org.apache.flink.python.util

Class PythonConnectorUtils.SecondColumnSerializationSchema<T>

java.lang.Object

org.apache.flink.python.util.PythonConnectorUtils.SecondColumnSerializationSchema<T>

Type Parameters:

T - The actual data type wrapped in the Row.

All Implemented Interfaces:

Serializable, SerializationSchema<Row>

Enclosing class:

PythonConnectorUtils

public static class PythonConnectorUtils.SecondColumnSerializationSchema<T>
extends Object
implements SerializationSchema<Row>

A SerializationSchema for Row that only serialize the second column using a wrapped SerializationSchema for T.

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 and Description
SecondColumnSerializationSchema(SerializationSchema<T> wrappedSchema) The constructor.

Method Summary

Modifier and Type	Method and Description
void	open(SerializationSchema.InitializationContext context) Initialization method for the schema.
byte[]	serialize(Row row) 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

SecondColumnSerializationSchema

public SecondColumnSerializationSchema(SerializationSchema<T> wrappedSchema)

The constructor.

Parameters:

wrappedSchema - The SerializationSchema to serialize T objects.

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<Row>

Parameters:

context - Contextual information that can be used during initialization.

Throws:

Exception

serialize

public byte[] serialize(Row row)

Description copied from interface: SerializationSchema

Serializes the incoming element to a specified type.

Specified by:

serialize in interface SerializationSchema<Row>

Parameters:

row - The incoming element to be serialized

Returns:

The serialized element.