Github user mjsax commented on a diff in the pull request:
https://github.com/apache/flink/pull/1813#discussion_r58113357
--- Diff:
flink-streaming-connectors/flink-connector-redis/src/main/java/org/apache/flink/streaming/connectors/redis/common/mapper/RedisDataTypeDescription.java
---
@@ -0,0 +1,61 @@
+/*
+ * 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 org.apache.flink.api.common.functions.Function;
+
+import java.io.Serializable;
+
+public class RedisDataTypeDescription implements Function, Serializable {
+
+ private static final long serialVersionUID = 1L;
+
+ private RedisDataType dataType;
+ private String additionalKey;
+
+ /**
+ * Use this constructor when data type is HASH or SORTED_SET
+ * @param dataType the redis data type {@link RedisDataType}
+ * @param additionalKey additional key for Hash and Sorted set data type
+ */
+ public RedisDataTypeDescription(RedisDataType dataType, String
additionalKey) {
+ this.dataType = dataType;
+ this.additionalKey = additionalKey;
+
+ if (dataType == RedisDataType.HASH || dataType ==
RedisDataType.SORTED_SET) {
+ if (additionalKey == null) {
+ throw new IllegalArgumentException("Hash and
Sorted Set should have additional key");
+ }
+ }
+ }
+
+ /**
+ * Use this constructor when data type is not HASH or SORTED_SET
+ * @param dataType the redis data type {@link RedisDataType}
+ */
+ public RedisDataTypeDescription(RedisDataType dataType) {
+ this(dataType, null);
+ }
+
+ public RedisDataType getDataType() {
--- End diff --
JavaDoc
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