2 * Sone - UniqueElementFilter.java - Copyright © 2011–2016 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.sone.template;
20 import java.util.Collection;
21 import java.util.HashSet;
25 import net.pterodactylus.util.template.Filter;
26 import net.pterodactylus.util.template.TemplateContext;
29 * Filter that reduces a collection to a {@link Set}, removing duplicates.
31 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
33 public class UniqueElementFilter implements Filter {
39 public Object format(TemplateContext templateContext, Object data, Map<String, Object> parameters) {
40 if (!(data instanceof Collection<?>)) {
43 return new HashSet<Object>((Collection<?>) data);