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

Class FieldsFromArray<OUT>

java.lang.Object

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

Type Parameters:

OUT - The type of the output array. If out is set to String, the output of the extractor will be a String[]. If it is set to String[] the output will be String[][].

All Implemented Interfaces:

Serializable, Extractor<Object,OUT[]>

@Internal
public class FieldsFromArray<OUT>
extends Object
implements Extractor<Object,OUT[]>

Extracts multiple fields from an array and puts them into a new array of the specified type.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FieldsFromArray(Class<OUT> clazz, int... indexes)	Extracts multiple fields from an array and puts them in the given order into a new array of the specified type.

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

FieldsFromArray

public FieldsFromArray(Class<OUT> clazz,
 int... indexes)

Extracts multiple fields from an array and puts them in the given order into a new array of the specified type.

Parameters:

clazz - the Class object representing the component type of the new array

indexes - The indexes of the fields to be extracted. Any order is possible, but not more than 255 fields due to limitations in Array.newInstance(Class, int...).

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