Add intersectSize methods for SINTERCARD operation in SetOperations

Author: Kiminni

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

@@ -140,6 +140,25 @@ public Long intersectAndStore(Collection<K> keys, K destKey) {
 		return execute(connection -> connection.sInterStore(rawDestKey, rawKeys));
 	}
 
+	@Override
+	public Long intersectSize(K key, K otherKey) {
+		return intersectSize(Arrays.asList(key, otherKey));
+	}
+
+	@Override
+	public Long intersectSize(K key, Collection<K> otherKeys) {
+
+		byte[][] rawKeys = rawKeys(key, otherKeys);
+		return execute(connection -> connection.sInterCard(rawKeys));
+	}
+
+	@Override
+	public Long intersectSize(Collection<K> keys) {
+
+		byte[][] rawKeys = rawKeys(keys);
+		return execute(connection -> connection.sInterCard(rawKeys));
+	}
+
 	@Override
 	public Boolean isMember(K key, Object o) {
 

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

@@ -30,6 +30,7 @@
  * @author Christoph Strobl
  * @author Mark Paluch
  * @author Roman Bezpalko
+ * @author Mingi Lee
  */
 @NullUnmarked
 public interface SetOperations<K, V> {
@@ -178,6 +179,38 @@ public interface SetOperations<K, V> {
 	 */
 	Long intersectAndStore(@NonNull Collection<@NonNull K> keys, @NonNull K destKey);
 
+	/**
+	 * Returns the cardinality of the set which would result from the intersection of {@code key} and {@code otherKey}.
+	 *
+	 * @param key must not be {@literal null}.
+	 * @param otherKey must not be {@literal null}.
+	 * @return {@literal null} when used in pipeline / transaction.
+	 * @see <a href="https://redis.io/commands/sintercard">Redis Documentation: SINTERCARD</a>
+	 * @since 3.4
+	 */
+	Long intersectSize(@NonNull K key, @NonNull K otherKey);
+
+	/**
+	 * Returns the cardinality of the set which would result from the intersection of {@code key} and {@code otherKeys}.
+	 *
+	 * @param key must not be {@literal null}.
+	 * @param otherKeys must not be {@literal null}.
+	 * @return {@literal null} when used in pipeline / transaction.
+	 * @see <a href="https://redis.io/commands/sintercard">Redis Documentation: SINTERCARD</a>
+	 * @since 3.4
+	 */
+	Long intersectSize(@NonNull K key, @NonNull Collection<@NonNull K> otherKeys);
+
+	/**
+	 * Returns the cardinality of the set which would result from the intersection of all given sets at {@code keys}.
+	 *
+	 * @param keys must not be {@literal null}.
+	 * @return {@literal null} when used in pipeline / transaction.
+	 * @see <a href="https://redis.io/commands/sintercard">Redis Documentation: SINTERCARD</a>
+	 * @since 3.4
+	 */
+	Long intersectSize(@NonNull Collection<@NonNull K> keys);
+
 	/**
 	 * Union all sets at given {@code keys} and {@code otherKey}.
 	 *