001 /** 002 * planningtool - A Planning Tool with Critiquing Support. 003 * 004 * Copyright (C) 2006 olale 005 006 * This program is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU General Public License 008 * as published by the Free Software Foundation; either version 2 009 * of the License, or (at your option) any later version. 010 011 * This program is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 014 * GNU General Public License for more details. 015 016 * You should have received a copy of the GNU General Public License 017 * along with this program; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 019 020 * Contact information: 021 * E-mail: olale@ida.liu.se 022 * olale@lysator.liu.se 023 */ 024 package se.liu.ida.critiquer.activities.parameters; 025 026 027 /** 028 * 029 * There may be parameters in activities that are nested within other parameters 030 * but may have to be passed as reference to listeners that are interested in 031 * knowing when things that affect activities are changed. Therefore we have 032 * this interface which is implemented both by ActivityParameter and 033 * AgentParameter. An AgentParameter is associated with a Commander, which in 034 * turn can be associated with several activities. If agents are selected to 035 * commanders, it affects all the activities that the commander is in control 036 * of. Therefore such a change should be propagated to all concerned activities. 037 * The only way to do that is to have a common interface for parameters that are 038 * directly connected to activities and those that are nested deeper within. We 039 * will try to keep the interface light therefore. 040 * 041 * @author olale 042 * 043 */ 044 public interface Parameter<T> { 045 046 public T getValue(); 047 048 public boolean hasValue(); 049 }