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KafkaJsonSchemaDeserializer.java
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KafkaJsonSchemaDeserializer.java
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/*
* Copyright 2020 Confluent Inc.
*
* Licensed under the Confluent Community License (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.confluent.io/confluent-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package io.confluent.kafka.serializers.json;
import com.google.common.annotations.VisibleForTesting;
import org.apache.kafka.common.header.Headers;
import org.apache.kafka.common.serialization.Deserializer;
import java.io.IOException;
import java.util.Map;
import io.confluent.kafka.schemaregistry.client.SchemaRegistryClient;
/**
* Generic JSON deserializer.
*/
public class KafkaJsonSchemaDeserializer<T> extends AbstractKafkaJsonSchemaDeserializer<T>
implements Deserializer<T> {
/**
* Constructor used by Kafka consumer.
*/
public KafkaJsonSchemaDeserializer() {
}
public KafkaJsonSchemaDeserializer(SchemaRegistryClient client) {
this.schemaRegistry = client;
this.ticker = ticker(client);
}
public KafkaJsonSchemaDeserializer(SchemaRegistryClient client, Map<String, ?> props) {
this(client, props, null);
}
@VisibleForTesting
public KafkaJsonSchemaDeserializer(
SchemaRegistryClient client,
Map<String, ?> props,
Class<T> type
) {
this.schemaRegistry = client;
this.ticker = ticker(client);
configure(deserializerConfig(props), type);
}
@Override
public void configure(Map<String, ?> props, boolean isKey) {
configure(new KafkaJsonSchemaDeserializerConfig(props), isKey);
}
@SuppressWarnings("unchecked")
protected void configure(KafkaJsonSchemaDeserializerConfig config, boolean isKey) {
this.isKey = isKey;
if (isKey) {
configure(
config,
(Class<T>) config.getClass(KafkaJsonSchemaDeserializerConfig.JSON_KEY_TYPE)
);
} else {
configure(
config,
(Class<T>) config.getClass(KafkaJsonSchemaDeserializerConfig.JSON_VALUE_TYPE)
);
}
}
@Override
public T deserialize(String topic, byte[] data) {
return deserialize(topic, null, data);
}
@Override
public T deserialize(String topic, Headers headers, byte[] bytes) {
return (T) deserialize(false, topic, isKey, headers, bytes);
}
@Override
public void close() {
try {
super.close();
} catch (IOException e) {
throw new RuntimeException("Exception while closing deserializer", e);
}
}
}