org.apache.flink.streaming.api.functions.windowing.delta.extractor

Class FieldFromTuple<OUT>

java.lang.Object

org.apache.flink.streaming.api.functions.windowing.delta.extractor.FieldFromTuple<OUT>

Type Parameters:

OUT - The type of the extracted field.

All Implemented Interfaces:

Serializable, Extractor<Tuple,OUT>

@Internal
public class FieldFromTuple<OUT>
extends Object
implements Extractor<Tuple,OUT>

Extracts a single field out of a tuple.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FieldFromTuple() Extracts the first field (id 0) from the tuple
FieldFromTuple(int fieldId) Extracts the field with the given id from the tuple.

Method Summary

Modifier and Type	Method and Description
OUT	extract(Tuple in) Extracts/Converts the given input to an object of the output type

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldFromTuple

public FieldFromTuple()

Extracts the first field (id 0) from the tuple

FieldFromTuple

public FieldFromTuple(int fieldId)

Extracts the field with the given id from the tuple.

Parameters:

fieldId - The id of the field which will be extracted from the tuple.

Method Detail

extract

public OUT extract(Tuple in)

Description copied from interface: Extractor

Extracts/Converts the given input to an object of the output type

Specified by:

extract in interface Extractor<Tuple,OUT>

Parameters:

in - the input data

Returns:

the extracted/converted data