org.apache.beam.sdk.transforms

Interface SerializableComparator<T>

Type Parameters:

T - type of values being compared

All Superinterfaces:

java.util.Comparator<T>, java.io.Serializable

All Known Implementing Classes:

KV.OrderByKey, KV.OrderByValue

public interface SerializableComparator<T>
extends java.util.Comparator<T>, java.io.Serializable

A Comparator that is also Serializable.

Method Summary

Modifier and Type	Method and Description
static <T,V extends java.lang.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, comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Method Detail

comparing

static <T,V extends java.lang.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)