Github user mjsax commented on a diff in the pull request:
https://github.com/apache/flink/pull/1813#discussion_r67622464
--- Diff:
flink-streaming-connectors/flink-connector-redis/src/main/java/org/apache/flink/streaming/connectors/redis/common/mapper/RedisDataTypeDescription.java
---
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.flink.streaming.connectors.redis.common.mapper;
+
+import java.io.Serializable;
+
+/**
+ * The description of the data type. This must be passed while creating
new {@link RedisMapper}.
+ * <p>When creating descriptor for {@link RedisDataType#HASH} and {@link
RedisDataType#SORTED_SET},
+ * plz use the first constructor {@link
#RedisDataTypeDescription(RedisDataType, String)}.
--- End diff --
"you need to use first constructor"
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