Package com.yahoo.search.result

Class ChainableComparator

java.lang.Object

com.yahoo.search.result.ChainableComparator

All Implemented Interfaces:

Comparator<Hit>

Direct Known Subclasses:

FieldComparator, HitGroupsLastComparator, MetaHitsFirstComparator

public abstract class ChainableComparator
extends Object
implements Comparator<Hit>

Superclass of hit comparators which delegates comparisons of hits which are equal according to this comparator, to a secondary comparator.

Author:

bratseth

Constructor Summary

Constructors

Constructor	Description
ChainableComparator(Comparator<Hit> secondaryComparator)	Creates this comparator, given a secondary comparator, or null if there is no secondary

Method Summary

Modifier and Type	Method	Description
int	compare(Hit first, Hit second)	Returns the comparison form the secondary comparison, or 0 if the secondary is null.
Comparator<Hit>	getSecondaryComparator()	Returns the comparator to use to compare hits which are equal according to this, or null if none

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

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

Constructor Detail

ChainableComparator

public ChainableComparator(Comparator<Hit> secondaryComparator)

Creates this comparator, given a secondary comparator, or null if there is no secondary

Method Detail

getSecondaryComparator

public Comparator<Hit> getSecondaryComparator()

Returns the comparator to use to compare hits which are equal according to this, or null if none

compare

public int compare(Hit first,
                   Hit second)

Returns the comparison form the secondary comparison, or 0 if the secondary is null. When overriding this in the subclass, always return super.compare(first,second) at the end of the subclass' implementation.

Specified by:

compare in interface Comparator<Hit>