Package org.eclipse.rdf4j.query.algebra.evaluation.util

Class OrderComparator

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.util.OrderComparator

All Implemented Interfaces:

Comparator<BindingSet>

public class OrderComparator
extends Object
implements Comparator<BindingSet>

A Comparator on BindingSets that imposes a total ordering by examining supplied Order elements (i.e. the elements of an ORDER BY clause), falling back on a custom predictable ordering for BindingSet elements if no ordering is established on the basis of the Order elements.

Author:

James Leigh, Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
OrderComparator(EvaluationStrategy strategy, Order order, ValueComparator cmp, QueryEvaluationContext context)

Method Summary

Modifier and Type	Method	Description
int	compare(BindingSet o1, BindingSet 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

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

Constructor Details

OrderComparator

public OrderComparator(EvaluationStrategy strategy,
 Order order,
 ValueComparator cmp,
 QueryEvaluationContext context)

Method Details

compare

public int compare(BindingSet o1,
 BindingSet o2)

Specified by:

compare in interface Comparator<BindingSet>