Package org.apache.flink.formats.json

Class JsonSerializationSchema<T>

java.lang.Object

org.apache.flink.formats.json.JsonSerializationSchema<T>

All Implemented Interfaces:

Serializable, SerializationSchema<T>

@PublicEvolving
public class JsonSerializationSchema<T>
extends Object
implements SerializationSchema<T>

SerializationSchema that serializes an object to a JSON String.

See Also:

Serialized Form

Nested Class Summary

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

SerializationSchema.InitializationContext

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper	mapper

Constructor Summary

Constructors

Constructor	Description
JsonSerializationSchema()
JsonSerializationSchema(SerializableSupplier<org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper> mapperFactory)

Method Summary

Modifier and Type	Method	Description
void	open(SerializationSchema.InitializationContext context)	Initialization method for the schema.
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

Field Detail

mapper

protected transient org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper mapper

Constructor Detail

JsonSerializationSchema

public JsonSerializationSchema()

JsonSerializationSchema

public JsonSerializationSchema(SerializableSupplier<org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper> mapperFactory)

Method Detail

open

public void open(SerializationSchema.InitializationContext context)

Description copied from interface: SerializationSchema

Initialization method for the schema. It is called before the actual working methods SerializationSchema.serialize(Object) and thus suitable for one time setup work.

The provided SerializationSchema.InitializationContext can be used to access additional features such as e.g. registering user metrics.

Specified by:

open in interface SerializationSchema<T>

Parameters:

context - Contextual information that can be used during initialization.

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.