2 * Rhynodge - 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.rhynodge.triggers;
20 import java.util.HashSet;
23 import net.pterodactylus.rhynodge.State;
24 import net.pterodactylus.rhynodge.Trigger;
25 import net.pterodactylus.rhynodge.states.TorrentState;
26 import net.pterodactylus.rhynodge.states.TorrentState.TorrentFile;
28 import static com.google.common.base.Preconditions.checkState;
31 * {@link Trigger} implementation that is triggered by {@link TorrentFile}s that
32 * appear in the current {@link TorrentState} but not in the previous one.
34 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
36 public class NewTorrentTrigger implements Trigger {
38 private boolean triggered = false;
48 public State mergeStates(State previousState, State currentState) {
49 checkState(currentState instanceof TorrentState, "currentState is not a TorrentState but a %s", currentState.getClass().getName());
50 checkState(previousState instanceof TorrentState, "previousState is not a TorrentState but a %s", currentState.getClass().getName());
52 Set<TorrentFile> allTorrentFiles = new HashSet<>(((TorrentState) previousState).torrentFiles());
53 Set<TorrentFile> newTorrentFiles = new HashSet<>();
54 for (TorrentFile torrentFile : (TorrentState) currentState) {
55 if (allTorrentFiles.add(torrentFile)) {
56 newTorrentFiles.add(torrentFile);
61 return new TorrentState(allTorrentFiles, newTorrentFiles);
68 public boolean triggers() {