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

Class FieldFromArray<OUT>

java.lang.Object

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

Type Parameters:

OUT - The type of the extracted field.

All Implemented Interfaces:

Serializable, Extractor<Object,OUT>

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

Extracts a single field out of an array.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FieldFromArray()	Extracts the first field (id 0) from the array.
FieldFromArray(int fieldId)	Extracts the field with the given id from the array.

Method Summary

Modifier and Type	Method	Description
OUT	extract(Object 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 Details

FieldFromArray

public FieldFromArray()

Extracts the first field (id 0) from the array.

FieldFromArray

public FieldFromArray(int fieldId)

Extracts the field with the given id from the array.

Parameters:

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

Method Details

extract

public OUT extract(Object in)

Description copied from interface: Extractor

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

Specified by:

extract in interface Extractor<Object,OUT>

Parameters:

in - the input data

Returns:

the extracted/converted data