/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of 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.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.swing.catalog;
import java.util.Iterator;
import java.util.LinkedList;
import org.smallmind.nutsnbolts.util.DirectionalComparator;
public class MultiListSelectionStack<T extends Comparable<T>> {
private LinkedList<MultiListSelection<T>> selectionList;
private DirectionalComparator.Direction direction;
public MultiListSelectionStack (DirectionalComparator.Direction direction) {
this.direction = direction;
selectionList = new LinkedList<MultiListSelection<T>>();
}
public synchronized void addMultiListSelection (MultiListSelection<T> selection) {
Iterator<MultiListSelection<T>> selectionIter;
int index = 0;
if (selection != null) {
selectionIter = selectionList.iterator();
while (selectionIter.hasNext()) {
if (selection.compareTo(selectionIter.next(), direction) < 0) {
break;
}
else {
index++;
}
}
selectionList.add(index, selection);
}
}
public synchronized MultiListSelection<T> getFirst () {
if (selectionList.isEmpty()) {
return null;
}
return selectionList.getFirst();
}
public synchronized MultiListSelection<T> getLast () {
if (selectionList.isEmpty()) {
return null;
}
return selectionList.getLast();
}
}