From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Sat, 28 Jul 2012 23:36:04 +0000 (+0200)
Subject: Add method to get a track by a derivative ID.
X-Git-Url: https://git.pterodactylus.net/?p=demoscenemusic.git;a=commitdiff_plain;h=747a5afddade17479a3d0e951c1e5ce51a3b7950

Add method to get a track by a derivative ID.
---

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index c0001c4..967faa5 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -329,6 +329,24 @@ public class DataManager {
 	}
 
 	/**
+	 * Returns the track that contains the derivative with the given ID.
+	 *
+	 * @param id
+	 *            The ID of the track derivative
+	 * @return The track the derivative belongs to, or {@code null} if there is
+	 *         no such track
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
+	public Track getTrackByDerivativeId(String id) throws DatabaseException {
+		Query query = new Query(Type.SELECT, "TRACKS");
+		query.addField(new Field("TRACKS.*"));
+		query.addJoin(new Join(JoinType.INNER, "TRACK_DERIVATIVES", new Field("TRACK_DERIVATIVES.TRACK"), new Field("TRACKS.ID")));
+		query.addWhereClause(new ValueFieldWhereClause(new ValueField("TRACK_DERIVATIVES.ID", new StringParameter(id))));
+		return loadTrackProperties(database.getSingle(query, trackCreator));
+	}
+
+	/**
 	 * Returns all tracks by the artist with the given ID.
 	 *
 	 * @param artistId