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Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* file and include the License file at packager/legal/LICENSE.txt.
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* GPL Classpath Exception:
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*
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// Portions Copyright [2018-2019] [Payara Foundation and/or its affiliates]
package com.sun.enterprise.universal;
/**
* Convert a nanosec duration into something readable
* @author bnevins
* Thread Safe.
* Immutable
*/
public final class NanoDuration {
// possibly useful constants
private static final double NSEC_PER_MICROSECOND = 1000;
private static final double NSEC_PER_MILLISECOND = 1000d * 1000;
private static final double NSEC_PER_SECOND = 1000d * 1000 * 1000;
private static final double NSEC_PER_MINUTE = 60d * 1000 * 1000 * 1000;
private double numSeconds = -1.0;
private double numMilliSeconds = -1.0;
private double numMicroSeconds = -1.0;
private double numNanoSeconds = -1.0;
private Duration duration;
public NanoDuration(long nsec) {
// if > 1 minute -- use Duration
if(nsec >= NSEC_PER_MINUTE) {
duration = new Duration(nsec / ((long)NSEC_PER_MILLISECOND));
return;
}
if((double) nsec >= NSEC_PER_SECOND) {
numSeconds = (double) nsec / NSEC_PER_SECOND;
} else if((double) nsec >= NSEC_PER_MILLISECOND) {
numMilliSeconds = (double) nsec / NSEC_PER_MILLISECOND;
} else if((double) nsec >= NSEC_PER_MICROSECOND) {
numMicroSeconds = (double) nsec / NSEC_PER_MICROSECOND;
} else {
numNanoSeconds = nsec; // not a double!
}
}
@Override
public String toString() {
if(duration != null)
return duration.toString();
final String fmt = "%.2f %s";
String s;
if(numSeconds > 0.0)
s = String.format(fmt, numSeconds, "seconds");
else if(numMilliSeconds > 0.0)
s = String.format(fmt, numMilliSeconds, "msec");
else if(numMicroSeconds > 0.0)
s = String.format(fmt, numMicroSeconds, "usec");
else if(numNanoSeconds > 0.0)
s = String.format(fmt, numNanoSeconds, "nsec");
else
s = String.format(fmt, 0.0, "nsec"); // unlikely!
return s;
}
}