org.apache.druid.query.scan

Class ScanResultValueTimestampComparator

java.lang.Object

org.apache.druid.query.scan.ScanResultValueTimestampComparator

All Implemented Interfaces:

Comparator<ScanResultValue>

public class ScanResultValueTimestampComparator
extends Object
implements Comparator<ScanResultValue>

This comparator class supports comparisons of ScanResultValues based on the timestamp of their first event. Since only the first event is looked at, this Comparator is especially useful for unbatched ScanResultValues (such as in ScanQueryQueryToolChest.mergeResults(org.apache.druid.query.QueryRunner <ScanResultValue>). The comparator takes a scanQuery as a parameter so that it knows the result format (list or compactedList) of Object ScanResultValue#events. It uses this result format to perform a bunch of type casts on the object to get the timestamp then compares the timestamps.

Constructor Summary

Constructors

Constructor and Description
ScanResultValueTimestampComparator(ScanQuery scanQuery)

Method Summary

Modifier and Type	Method and Description
int	compare(ScanResultValue o1, ScanResultValue o2)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

ScanResultValueTimestampComparator

public ScanResultValueTimestampComparator(ScanQuery scanQuery)

Method Detail

compare

public int compare(ScanResultValue o1,
                   ScanResultValue o2)

Specified by:

compare in interface Comparator<ScanResultValue>