/*
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.Collection;
import java.util.Date;
import java.util.Iterator;
import net.sourceforge.ganttproject.task.Task;
public class ProjectBoundsAlgorithm {
public static class Result {
public final Date lowerBound;
public final Date upperBound;
private Result(Date lowerBound, Date upperBound) {
this.lowerBound = lowerBound;
this.upperBound = upperBound;
}
}
public Result getBounds(Collection/* <Task> */<Task> tasks) {
Date lowerBound = null;
Date upperBound = null;
for (Iterator<Task> it = tasks.iterator(); it.hasNext();) {
Task next = it.next();
Date start = next.getStart().getTime();
Date end = next.getEnd().getTime();
if (lowerBound == null || lowerBound.after(start)) {
lowerBound = start;
}
if (upperBound == null || upperBound.before(end)) {
upperBound = end;
}
}
return new Result(lowerBound, upperBound);
}
}