X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fdatabase%2Fmemory%2FMemoryDatabase.java;h=975b8ab42a9b31a5a968555c4657ddbb035fecd7;hb=4aec89e6f9c6eb0972be5e9a3e1363bb487a2898;hp=c73513d92ae4d95e3f60b0a826e9c5df18fbdc58;hpb=403b51bcf5b736808e3c554b8589759e7d3d5d47;p=Sone.git

diff --git a/src/main/java/net/pterodactylus/sone/database/memory/MemoryDatabase.java b/src/main/java/net/pterodactylus/sone/database/memory/MemoryDatabase.java
index c73513d..975b8ab 100644
--- a/src/main/java/net/pterodactylus/sone/database/memory/MemoryDatabase.java
+++ b/src/main/java/net/pterodactylus/sone/database/memory/MemoryDatabase.java
@@ -84,7 +84,8 @@ public class MemoryDatabase extends AbstractService implements Database {
 
 	/** All posts by their Sones. */
 	private final Multimap<String, Post> sonePosts = HashMultimap.create();
-	private final SetMultimap<String, String> likedPosts = HashMultimap.create();
+	private final SetMultimap<String, String> likedPostsBySone = HashMultimap.create();
+	private final SetMultimap<String, String> postLikingSones = HashMultimap.create();
 
 	/** All posts by their recipient. */
 	private final Multimap<String, Post> recipientPosts = HashMultimap.create();
@@ -290,7 +291,8 @@ public class MemoryDatabase extends AbstractService implements Database {
 	public void likePost(Post post, Sone localSone) {
 		lock.writeLock().lock();
 		try {
-			likedPosts.put(localSone.getId(), post.getId());
+			likedPostsBySone.put(localSone.getId(), post.getId());
+			postLikingSones.put(post.getId(), localSone.getId());
 		} finally {
 			lock.writeLock().unlock();
 		}
@@ -300,12 +302,23 @@ public class MemoryDatabase extends AbstractService implements Database {
 	public void unlikePost(Post post, Sone localSone) {
 		lock.writeLock().lock();
 		try {
-			likedPosts.remove(localSone.getId(), post.getId());
+			likedPostsBySone.remove(localSone.getId(), post.getId());
+			postLikingSones.remove(post.getId(), localSone.getId());
 		} finally {
 			lock.writeLock().unlock();
 		}
 	}
 
+	@Override
+	public Set<Sone> getLikes(Post post) {
+		lock.readLock().lock();
+		try {
+			return from(postLikingSones.get(post.getId())).transform(getSone()).transformAndConcat(this.<Sone>unwrap()).toSet();
+		} finally {
+			lock.readLock().unlock();
+		}
+	}
+
 	//
 	// POSTSTORE METHODS
 	//
@@ -837,4 +850,13 @@ public class MemoryDatabase extends AbstractService implements Database {
 		};
 	}
 
+	private static <T> Function<Optional<T>, Iterable<T>> unwrap() {
+		return new Function<Optional<T>, Iterable<T>>() {
+			@Override
+			public Iterable<T> apply(Optional<T> input) {
+				return (input == null) ? Collections.<T>emptyList() : input.asSet();
+			}
+		};
+	}
+
 }