/*
GanttProject is an opensource project management tool.
Copyright (C) 2004-2011 GanttProject team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package net.sourceforge.ganttproject.task.algorithm;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import biz.ganttproject.core.time.GanttCalendar;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskContainmentHierarchyFacade;
import net.sourceforge.ganttproject.task.TaskMutator;
import net.sourceforge.ganttproject.task.dependency.TaskDependencyException;
/**
* @author bard
*/
public abstract class AdjustTaskBoundsAlgorithm extends AlgorithmBase {
public void run(Task task) {
run(new Task[] { task });
}
public void run(Task[] tasks) {
run(Arrays.asList(tasks));
}
@Override
protected boolean isEnabled() {
return false;
}
public void run(Collection<Task> tasks) {
if (!isEnabled()) {
return;
}
AlgorithmImpl algorithmImpl = new AlgorithmImpl();
algorithmImpl.run(tasks);
}
public void adjustNestedTasks(Task supertask) throws TaskDependencyException {
if (!isEnabled()) {
return;
}
TaskContainmentHierarchyFacade containmentFacade = createContainmentFacade();
List<Task> nestedTasks = new ArrayList<Task>(Arrays.asList(containmentFacade.getNestedTasks(supertask)));
if (nestedTasks.size() == 0) {
return;
}
SortTasksAlgorithm sortAlgorithm = new SortTasksAlgorithm();
sortAlgorithm.sortTasksByStartDate(nestedTasks);
Set<Task> modifiedTasks = new HashSet<Task>();
for (Task nestedTask : nestedTasks) {
if (nestedTask.getStart().getTime().before(supertask.getStart().getTime())) {
TaskMutator mutator = nestedTask.createMutatorFixingDuration();
mutator.setStart(supertask.getStart());
mutator.commit();
modifiedTasks.add(nestedTask);
}
if (nestedTask.getEnd().getTime().after(supertask.getEnd().getTime())) {
TaskMutator mutator = nestedTask.createMutatorFixingDuration();
mutator.shift(supertask.getManager().createLength(supertask.getDuration().getTimeUnit(),
nestedTask.getEnd().getTime(), supertask.getEnd().getTime()));
mutator.commit();
modifiedTasks.add(nestedTask);
}
}
run(modifiedTasks.toArray(new Task[0]));
RecalculateTaskScheduleAlgorithm alg = new RecalculateTaskScheduleAlgorithm(this) {
@Override
protected TaskContainmentHierarchyFacade createContainmentFacade() {
return AdjustTaskBoundsAlgorithm.this.createContainmentFacade();
}
};
alg.run(modifiedTasks);
}
protected abstract TaskContainmentHierarchyFacade createContainmentFacade();
private class AlgorithmImpl {
private Set<Task> myModifiedTasks = new HashSet<Task>();
public void run(Collection<Task> tasks) {
HashSet<Task> taskSet = new HashSet<Task>(tasks);
myModifiedTasks.addAll(taskSet);
TaskContainmentHierarchyFacade containmentFacade = createContainmentFacade();
while (!taskSet.isEmpty()) {
recalculateSupertaskScheduleBottomUp(taskSet, containmentFacade);
taskSet.clear();
for (Task modifiedTask : myModifiedTasks) {
Task supertask = containmentFacade.getContainer(modifiedTask);
if (supertask != null) {
taskSet.add(supertask);
}
}
myModifiedTasks.clear();
}
}
private void recalculateSupertaskScheduleBottomUp(Set<Task> supertasks,
TaskContainmentHierarchyFacade containmentFacade) {
for (Task supertask : supertasks) {
recalculateSupertaskSchedule(supertask, containmentFacade);
}
}
private void recalculateSupertaskSchedule(final Task supertask,
final TaskContainmentHierarchyFacade containmentFacade) {
Task[] nestedTasks = containmentFacade.getNestedTasks(supertask);
if (nestedTasks.length == 0) {
return;
}
GanttCalendar maxEnd = null;
GanttCalendar minStart = null;
for (Task nestedTask : nestedTasks) {
GanttCalendar nextStart = nestedTask.getStart();
if (minStart == null || nextStart.compareTo(minStart) < 0) {
minStart = nextStart;
}
GanttCalendar nextEnd = nestedTask.getEnd();
if (maxEnd == null || nextEnd.compareTo(maxEnd) > 0) {
maxEnd = nextEnd;
}
}
TaskMutator mutator = supertask.createMutator();
if (minStart.compareTo(supertask.getStart()) != 0) {
mutator.setStart(minStart);
myModifiedTasks.add(supertask);
}
if (maxEnd.compareTo(supertask.getEnd()) != 0) {
mutator.setEnd(maxEnd);
myModifiedTasks.add(supertask);
}
mutator.commit();
}
}
}