/*
Copyright 2003-2012 Dmitry Barashev, GanttProject Team
This file is part of GanttProject, an opensource project management tool.
GanttProject 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.
GanttProject 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 GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sourceforge.ganttproject.task.algorithm;
import java.util.Collections;
import java.util.List;
import biz.ganttproject.core.time.TimeDuration;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskManagerImpl;
import net.sourceforge.ganttproject.task.dependency.TaskDependencyException;
public class ShiftTaskTreeAlgorithm {
public static final boolean DEEP = true;
public static final boolean SHALLOW = false;
private final TaskManagerImpl myTaskManager;
private final RecalculateTaskScheduleAlgorithm myRescheduleAlgorithm;
public ShiftTaskTreeAlgorithm(TaskManagerImpl taskManager, RecalculateTaskScheduleAlgorithm rescheduleAlgorithm) {
myTaskManager = taskManager;
myRescheduleAlgorithm = rescheduleAlgorithm;
}
public void run(List<Task> tasks, TimeDuration shift, boolean deep) throws AlgorithmException {
myTaskManager.setEventsEnabled(false);
try {
for (Task t : tasks) {
shiftTask(t, shift, deep);
}
try {
myTaskManager.getAlgorithmCollection().getScheduler().run();
} catch (TaskDependencyException e) {
throw new AlgorithmException("Failed to reschedule the following tasks tasks after move:\n" + tasks, e);
}
} finally {
myTaskManager.setEventsEnabled(true);
}
}
public void run(Task rootTask, TimeDuration shift, boolean deep) throws AlgorithmException {
run(Collections.singletonList(rootTask), shift, deep);
}
private void shiftTask(Task rootTask, TimeDuration shift, boolean deep) {
if (rootTask != myTaskManager.getRootTask()) {
rootTask.shift(shift);
}
if (deep) {
Task[] nestedTasks = rootTask.getManager().getTaskHierarchy().getNestedTasks(rootTask);
for (int i = 0; i < nestedTasks.length; i++) {
Task next = nestedTasks[i];
shiftTask(next, shift, true);
}
}
}
}