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/*
* Units of Measurement Implementation for Java SE
* Copyright (c) 2005-2018, Jean-Marie Dautelle, Werner Keil, Otavio Santana.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of JSR-363 nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package tec.uom.se.function;
import java.util.Objects;
import java.util.function.BinaryOperator;
import javax.measure.Quantity;
import javax.measure.Unit;
import tec.uom.se.quantity.Quantities;
/**
* @author Otavio
* @author Werner
* @version 1.0
* @since 1.0
* @param
*/
public class QuantitySummaryStatistics> {
private final Quantity empty;
private long count;
private Quantity min;
private Quantity max;
private Quantity sum;
private Quantity average;
private final BinaryOperator> minFunctions = QuantityFunctions.min();
private final BinaryOperator> maxFunctions = QuantityFunctions.max();
/**
* Creates a new instance, targeting the given {@link javax.measure.Unit}.
*
* @param unit
* the target unit, not null.
*/
QuantitySummaryStatistics(Unit unit) {
empty = Quantities.getQuantity(0, unit);
setQuantity(empty);
}
/**
* Records another value into the summary information.
*
* @param quantity
* the input quantity value to be added, not null.
*/
public void accept(Quantity quantity) {
Objects.requireNonNull(quantity);
if (isEmpty()) {
setQuantity(quantity.to(empty.getUnit()));
count++;
} else {
doSummary(quantity.to(empty.getUnit()));
}
}
/**
* Combines the state of another {@code QuantitySummaryStatistics} into this one.
*
* @param quantitySummary
* another {@code QuantitySummaryStatistics}, not null.
*/
public QuantitySummaryStatistics combine(QuantitySummaryStatistics quantitySummary) {
Objects.requireNonNull(quantitySummary);
if (!equals(quantitySummary)) {
return this;
}
min = minFunctions.apply(min, quantitySummary.min.to(empty.getUnit()));
max = maxFunctions.apply(max, quantitySummary.max.to(empty.getUnit()));
sum = sum.add(quantitySummary.sum);
count += quantitySummary.count;
average = sum.divide(count);
return this;
}
private void doSummary(Quantity moneraty) {
min = minFunctions.apply(min, moneraty);
max = maxFunctions.apply(max, moneraty);
sum = sum.add(moneraty);
average = sum.divide(++count);
}
private boolean isEmpty() {
return count == 0;
}
private void setQuantity(Quantity quantity) {
min = quantity;
max = quantity;
sum = quantity;
average = quantity;
}
/**
* Get the number of items added to this summary instance.
*
* @return the number of summarized items, >= 0.
*/
public long getCount() {
return count;
}
/**
* Get the minimal quantity found within this summary.
*
* @return the minimal quantity
*/
public Quantity getMin() {
return min;
}
/**
* Get the minimal quantity found within this summary converted to unit
*
* @param unit
* to convert
* @return the minimal quantity converted to this unit
*/
public Quantity getMin(Unit unit) {
return min.to(unit);
}
/**
* Get the maximal amount found within this summary.
*
* @return the maximal quantity
*/
public Quantity getMax() {
return max;
}
/**
* Get the maximal amount found within this summary converted to unit
*
* @param unit
* to convert
* @return the maximal quantity converted to this unit
*/
public Quantity getMax(Unit unit) {
return max.to(unit);
}
/**
* Get the sum of all amounts within this summary.
*
* @return the total amount
*/
public Quantity getSum() {
return sum;
}
/**
* Get the sum of all amounts within this summary converted to unit
*
* @param unit
* to convert
* @return the total amount converted to this unit
*/
public Quantity getSum(Unit unit) {
return sum.to(unit);
}
/**
* Get the quantity average of all amounts added.
*
* @return the quantity average quantity
*/
public Quantity getAverage() {
return average;
}
/**
* Get the quantity average of all amounts added converted to unit
*
* @param unit
* to convert
* @return the average quantity converted to this unit
*/
public Quantity getAverage(Unit unit) {
return average.to(unit);
}
/**
* convert the summary to this unit measure
*
* @param unit
* to convert the summary
* @return the summary converted to this unit
*/
public QuantitySummaryStatistics to(Unit unit) {
QuantitySummaryStatistics summary = new QuantitySummaryStatistics<>(unit);
summary.average = average.to(unit);
summary.count = count;
summary.max = max.to(unit);
summary.min = min.to(unit);
summary.sum = sum.to(unit);
return summary;
}
/**
* will equals when the unit were equals
*/
@Override
public boolean equals(Object obj) {
if (QuantitySummaryStatistics.class.isInstance(obj)) {
@SuppressWarnings("rawtypes")
QuantitySummaryStatistics other = QuantitySummaryStatistics.class.cast(obj);
return Objects.equals(empty.getUnit(), other.empty.getUnit());
}
return false;
}
@Override
public int hashCode() {
return empty.getUnit().hashCode();
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("[currency: ").append(empty.getUnit()).append(",");
sb.append("count:").append(count).append(",");
sb.append("min:").append(min).append(",");
sb.append("max:").append(max).append(",");
sb.append("sum:").append(sum).append(",");
sb.append("average:").append(average).append("]");
return sb.toString();
}
}