/*
* This file is part of LibrePlan
*
* Copyright (C) 2009-2010 Fundación para o Fomento da Calidade Industrial e
* Desenvolvemento Tecnolóxico de Galicia
* 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.business.planner.entities;
import java.util.Collection;
import java.util.List;
import org.joda.time.LocalDate;
import org.libreplan.business.calendars.entities.AvailabilityTimeLine;
import org.libreplan.business.calendars.entities.ResourceCalendar;
import org.libreplan.business.resources.entities.Criterion;
import org.libreplan.business.resources.entities.CriterionSatisfaction;
import org.libreplan.business.resources.entities.Resource;
/**
* @author Óscar González Fernández <ogonzalez@igalia.com>
*
*/
public class AvailabilityCalculator {
private AvailabilityCalculator() {
}
public static AvailabilityTimeLine getCalendarAvailabilityFor(
Resource resource) {
ResourceCalendar resourceCalendar = resource.getCalendar();
return resourceCalendar != null ? resourceCalendar.getAvailability()
: AvailabilityTimeLine.allValid();
}
public static AvailabilityTimeLine buildSumOfAvailabilitiesFor(
Collection<? extends Criterion> criterions, List<Resource> resources) {
AvailabilityTimeLine result = AvailabilityTimeLine.createAllInvalid();
for (Resource each : resources) {
result = result.or(AvailabilityCalculator.availabilityFor(
criterions, each));
}
return result;
}
public static AvailabilityTimeLine availabilityFor(
Collection<? extends Criterion> criterions, Resource each) {
AvailabilityTimeLine result = AvailabilityTimeLine.allValid();
result = result.and(getCalendarAvailabilityFor(each));
return result.and(getCriterionsAvailabilityFor(criterions, each));
}
public static AvailabilityTimeLine getCriterionsAvailabilityFor(
Collection<? extends Criterion> criterions, Resource resource) {
AvailabilityTimeLine result = AvailabilityTimeLine.allValid();
for (Criterion each : criterions) {
result = result.and(buildTimeline(resource
.getSatisfactionsFor(each)));
}
return result;
}
private static AvailabilityTimeLine buildTimeline(
List<CriterionSatisfaction> satisfactions) {
if (satisfactions.isEmpty()) {
return AvailabilityTimeLine.createAllInvalid();
}
AvailabilityTimeLine result = AvailabilityTimeLine.allValid();
LocalDate previousEnd = null;
for (CriterionSatisfaction each : satisfactions) {
LocalDate startDate = each.getStartDate();
assert startDate != null : "satisfactions start date is not null";
if (previousEnd == null) {
result.invalidUntil(startDate);
} else {
result.invalidAt(previousEnd, startDate);
}
previousEnd = each.getEndDate();
if (previousEnd == null) {
break;
}
}
if (previousEnd != null) {
result.invalidFrom(previousEnd);
}
return result;
}
}