From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Wed, 9 Oct 2013 19:46:30 +0000 (+0200)
Subject: Add base implementation of an album builder.
X-Git-Tag: 0.8.8^2~19
X-Git-Url: https://git.pterodactylus.net/?p=Sone.git;a=commitdiff_plain;h=5960d429777d56130ce044e7f38406be0f44495b

Add base implementation of an album builder.
---

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 <http://www.gnu.org/licenses/>.
+ */
+
+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 <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+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");
+	}
+
+}