org.apache.flink.api.common.serialization

Class TypeInformationSerializationSchema<T>

java.lang.Object

org.apache.flink.api.common.serialization.TypeInformationSerializationSchema<T>

Type Parameters:

T - The type to be serialized.

All Implemented Interfaces:

Serializable, DeserializationSchema<T>, SerializationSchema<T>, ResultTypeQueryable<T>

@Public
public class TypeInformationSerializationSchema<T>
extends Object
implements DeserializationSchema<T>, SerializationSchema<T>

A serialization and deserialization schema that uses Flink's serialization stack to transform typed from and to byte arrays.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TypeInformationSerializationSchema(TypeInformation<T> typeInfo, ExecutionConfig ec) Creates a new de-/serialization schema for the given type.
TypeInformationSerializationSchema(TypeInformation<T> typeInfo, TypeSerializer<T> serializer) Creates a new de-/serialization schema for the given type.

Method Summary

Modifier and Type	Method and Description
T	deserialize(byte[] message) Deserializes the byte message.
TypeInformation<T>	getProducedType() Gets the data type (as a TypeInformation) produced by this function or input format.
boolean	isEndOfStream(T nextElement) This schema never considers an element to signal end-of-stream, so this method returns always false.
byte[]	serialize(T element) Serializes the incoming element to a specified type.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeInformationSerializationSchema

public TypeInformationSerializationSchema(TypeInformation<T> typeInfo,
                                          ExecutionConfig ec)

Creates a new de-/serialization schema for the given type.

Parameters:

typeInfo - The type information for the type de-/serialized by this schema.

ec - The execution config, which is used to parametrize the type serializers.

TypeInformationSerializationSchema

public TypeInformationSerializationSchema(TypeInformation<T> typeInfo,
                                          TypeSerializer<T> serializer)

Creates a new de-/serialization schema for the given type.

Parameters:

typeInfo - The type information for the type de-/serialized by this schema.

serializer - The serializer to use for de-/serialization.

Method Detail

deserialize

public T deserialize(byte[] message)

Description copied from interface: DeserializationSchema

Deserializes the byte message.

Specified by:

deserialize in interface DeserializationSchema<T>

Parameters:

message - The message, as a byte array.

Returns:

The deserialized message as an object (null if the message cannot be deserialized).

isEndOfStream

public boolean isEndOfStream(T nextElement)

This schema never considers an element to signal end-of-stream, so this method returns always false.

Specified by:

isEndOfStream in interface DeserializationSchema<T>

Parameters:

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

Returns:

Returns false.

serialize

public byte[] serialize(T element)

Description copied from interface: SerializationSchema

Serializes the incoming element to a specified type.

Specified by:

serialize in interface SerializationSchema<T>

Parameters:

element - The incoming element to be serialized

Returns:

The serialized element.

getProducedType

public TypeInformation<T> getProducedType()

Description copied from interface: ResultTypeQueryable

Gets the data type (as a TypeInformation) produced by this function or input format.

Specified by:

getProducedType in interface ResultTypeQueryable<T>

Returns:

The data type produced by this function or input format.