DATAREDIS-444 - Return result of delete in DefaultHashOperation.

Delete in DefaultHashOperation returns now the result of the HDEL command.

Original pull request: #184.
CLA: 169220160326121428 (Ninad Divadkar)

src/main/java/org/springframework/data/redis/core/BoundHashOperations.java

@@ -52,7 +52,7 @@ public interface BoundHashOperations<H, HK, HV> extends BoundKeyOperations<H> {
 
 	Long size();
 
-	void delete(Object... keys);
+	Long delete(Object... keys);
 
 	Map<HK, HV> entries();
 

src/main/java/org/springframework/data/redis/core/DefaultBoundHashOperations.java

@@ -38,15 +38,15 @@ class DefaultBoundHashOperations<H, HK, HV> extends DefaultBoundKeyOperations<H>
 	 * Constructs a new <code>DefaultBoundHashOperations</code> instance.
 	 * 
 	 * @param key
-	 * @param template
+	 * @param operations
 	 */
 	public DefaultBoundHashOperations(H key, RedisOperations<H, ?> operations) {
 		super(key, operations);
 		this.ops = operations.opsForHash();
 	}
 
-	public void delete(Object... keys) {
-		ops.delete(getKey(), keys);
+	public Long delete(Object... keys) {
+		return ops.delete(getKey(), keys);
 	}
 
 	public HV get(Object key) {

src/main/java/org/springframework/data/redis/core/DefaultHashOperations.java

@@ -201,15 +201,14 @@ class DefaultHashOperations<K, HK, HV> extends AbstractOperations<K, Object> imp
 		return deserializeHashValues(rawValues);
 	}
 
-	public void delete(K key, Object... hashKeys) {
+	public Long delete(K key, Object... hashKeys) {
 		final byte[] rawKey = rawKey(key);
 		final byte[][] rawHashKeys = rawHashKeys(hashKeys);
 
-		execute(new RedisCallback<Object>() {
+		return execute(new RedisCallback<Long>() {
 
-			public Object doInRedis(RedisConnection connection) {
-				connection.hDel(rawKey, rawHashKeys);
-				return null;
+			public Long doInRedis(RedisConnection connection) {
+				return connection.hDel(rawKey, rawHashKeys);
 			}
 		}, true);
 	}

src/main/java/org/springframework/data/redis/core/HashOperations.java

@@ -28,7 +28,7 @@ import java.util.Set;
  */
 public interface HashOperations<H, HK, HV> {
 
-	void delete(H key, Object... hashKeys);
+	Long delete(H key, Object... hashKeys);
 
 	Boolean hasKey(H key, Object hashKey);