org.apache.flink.streaming.util.serialization

Class KeyedDeserializationSchemaWrapper<T>

java.lang.Object

org.apache.flink.streaming.util.serialization.KeyedDeserializationSchemaWrapper<T>

Type Parameters:

T - The type created by the deserialization schema.

All Implemented Interfaces:

Serializable, org.apache.flink.api.java.typeutils.ResultTypeQueryable<T>, KeyedDeserializationSchema<T>

public class KeyedDeserializationSchemaWrapper<T>
extends Object
implements KeyedDeserializationSchema<T>

A simple wrapper for using the DeserializationSchema with the KeyedDeserializationSchema interface

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KeyedDeserializationSchemaWrapper(DeserializationSchema<T> deserializationSchema)

Method Summary

Methods

Modifier and Type	Method and Description
T	deserialize(byte[] messageKey, byte[] message, String topic, int partition, long offset) Deserializes the byte message.
org.apache.flink.api.common.typeinfo.TypeInformation<T>	getProducedType()
boolean	isEndOfStream(T nextElement) Method to decide whether the element signals the end of the stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyedDeserializationSchemaWrapper

public KeyedDeserializationSchemaWrapper(DeserializationSchema<T> deserializationSchema)

Method Detail

deserialize

public T deserialize(byte[] messageKey,
            byte[] message,
            String topic,
            int partition,
            long offset)
              throws IOException

Description copied from interface: KeyedDeserializationSchema

Deserializes the byte message.

Specified by:

deserialize in interface KeyedDeserializationSchema<T>

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) @return The deserialized message as an object.

Throws:

IOException

isEndOfStream

public boolean isEndOfStream(T nextElement)

Description copied from interface: KeyedDeserializationSchema

Method to decide whether the element signals the end of the stream. If true is returned the element won't be emitted.

Specified by:

isEndOfStream in interface KeyedDeserializationSchema<T>

Parameters:

nextElement - The element to test for the end-of-stream signal.

Returns:

True, if the element signals end of stream, false otherwise.

getProducedType

public org.apache.flink.api.common.typeinfo.TypeInformation<T> getProducedType()

Specified by:

getProducedType in interface org.apache.flink.api.java.typeutils.ResultTypeQueryable<T>