KeyedDeserializationSchema (Flink : Connectors : Kafka 3.3.0-1.19 API)

Type Parameters:

T - The type created by the keyed deserialization schema.

All Superinterfaces:

KafkaDeserializationSchema<T>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<T>, Serializable
```
@Deprecated
@PublicEvolving
public interface KeyedDeserializationSchema<T>
extends KafkaDeserializationSchema<T>
```
Deprecated.
Use KafkaDeserializationSchema.

The deserialization schema describes how to turn the byte key / value messages delivered by certain data sources (for example Apache Kafka) into data types (Java/Scala objects) that are processed by Flink.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`T`	`deserialize(byte[] messageKey, byte[] message, String topic, int partition, long offset)`	Deprecated. Deserializes the byte message.
`default T`	`deserialize(org.apache.kafka.clients.consumer.ConsumerRecord<byte[],byte[]> record)`	Deprecated. Deserializes the Kafka record.

Methods inherited from interface org.apache.flink.streaming.connectors.kafka.KafkaDeserializationSchema
deserialize, isEndOfStream, open

Methods inherited from interface org.apache.flink.api.java.typeutils.ResultTypeQueryable
getProducedType

- Method Detail
  - deserialize
```
T deserialize(byte[] messageKey,
              byte[] message,
              String topic,
              int partition,
              long offset)
       throws IOException
```
    Deprecated.
    
    Deserializes the byte message.
    
    Parameters:
    
    messageKey - the key as a byte array (null if no key has been set).
    
    message - The message, as a byte array (null if the message was empty or deleted).
    
    partition - The partition the message has originated from.
    
    offset - the offset of the message in the original source (for example the Kafka offset).
    
    Returns:
    
    The deserialized message as an object (null if the message cannot be deserialized).
    
    Throws:
    
    IOException
  - deserialize
```
default T deserialize(org.apache.kafka.clients.consumer.ConsumerRecord<byte[],byte[]> record)
               throws IOException
```
    Deprecated.
    
    Description copied from interface: KafkaDeserializationSchema
    
    Deserializes the Kafka record.
    
    Specified by:
    
    deserialize in interface KafkaDeserializationSchema<T>
    
    Parameters:
    
    record - Kafka record to be deserialized.
    
    Returns:
    
    The deserialized message as an object (null if the message cannot be deserialized).
    
    Throws:
    
    IOException