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https://issues.apache.org/jira/browse/FLINK-3871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15673940#comment-15673940
]
ASF GitHub Bot commented on FLINK-3871:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2762#discussion_r88451582
--- Diff:
flink-streaming-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/KafkaAvroTableSource.java
---
@@ -0,0 +1,84 @@
+/*
+ * 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.kafka;
+
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.table.sources.StreamTableSource;
+import org.apache.flink.streaming.connectors.kafka.internals.TypeUtil;
+import
org.apache.flink.streaming.util.serialization.AvroRowDeserializationSchema;
+import org.apache.flink.streaming.util.serialization.DeserializationSchema;
+
+import java.util.Properties;
+
+/**
+ * A version-agnostic Kafka Avro {@link StreamTableSource}.
+ *
+ * <p>The version-specific Kafka consumers need to extend this class and
+ * override {@link #getKafkaConsumer(String, Properties,
DeserializationSchema)}}.
+ *
+ * <p>The field names are used to parse the Avro file and so are the types.
+ */
+public abstract class KafkaAvroTableSource extends KafkaTableSource {
+
+ /**
+ * Creates a generic Kafka Avro {@link StreamTableSource}.
+ *
+ * @param topic Kafka topic to consume.
+ * @param properties Properties for the Kafka consumer.
+ * @param fieldNames Row field names.
+ * @param fieldTypes Row field types.
+ */
+ KafkaAvroTableSource(
+ String topic,
+ Properties properties,
+ String[] fieldNames,
+ Class<?>[] fieldTypes) {
+
+ super(topic, properties,
createDeserializationSchema(fieldTypes), fieldNames, fieldTypes);
+ }
+
+ /**
+ * Creates a generic Kafka Avro {@link StreamTableSource}.
+ *
+ * @param topic Kafka topic to consume.
+ * @param properties Properties for the Kafka consumer.
+ * @param fieldNames Row field names.
+ * @param fieldTypes Row field types.
+ */
+ KafkaAvroTableSource(
+ String topic,
+ Properties properties,
+ String[] fieldNames,
+ TypeInformation<?>[] fieldTypes) {
+
+ super(topic, properties,
createDeserializationSchema(fieldTypes), fieldNames, fieldTypes);
+ }
+
+ private static AvroRowDeserializationSchema createDeserializationSchema(
+ TypeInformation<?>[] fieldTypes) {
+
+ return new AvroRowDeserializationSchema(new String[]{"f1",
"f2", "f3"}, fieldTypes);
+ }
+
+ private static AvroRowDeserializationSchema createDeserializationSchema(
+ Class<?>[] fieldTypes) {
+
+ return new AvroRowDeserializationSchema(new String[]{"f1",
"f2", "f3"}, TypeUtil.toTypeInfo(fieldTypes));
--- End diff --
why are the field names set to `new String[]{"f1", "f2", "f3"}`?
> Add Kafka TableSource with Avro serialization
> ---------------------------------------------
>
> Key: FLINK-3871
> URL: https://issues.apache.org/jira/browse/FLINK-3871
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Fabian Hueske
>
> Add a Kafka TableSource which supports Avro serialized data.
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