/**
* 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;
public class PassiveChangeListener<T> implements Listener<T>, Serializable {
private static final long serialVersionUID = -8661407199741916844L;
protected boolean changed = false;
/**
* Returns whether the listener received any event since the last call of
* this method. Resets this listener such that another call of this method
* without receiving an event in between will return false.
*
* @param <T> a T object.
* @return a boolean.
*/
public boolean hasChanged() {
boolean result = changed;
changed = false;
return result;
}
/** {@inheritDoc} */
@Override
public void receiveEvent(T event) {
changed = true;
}
}