2 * Sone - PostBuilder.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.sone.database;
20 import net.pterodactylus.sone.data.Post;
21 import net.pterodactylus.sone.data.Sone;
23 import com.google.common.base.Optional;
26 * Builder for {@link Post} objects.
28 * A {@link Post} consists of the following elements:
31 * <li>a {@link Sone sender},</li>
32 * <li>an optional {@link Sone recipient},</li>
34 * <li>and a text.</li>
36 * Except for the recipient, all this elements have to be configured on this
37 * builder. For the ID you have the possibility to configure either a random ID
38 * (which should be used for new posts) or a custom ID you specify (for creating
39 * an existing post). For the time you can use the current time (again, for
40 * creating new posts) or the given time (for loading posts). It is an error to
41 * specify both ways for either the ID or the time.
43 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
45 public interface PostBuilder {
48 * Configures this builder to use the given ID as ID for the new post. If
49 * this method is used, {@link #randomId()} must not be used.
52 * The ID to use for the post
53 * @return This post builder
55 public PostBuilder withId(String id);
58 * Configures the builder to use the given time as time for the new post. If
59 * this method is used, {@link #currentTime()} must not be used.
62 * The time to use for the post
63 * @return This post builder
65 public PostBuilder withTime(long time);
68 * Configures the builder to use the given text for the new post.
71 * The text to use for the post
72 * @return This post builder
74 public PostBuilder withText(String text);
77 * Configures the builder to use the given {@link Sone} as recipient for the
81 * The ID of the recipient of the post
82 * @return This post builder
84 public PostBuilder to(Optional<String> recipientId);
87 * Verifies this builder’s configuration and creates a new post.
89 * The following conditions must be met in order for this builder to be
90 * configured correctly:
92 * <li>Exactly one of {@link #randomId()} or {@link #withId(String)} must
93 * have been called.</li>
94 * <li>The {@link #from(String) sender} must not be {@code null}.</li>
95 * <li>Exactly one of {@link #currentTime()} or {@link #withTime(long)} must
96 * have been called.</li>
97 * <li>The {@link #withText(String) text} must not be {@code null} and must
98 * contain something other than whitespace.</li>
99 * <li>The {@link #to(String) recipient} must either not have been set, or
100 * it must have been set to a {@link Sone} other than {@link #from(String)
105 * @throws IllegalStateException
106 * if this builder’s configuration is not valid
108 public Post build(Optional<PostCreated> postCreated) throws IllegalStateException;
110 interface PostCreated {
112 void postCreated(Post post);