Package org.apache.flink.formats.json

Class JsonRowDataSerializationSchema

java.lang.Object

org.apache.flink.formats.json.JsonRowDataSerializationSchema

All Implemented Interfaces:

Serializable, SerializationSchema<RowData>

@Internal
public class JsonRowDataSerializationSchema
extends Object
implements SerializationSchema<RowData>

Serialization schema that serializes an object of Flink internal data structure into a JSON bytes.

Serializes the input Flink object into a JSON string and converts it into byte[].

Result byte[] messages can be deserialized using JsonRowDataDeserializationSchema or JsonParserRowDataDeserializationSchema.

See Also:

Serialized Form

Nested Class Summary

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

SerializationSchema.InitializationContext

Constructor Summary

Constructors

Constructor	Description
JsonRowDataSerializationSchema(RowType rowType, TimestampFormat timestampFormat, JsonFormatOptions.MapNullKeyMode mapNullKeyMode, String mapNullKeyLiteral, boolean encodeDecimalAsPlainNumber, boolean ignoreNullFields)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	hashCode()
void	open(SerializationSchema.InitializationContext context)	Initialization method for the schema.
byte[]	serialize(RowData row)	Serializes the incoming element to a specified type.

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonRowDataSerializationSchema

public JsonRowDataSerializationSchema(RowType rowType,
                                      TimestampFormat timestampFormat,
                                      JsonFormatOptions.MapNullKeyMode mapNullKeyMode,
                                      String mapNullKeyLiteral,
                                      boolean encodeDecimalAsPlainNumber,
                                      boolean ignoreNullFields)

Method Detail

open

public void open(SerializationSchema.InitializationContext context)
          throws Exception

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<RowData>

Parameters:

context - Contextual information that can be used during initialization.

Throws:

Exception

serialize

public byte[] serialize(RowData row)

Description copied from interface: SerializationSchema

Serializes the incoming element to a specified type.

Specified by:

serialize in interface SerializationSchema<RowData>

Parameters:

row - The incoming element to be serialized

Returns:

The serialized element.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object