Class OrderComparator
java.lang.Object
org.eclipse.rdf4j.query.algebra.evaluation.util.OrderComparator
- All Implemented Interfaces:
Comparator<BindingSet>
A
Comparator
on BindingSet
s 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.-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate final Comparator
<BindingSet> private final ValueComparator
private static final org.slf4j.Logger
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Constructor Summary
ConstructorsConstructorDescriptionOrderComparator
(EvaluationStrategy strategy, Order order, ValueComparator cmp, QueryEvaluationContext context) -
Method Summary
Modifier and TypeMethodDescriptionint
compare
(BindingSet o1, BindingSet o2) getSortedBindingNames
(Set<String> bindingNames) private Comparator
<BindingSet> precompileComparator
(EvaluationStrategy strategy, Order order, QueryEvaluationContext context) private boolean
sortedEquals
(List<String> o1bindingNamesOrdered, List<String> o2bindingNamesOrdered) 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
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Field Details
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logger
private static final org.slf4j.Logger logger -
cmp
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bindingContentsComparator
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Constructor Details
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OrderComparator
public OrderComparator(EvaluationStrategy strategy, Order order, ValueComparator cmp, QueryEvaluationContext context)
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Method Details
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precompileComparator
private Comparator<BindingSet> precompileComparator(EvaluationStrategy strategy, Order order, QueryEvaluationContext context) -
compare
- Specified by:
compare
in interfaceComparator<BindingSet>
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sortedEquals
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getSortedBindingNames
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