Package org.apache.beam.sdk.transforms

Interface SerializableComparator<T>

Type Parameters:

T - type of values being compared

All Superinterfaces:

Comparator<T>, Serializable

All Known Implementing Classes:

KV.OrderByKey, KV.OrderByValue

public interface SerializableComparator<T>
extends Comparator<T>, Serializable

A Comparator that is also Serializable.

Method Summary

Static Methods

Modifier and Type	Method	Description
static <T, V extends Comparable<? super V>> SerializableComparator<T>	comparing(SerializableFunction<? super T,? extends V> keyExtractor)	Analogous to Comparator.comparing(Function), except that it takes in a SerializableFunction as the key extractor and returns a SerializableComparator.

Methods inherited from interface java.util.Comparator

compare, equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Method Details

comparing

static <T,
V extends Comparable<? super V>>
SerializableComparator<T> comparing(SerializableFunction<? super T,? extends V> keyExtractor)

Analogous to Comparator.comparing(Function), except that it takes in a SerializableFunction as the key extractor and returns a SerializableComparator.

Type Parameters:

T - the type of element to be compared

V - the type of the Comparable sort key

Parameters:

keyExtractor - the function used to extract the Comparable sort key

Returns:

A SerializableComparator that compares by an extracted key

See Also:

• Comparator.comparing(Function)