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/*
This file is part of GNUnet.
Copyright (C) 2012, 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
package org.gnunet.util;
import java.util.LinkedList;
import java.util.List;
/**
* Token that calls a method or other cancelables on cancellation,
* and stores its cancellation state.
*/
public class CancellationToken implements Cancelable {
private boolean isCanceled;
private List<Cancelable> cancelables = new LinkedList<Cancelable>();
@Override
public void cancel() {
if (isCanceled) {
throw new AssertionError();
}
for (Cancelable c : cancelables) {
c.cancel();
}
}
public void add(Cancelable cancelable) {
if (isCanceled) {
throw new AssertionError();
}
cancelables.add(cancelable);
}
}
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