org.apache.flink.streaming.examples.statemachine.kafka

Class EventDeSerializationSchema

java.lang.Object

org.apache.flink.streaming.examples.statemachine.kafka.EventDeSerializationSchema

All Implemented Interfaces:

Serializable, DeserializationSchema<Event>, SerializationSchema<Event>, ResultTypeQueryable<Event>

public class EventDeSerializationSchema
extends Object
implements DeserializationSchema<Event>, SerializationSchema<Event>

A serializer and deserializer for the Event type.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.api.common.serialization.DeserializationSchema

DeserializationSchema.InitializationContext

Nested classes/interfaces inherited from interface org.apache.flink.api.common.serialization.SerializationSchema

SerializationSchema.InitializationContext

Constructor Summary

Constructors

Constructor and Description
EventDeSerializationSchema()

Method Summary

Modifier and Type	Method and Description
Event	deserialize(byte[] message) Deserializes the byte message.
TypeInformation<Event>	getProducedType() Gets the data type (as a TypeInformation) produced by this function or input format.
boolean	isEndOfStream(Event nextElement) Method to decide whether the element signals the end of the stream.
byte[]	serialize(Event evt) 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

Methods inherited from interface org.apache.flink.api.common.serialization.DeserializationSchema

deserialize, open

Methods inherited from interface org.apache.flink.api.common.serialization.SerializationSchema

open

Constructor Detail

EventDeSerializationSchema

public EventDeSerializationSchema()

Method Detail

serialize

public byte[] serialize(Event evt)

Description copied from interface: SerializationSchema

Serializes the incoming element to a specified type.

Specified by:

serialize in interface SerializationSchema<Event>

Parameters:

evt - The incoming element to be serialized

Returns:

The serialized element.

deserialize

public Event deserialize(byte[] message)
                  throws IOException

Description copied from interface: DeserializationSchema

Deserializes the byte message.

Specified by:

deserialize in interface DeserializationSchema<Event>

Parameters:

message - The message, as a byte array.

Returns:

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

Throws:

IOException

isEndOfStream

public boolean isEndOfStream(Event nextElement)

Description copied from interface: DeserializationSchema

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 DeserializationSchema<Event>

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 TypeInformation<Event> 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<Event>

Returns:

The data type produced by this function or input format.