");
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}
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public final void save(Preferences prefs) {
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if (name.length() == 0) {
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throw new UnsupportedOperationException();
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}
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if (saveLock.tryLock())
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try {
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prefs.put(name + ".saved", getSavedString());
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} finally {
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saveLock.unlock();
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}
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}
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private String getSavedString() {
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final long nb1;
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final long sum1;
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final long min1;
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final long max1;
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final long sumOfSquare1;
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final long sliddingSum1;
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final String supp1;
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synchronized (this) {
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nb1 = nb;
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sum1 = sum;
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min1 = min;
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max1 = max;
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sumOfSquare1 = sumOfSquare;
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sliddingSum1 = sliddingSum;
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}
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supp1 = getSavedSupplementatyData();
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return longToString(nb1) + ";" + longToString(sum1) + ";" + longToString(min1) + ";" + longToString(max1) + ";"
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+ longToString(sumOfSquare1) + ";" + longToString(sliddingSum1) + ";" + supp1 + ";";
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}
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protected String getSavedSupplementatyData() {
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return "";
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}
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protected final String longToString(long val) {
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return Long.toString(val, 36);
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}
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public static NumberAnalyzed load(String name, Preferences prefs) {
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final String value = prefs.get(name + ".saved", "");
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if (value.length() == 0) {
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Log.info("Cannot load " + name);
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return null;
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}
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try {
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final StringTokenizer st = new StringTokenizer(value, ";");
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return new NumberAnalyzed(name, Long.parseLong(st.nextToken(), 36), Long.parseLong(st.nextToken(), 36),
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Long.parseLong(st.nextToken(), 36), Long.parseLong(st.nextToken(), 36), Long.parseLong(
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st.nextToken(), 36), Long.parseLong(st.nextToken(), 36));
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} catch (Exception e) {
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Logme.error(e);
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Log.info("Error reading " + value);
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return null;
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}
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}
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@Override
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public synchronized String toString() {
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return "sum=" + sum + " nb=" + nb + " min=" + min + " max=" + max + " mean=" + getMean();
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}
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protected NumberAnalyzed(String name, long nb, long sum, long min, long max, long sumOfSquare, long sliddingSum) {
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this(name);
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this.nb = nb;
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this.sum = sum;
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this.min = min;
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this.max = max;
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this.sumOfSquare = sumOfSquare;
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this.sliddingSum = sliddingSum;
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}
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public synchronized INumberAnalyzed getCopyImmutable() {
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final NumberAnalyzed copy = new NumberAnalyzed(name, nb, sum, min, max, sumOfSquare, sliddingSum);
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return copy;
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}
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public synchronized void addValue(long v) {
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nb++;
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if (nb == 1) {
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min = v;
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max = v;
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} else if (v > max) {
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max = v;
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} else if (v < min) {
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min = v;
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}
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sum += v;
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sumOfSquare += v * v;
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sliddingSum = sliddingSum * (SLIDING_WINDOW - 1) / SLIDING_WINDOW + v;
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}
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public void add(NumberAnalyzed other) {
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final long nb1;
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final long sum1;
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final long min1;
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final long max1;
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final long sumOfSquare1;
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final long sliddingSum1;
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synchronized (other) {
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nb1 = other.nb;
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sum1 = other.sum;
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min1 = other.min;
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max1 = other.max;
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sumOfSquare1 = other.sumOfSquare;
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sliddingSum1 = other.sliddingSum;
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}
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synchronized (this) {
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this.sum += sum1;
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this.nb += nb1;
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this.min = Math.min(this.min, min1);
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this.max = Math.max(this.max, max1);
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this.sumOfSquare += sumOfSquare1;
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// Not good!
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this.sliddingSum += sliddingSum1;
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}
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}
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synchronized public final long getNb() {
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return nb;
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}
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synchronized public final long getSum() {
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return sum;
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}
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synchronized public final long getMin() {
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return min;
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}
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synchronized public final long getMax() {
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return max;
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}
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synchronized public final long getMean() {
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if (nb == 0) {
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return 0;
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}
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return sum / nb;
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}
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synchronized public final long getSliddingMean() {
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if (nb == 0) {
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return 0;
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}
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if (nb < SLIDING_WINDOW) {
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return sum / nb;
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}
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return sliddingSum / nb;
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}
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public final long getStandardDeviation() {
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final long sum1;
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final long sumOfSquare1;
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final long nb1;
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synchronized (this) {
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sum1 = this.sum;
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sumOfSquare1 = this.sumOfSquare;
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nb1 = this.nb;
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}
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if (nb1 == 0) {
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return 0;
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}
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final long mean = sum1 / nb1;
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return Math.round(Math.sqrt(sumOfSquare1 / nb1 - mean * mean));
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}
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final public String getName() {
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return name;
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}
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}
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