2 * Sone - AbstractPostBuilder.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.data.impl;
20 import static com.google.common.base.Preconditions.checkState;
22 import org.apache.commons.lang.StringUtils;
24 import net.pterodactylus.sone.data.Post;
25 import net.pterodactylus.sone.database.PostBuilder;
26 import net.pterodactylus.sone.database.SoneProvider;
29 * Abstract {@link PostBuilder} implementation. It stores the state of the new
30 * post and performs validation, you only need to implement {@link #build()}.
32 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
34 public abstract class AbstractPostBuilder implements PostBuilder {
36 /** The Sone provider for the created posts. */
37 protected final SoneProvider soneProvider;
39 /** Wether to create a post with a random ID. */
40 protected boolean randomId;
42 /** The ID of the post. */
45 /** The sender of the post. */
46 protected String senderId;
48 /** Whether to use the current time when creating the post. */
49 protected boolean currentTime;
51 /** The time of the post. */
54 /** The text of the post. */
55 protected String text;
57 /** The (optional) recipient of the post. */
58 protected String recipientId;
61 * Creates a new abstract post builder.
66 public AbstractPostBuilder(SoneProvider soneProvider) {
67 this.soneProvider = soneProvider;
71 // POSTBUILDER METHODS
78 public PostBuilder copyPost(Post post) {
79 this.randomId = false;
80 this.id = post.getId();
81 this.senderId = post.getSone().getId();
82 this.currentTime = false;
83 this.time = post.getTime();
84 this.text = post.getText();
85 this.recipientId = post.getRecipientId().orNull();
93 public PostBuilder randomId() {
102 public PostBuilder withId(String id) {
111 public PostBuilder from(String senderId) {
112 this.senderId = senderId;
120 public PostBuilder currentTime() {
129 public PostBuilder withTime(long time) {
138 public PostBuilder withText(String text) {
147 public PostBuilder to(String recipientId) {
148 this.recipientId = recipientId;
157 * Validates the state of this post builder.
159 * @throws IllegalStateException
160 * if the state is not valid for building a new post
162 protected void validate() throws IllegalStateException {
163 checkState((randomId && (id == null)) || (!randomId && (id != null)), "exactly one of random ID or custom ID must be set");
164 checkState(senderId != null, "sender must not be null");
165 checkState((currentTime && (time == 0)) || (!currentTime && (time > 0)), "one of current time or custom time must be set");
166 checkState(!StringUtils.isBlank(text), "text must not be empty");
167 checkState((recipientId == null) || !recipientId.equals(senderId), "sender and recipient must not be the same");