From 5960d429777d56130ce044e7f38406be0f44495b Mon Sep 17 00:00:00 2001 From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?= Date: Wed, 9 Oct 2013 21:46:30 +0200 Subject: [PATCH] Add base implementation of an album builder. --- .../sone/data/impl/AbstractAlbumBuilder.java | 64 ++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 src/main/java/net/pterodactylus/sone/data/impl/AbstractAlbumBuilder.java diff --git a/src/main/java/net/pterodactylus/sone/data/impl/AbstractAlbumBuilder.java b/src/main/java/net/pterodactylus/sone/data/impl/AbstractAlbumBuilder.java new file mode 100644 index 0000000..312c795 --- /dev/null +++ b/src/main/java/net/pterodactylus/sone/data/impl/AbstractAlbumBuilder.java @@ -0,0 +1,64 @@ +/* + * Sone - AbstractAlbumBuilder.java - Copyright © 2013 David Roden + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +package net.pterodactylus.sone.data.impl; + +import static com.google.common.base.Preconditions.checkState; + +import net.pterodactylus.sone.database.AlbumBuilder; + +/** + * Abstract {@link AlbumBuilder} implementation. It stores the state of the new + * album and performs validation, you only need to implement {@link #build()}. + * + * @author David ‘Bombe’ Roden + */ +public abstract class AbstractAlbumBuilder implements AlbumBuilder { + + /** Whether to create an album with a random ID. */ + protected boolean randomId; + + /** The ID of the album to create. */ + protected String id; + + @Override + public AlbumBuilder randomId() { + randomId = true; + return this; + } + + @Override + public AlbumBuilder withId(String id) { + this.id = id; + return this; + } + + // + // PROTECTED METHODS + // + + /** + * Validates the state of this post builder. + * + * @throws IllegalStateException + * if the state is not valid for building a new post + */ + protected void validate() throws IllegalStateException { + checkState((randomId && (id == null)) || (!randomId && (id != null)), "exactly one of random ID or custom ID must be set"); + } + +} -- 2.7.4