2 * Sone - AbstractAlbumBuilder.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.Optional.absent;
21 import static com.google.common.base.Optional.fromNullable;
22 import static java.util.UUID.randomUUID;
24 import net.pterodactylus.sone.database.AlbumBuilder;
26 import com.google.common.base.Optional;
29 * Abstract {@link AlbumBuilder} implementation. It stores the state of the new
30 * album 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 AbstractAlbumBuilder implements AlbumBuilder {
36 private Optional<String> id = absent();
39 public AlbumBuilder withId(String id) {
40 this.id = fromNullable(id);
48 protected String getId() {
49 return id.isPresent() ? id.get() : randomUUID().toString();
53 * Validates the state of this post builder.
55 * @throws IllegalStateException
56 * if the state is not valid for building a new post
58 protected void validate() throws IllegalStateException {