From 442daa4c3aafcc8398ab52e7e475f3c28c5e7caa Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Thu, 19 Apr 2012 16:11:47 +0200
Subject: [PATCH] =?utf8?q?Load=20an=20artist=E2=80=99s=20groups=20lazily.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

---
 .../demoscenemusic/data/DataManager.java            | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index 85f35fa..7e74ea9 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -202,10 +202,31 @@ public class DataManager {
 			}
 		});
 
+		private final Memoizer<Void> groupsMemoizer = new Memoizer<Void>(new Callable<Void>() {
+
+			@Override
+			public Void call() throws Exception {
+				if (!hasValue("groups")) {
+					value("groups", Collection.class).set(getGroupsByArtist(id()));
+				}
+				return null;
+			}
+
+		});
+
 		public LazyArtist(String id) {
 			super(id);
 		}
 
+		/**
+		 * {@inheritDoc}
+		 */
+		@Override
+		public Collection<Group> groups() {
+			groupsMemoizer.get();
+			return super.groups();
+		}
+
 		public Collection<Track> tracks() {
 			tracksMemoizer.get();
 			return super.tracks();
-- 
2.7.4