/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* CloudML 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.cloudml.facade.commands;
/**
* Abstract behaviour of a cloudML command, i.e., a treatment that the CloudML
* facade is able to perform.
*
* The pattern command is used to ensure that the GUI may remain reactive even
* if some commands take a longer time to complete. The shell for instance, may
* want to run command as background tasks, as one does on a UNIX terminal.
*
* @author Franck Chauvel - SINTEF ICT
* @author Brice Morin - SINTEF ICT
* @since 1.0
*/
public abstract class CloudMlCommand {
public abstract void execute(CommandHandler target);
/*
* The equality of commands is computed on the associated string. Two
* commands that serialize the same are equals.
*/
@Override
public final boolean equals(Object object) {
if (object == null) {
return false;
}
if (object instanceof CloudMlCommand) {
final CloudMlCommand command = (CloudMlCommand) object;
return toString().equals(command.toString());
}
return false;
}
@Override
public final int hashCode() {
return toString().hashCode();
}
@Override
public abstract String toString();
}