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Subject [GitHub] [kafka] thake commented on a change in pull request #9338: KAFKA-10515: Properly initialize nullable Serdes with default values
Date Wed, 14 Oct 2020 19:37:01 GMT

thake commented on a change in pull request #9338:
URL: https://github.com/apache/kafka/pull/9338#discussion_r504924920

File path: streams/src/main/java/org/apache/kafka/streams/kstream/internals/WrappingNullableSerde.java
@@ -0,0 +1,36 @@
+ * 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.kafka.streams.kstream.internals;
+import org.apache.kafka.common.serialization.Deserializer;
+import org.apache.kafka.common.serialization.Serde;
+import org.apache.kafka.common.serialization.Serializer;
+public interface WrappingNullableSerde<T, InnerK, InnerV> extends Serde<T> {
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    default void setIfUnset(final Serde<InnerK> defaultKeySerde, final Serde<InnerV>
defaultValueSerde) {
+        final Serializer<T> serializer = this.serializer();

Review comment:
       Ah, my bad. I didn't get the API right. I propably have worked too much on kotlin code
with a lot of immutables :) The abstract class is a good idea to circumvent this problem.
I'll check the PR and comment on it directly.

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