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 net.pterodactylus.sone.data.Post;
23 import net.pterodactylus.sone.database.PostBuilder;
25 import org.apache.commons.lang.StringUtils;
28 * Abstract {@link PostBuilder} implementation. It stores the state of the new
29 * post and performs validation, you only need to implement {@link #build()}.
31 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
33 public abstract class AbstractPostBuilder implements PostBuilder {
35 /** Wether to create a post with a random ID. */
36 protected boolean randomId;
38 /** The ID of the post. */
41 /** The sender of the post. */
42 protected String senderId;
44 /** Whether to use the current time when creating the post. */
45 protected boolean currentTime;
47 /** The time of the post. */
50 /** The text of the post. */
51 protected String text;
53 /** The (optional) recipient of the post. */
54 protected String recipientId;
57 // POSTBUILDER METHODS
64 public PostBuilder copyPost(Post post) {
65 this.randomId = false;
66 this.id = post.getId();
67 this.senderId = post.getSone().getId();
68 this.currentTime = false;
69 this.time = post.getTime();
70 this.text = post.getText();
71 this.recipientId = post.getRecipientId().orNull();
79 public PostBuilder randomId() {
88 public PostBuilder withId(String id) {
97 public PostBuilder from(String senderId) {
98 this.senderId = senderId;
106 public PostBuilder currentTime() {
115 public PostBuilder withTime(long time) {
124 public PostBuilder withText(String text) {
133 public PostBuilder to(String recipientId) {
134 this.recipientId = recipientId;
143 * Validates the state of this post builder.
145 * @throws IllegalStateException
146 * if the state is not valid for building a new post
148 protected void validate() throws IllegalStateException {
149 checkState((randomId && (id == null)) || (!randomId && (id != null)), "exactly one of random ID or custom ID must be set");
150 checkState(senderId != null, "sender must not be null");
151 checkState((currentTime && (time == 0)) || (!currentTime && (time > 0)), "one of current time or custom time must be set");
152 checkState(!StringUtils.isBlank(text), "text must not be empty");
153 checkState((recipientId == null) || !recipientId.equals(senderId), "sender and recipient must not be the same");