2 * Reactor - NewTorrentTrigger.java - Copyright © 2013 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.reactor.triggers;
20 import static com.google.common.base.Preconditions.checkState;
22 import java.util.List;
24 import net.pterodactylus.reactor.State;
25 import net.pterodactylus.reactor.Trigger;
26 import net.pterodactylus.reactor.states.TorrentState;
27 import net.pterodactylus.reactor.states.TorrentState.TorrentFile;
29 import com.google.common.collect.Lists;
32 * {@link Trigger} implementation that is triggered by {@link TorrentFile}s that
33 * appear in the current {@link TorrentState} but not in the previous one.
35 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
37 public class NewTorrentTrigger implements Trigger {
39 /** The newly detected torrent files. */
40 private List<TorrentFile> torrentFiles = Lists.newArrayList();
46 public boolean triggers(State currentState, State previousState) {
47 checkState(currentState instanceof TorrentState, "currentState is not a TorrentState but a %s", currentState.getClass().getName());
48 checkState(previousState instanceof TorrentState, "previousState is not a TorrentState but a %s", currentState.getClass().getName());
49 TorrentState currentTorrentState = (TorrentState) currentState;
50 TorrentState previousTorrentState = (TorrentState) previousState;
52 for (TorrentFile torrentFile : currentTorrentState) {
53 torrentFiles.add(torrentFile);
55 for (TorrentFile torrentFile : previousTorrentState) {
56 torrentFiles.remove(torrentFile);
58 return !torrentFiles.isEmpty();
65 public Output output() {
66 DefaultOutput output = new DefaultOutput(String.format("Found %d new Torrent(s)!", torrentFiles.size()));