001/* 002 * Copyright 2006 - 2013 003 * Stefan Balev <stefan.balev@graphstream-project.org> 004 * Julien Baudry <julien.baudry@graphstream-project.org> 005 * Antoine Dutot <antoine.dutot@graphstream-project.org> 006 * Yoann Pigné <yoann.pigne@graphstream-project.org> 007 * Guilhelm Savin <guilhelm.savin@graphstream-project.org> 008 * 009 * This file is part of GraphStream <http://graphstream-project.org>. 010 * 011 * GraphStream is a library whose purpose is to handle static or dynamic 012 * graph, create them from scratch, file or any source and display them. 013 * 014 * This program is free software distributed under the terms of two licenses, the 015 * CeCILL-C license that fits European law, and the GNU Lesser General Public 016 * License. You can use, modify and/ or redistribute the software under the terms 017 * of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following 018 * URL <http://www.cecill.info> or under the terms of the GNU LGPL as published by 019 * the Free Software Foundation, either version 3 of the License, or (at your 020 * option) any later version. 021 * 022 * This program is distributed in the hope that it will be useful, but WITHOUT ANY 023 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 024 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 025 * 026 * You should have received a copy of the GNU Lesser General Public License 027 * along with this program. If not, see <http://www.gnu.org/licenses/>. 028 * 029 * The fact that you are presently reading this means that you have had 030 * knowledge of the CeCILL-C and LGPL licenses and that you accept their terms. 031 */ 032package org.graphstream.graph; 033 034/** 035 * Singleton exception. 036 * 037 * <p> 038 * This exception can be raised when a class instance should be unique in one 039 * context, but was instantiated several times. This can be used in a 040 * "singleton" pattern, but also in set classes (containers) when the same 041 * element has been inserted multiple times but should not. 042 * </p> 043 * 044 * @since 19990811 045 */ 046public class IdAlreadyInUseException extends RuntimeException { 047 private static final long serialVersionUID = -3000770118436738366L; 048 049 /** 050 * Throws the message "singleton exception". 051 */ 052 public IdAlreadyInUseException() { 053 super("singleton exception"); 054 } 055 056 /** 057 * Throws a given message. 058 * 059 * @param message 060 * The message to throw. 061 */ 062 public IdAlreadyInUseException(String message) { 063 super("singleton exception: " + message); 064 } 065}