/*
* This file is part of LibrePlan
*
* Copyright (C) 2010-2011 Igalia, S.L.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.libreplan.web.montecarlo;
import java.math.BigDecimal;
import java.math.MathContext;
import java.math.RoundingMode;
import org.apache.commons.lang.Validate;
import org.joda.time.Days;
import org.joda.time.LocalDate;
import org.libreplan.business.calendars.entities.BaseCalendar;
import org.libreplan.business.planner.entities.Task;
import org.libreplan.business.workingday.EffortDuration;
import org.libreplan.business.workingday.IntraDayDate.PartialDay;
/**
*
* @author Diego Pino Garcia<dpino@igalia.com>
*
*/
public class MonteCarloTask {
public static MonteCarloTask create(Task task) {
return new MonteCarloTask(task);
}
public static MonteCarloTask copy(MonteCarloTask task) {
return new MonteCarloTask(task);
}
public static BigDecimal calculateRealDurationFor(MonteCarloTask task, BigDecimal daysDuration) {
LocalDate start = task.getStartDate();
Validate.notNull(start);
LocalDate end = calculateEndDateFor(task, daysDuration);
Days daysBetween = Days.daysBetween(start, end);
return BigDecimal.valueOf(daysBetween.getDays());
}
private static LocalDate calculateEndDateFor(MonteCarloTask task, BigDecimal daysDuration) {
BaseCalendar calendar = task.getCalendar();
LocalDate start = new LocalDate(task.getStartDate());
LocalDate day = start;
double duration = daysDuration.doubleValue();
for (int i = 0; i < duration;) {
EffortDuration workableTime = calendar.getCapacityOn(PartialDay
.wholeDay(day));
if (!EffortDuration.zero().equals(workableTime)) {
i++;
}
day = day.plusDays(1);
}
return day;
}
private Task task;
private BigDecimal duration;
private BigDecimal pessimisticDuration;
private Integer pessimisticDurationPercentage;
private BigDecimal normalDuration;
private Integer normalDurationPercentage;
private BigDecimal optimisticDuration;
private Integer optimisticDurationPercentage;
private MonteCarloTask(Task task) {
this.task = task;
duration = BigDecimal.valueOf(task.getWorkableDays());
pessimisticDuration = duration.multiply(BigDecimal.valueOf(1.50));
pessimisticDurationPercentage = 30;
normalDuration = duration;
normalDurationPercentage = 50;
optimisticDuration = duration.multiply(BigDecimal.valueOf(0.50));
optimisticDurationPercentage = 20;
}
private MonteCarloTask(MonteCarloTask task) {
this.task = task.getTask();
this.duration = task.getDuration();
this.pessimisticDuration = task.getPessimisticDuration();
this.pessimisticDurationPercentage = task.getPessimisticDurationPercentage();
this.normalDuration = task.getNormalDuration();
this.normalDurationPercentage = task.getNormalDurationPercentage();
this.optimisticDuration = task.getOptimisticDuration();
this.optimisticDurationPercentage = task.getOptimisticDurationPercentage();
}
public Task getTask() {
return task;
}
public LocalDate getStartDate() {
return task.getStartAsLocalDate();
}
private BaseCalendar getCalendar() {
return task.getCalendar();
}
public String getTaskName() {
return task.getName();
}
public BigDecimal getDuration() {
return duration;
}
public BigDecimal getPessimisticDuration() {
return pessimisticDuration;
}
public Integer getPessimisticDurationPercentage() {
return pessimisticDurationPercentage;
}
public BigDecimal getNormalDuration() {
return normalDuration;
}
public Integer getNormalDurationPercentage() {
return normalDurationPercentage;
}
public BigDecimal getOptimisticDuration() {
return optimisticDuration;
}
public Integer getOptimisticDurationPercentage() {
return optimisticDurationPercentage;
}
public void setDuration(BigDecimal duration) {
this.duration = duration;
}
public void setPessimisticDuration(BigDecimal pessimisticDuration) {
this.pessimisticDuration = pessimisticDuration;
}
public void setPessimisticDurationPercentage(
Integer pessimisticDurationPercentage) {
this.pessimisticDurationPercentage = pessimisticDurationPercentage;
}
public void setNormalDuration(BigDecimal normalDuration) {
this.normalDuration = normalDuration;
}
public void setNormalDurationPercentage(Integer normalDurationPercentage) {
this.normalDurationPercentage = normalDurationPercentage;
}
public void setOptimisticDuration(BigDecimal optimisticDuration) {
this.optimisticDuration = optimisticDuration;
}
public void setOptimisticDurationPercentage(
Integer optimisticDurationPercentage) {
this.optimisticDurationPercentage = optimisticDurationPercentage;
}
public String toString() {
return String.format("%s:%f:(%f,%d):(%f,%d):(%f,%d)", task.getName(),
duration, pessimisticDuration, pessimisticDurationPercentage,
normalDuration, normalDurationPercentage, optimisticDuration,
optimisticDurationPercentage);
}
public String getOrderName() {
return task.getOrderElement().getOrder().getName();
}
public BigDecimal getPessimisticDurationPercentageLowerLimit() {
return BigDecimal.ZERO;
}
private static final MathContext mathContext = new MathContext(2,
RoundingMode.HALF_UP);
public BigDecimal getPessimisticDurationPercentageUpperLimit() {
return BigDecimal.valueOf(pessimisticDurationPercentage).divide(
BigDecimal.valueOf(100), mathContext);
}
public BigDecimal getNormalDurationPercentageLowerLimit() {
return getPessimisticDurationPercentageUpperLimit();
}
public BigDecimal getNormalDurationPercentageUpperLimit() {
BigDecimal result = BigDecimal.valueOf(pessimisticDurationPercentage
+ normalDurationPercentage);
return result.divide(BigDecimal.valueOf(100), mathContext);
}
public BigDecimal getOptimisticDurationPercentageLowerLimit() {
return getNormalDurationPercentageUpperLimit();
}
public BigDecimal getOptimisticDurationPercentageUpperLimit() {
return BigDecimal.ONE;
}
}