2 * Sone - PostCache.java - Copyright © 2010 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.core;
20 import java.util.HashMap;
23 import net.pterodactylus.sone.data.Post;
24 import net.pterodactylus.sone.data.PostShell;
25 import net.pterodactylus.sone.data.Shell;
28 * {@link Shell}-aware {@link Map} from post IDs to {@link Post}s that exchanges
29 * an existing {@link Shell} against the real object once it’s available.
31 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
33 public class PostCache {
36 private final Map<String, Post> posts = new HashMap<String, Post>();
39 * Stores the given post in this cache. If the given post is not a
40 * {@link Shell}, it is stored. If it is a {@link Shell} it is only stored
41 * if there is no post stored for the ID of the given post. If the given
42 * {@code post} is a {@link Shell}, it needs to have its
43 * {@link PostShell#setId(java.util.UUID) ID} set!
48 public void store(Post post) {
49 if (!(post instanceof Shell<?>) || !posts.containsKey(post.getId())) {
50 posts.put(post.getId(), post);
55 * Returns the post with the given ID.
59 * @return The post with the given ID, or {@code null} if there is no post
62 public Post get(String id) {