/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite 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 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package org.evosuite.utils;
import java.io.Serializable;
/**
* {@link java.util.Observable} should be an interface. It is not so we cannot
* use it if the class to implement it has already a certain parent.
*
* @author roessler
* @param <T>
* The type of the event.
*/
public interface Listenable<T> extends Serializable {
/**
* Add a listener. He will be notified of changes via the
* {@link Listener#fireEvent(Object)} method.
*
* @param listener
* The listener to add.
* @param <T> a T object.
*/
void addListener(Listener<T> listener);
/**
* Remove the given Listener such that he will no longer receive event
* updates. If the listener is removed several times or was not added prior
* to removal, nothing happens.
*
* @param listener
* The listener to remove.
*/
void deleteListener(Listener<T> listener);
}