content: package streams;
  
  /*
   * 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.
   */
  import com.fasterxml.jackson.databind.ObjectMapper;
  import org.apache.kafka.common.errors.SerializationException;
  import org.apache.kafka.common.serialization.Serializer;
  
  import java.util.Map;
  
  public class JsonPOJOSerializer<T> implements Serializer<T> {
      private final ObjectMapper objectMapper = new ObjectMapper();
  
      /**
       * Default constructor needed by Kafka
       */
      public JsonPOJOSerializer() {
      }
  
      @Override
      public void configure(Map<String, ?> props, boolean isKey) {
      }
  
      @Override
      public byte[] serialize(String topic, T data) {
          if (data == null)
              return null;
  
          try {
              return objectMapper.writeValueAsBytes(data);
          } catch (Exception e) {
              throw new SerializationException("Error serializing JSON message", e);
          }
      }
  
      @Override
      public void close() {
      }
  
  }
  
  