/*
* RapidMiner
*
* Copyright (C) 2001-2014 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* 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 com.rapidminer.gui.new_plotter.utility;
import java.util.List;
/**
* @author Nils Woehler
*
*/
public class ListUtility {
/**
* This function shifts the element to a new index in the list. If element is shifted right the
* element currently at the new position (if any) and any subsequent elements are shifted to the
* right (adds one to their indices). If the element is shifted left the element currently at
* the new position (if any) and any subsequent elements up to the old index are shifted to the
* right (adds one to their indices). All elements from the right side of the old index are
* shifted left.
* <b>
* If size of list is one or the old index equals the new index, no changes will commence.
* Returns <code>true</code> if changes have been performed, <code>false</code> otherwise.
*/
public static <T> boolean changeIndex(List<T> list, T element, int index) {
final int oldIndex = list.indexOf(element);
final int listSize = list.size();
if (index != oldIndex && oldIndex != -1) {
if (listSize == 1) {
return true;
}
// remove element
list.remove(oldIndex);
// add element at index
list.add(index, element);
return true;
}
return false;
}
}