/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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 net.ontopia.utils;
import java.util.ArrayList;
/**
* INTERNAL: Store a set a time samples for easier calculation of
* minimum, maximum and average times.
*/
public class TimeSamples {
private ArrayList timeSample = new ArrayList();
/**
* INTERNAL: Add sample time to set.
*/
public void addTime(double timeInSecs) {
if (timeInSecs < 0.0)
throw new IllegalArgumentException("Can't add negative amount of time to set!");
timeSample.add(new Double(timeInSecs));
}
/**
* INTERNAL: Get average sample time in seconds.
*/
public double getAverageTime() {
double sum = 0.0;
if (timeSample.size() <= 0)
return 0.0;
for (int i=0; i < timeSample.size(); i++) {
sum += ((Double)timeSample.get(i)).doubleValue();
}
double avg = sum / timeSample.size();
// Limit result to 3 digits after commata (which represents precision)
return Math.round(avg * 1000.0) / 1000.0;
}
/**
* INTERNAL: Get maximum sampled time in seconds.
*/
public double getMinimumTime() {
double min = Double.MAX_VALUE;
for (int i=0; i < timeSample.size(); i++) {
double actVal = ((Double)timeSample.get(i)).doubleValue();
if (actVal < min)
min = actVal;
}
return min;
}
/**
* INTERNAL: Get minimum sampled time in seconds.
*/
public double getMaximumTime() {
double max = 0.0;
for (int i=0; i < timeSample.size(); i++) {
double actVal = ((Double)timeSample.get(i)).doubleValue();
if (actVal > max)
max = actVal;
}
return max;
}
}