org.javarosa.core.model

Class EqualityExpressionIndexFilterStrategy

java.lang.Object

org.javarosa.core.model.EqualityExpressionIndexFilterStrategy

All Implemented Interfaces:

FilterStrategy

public class EqualityExpressionIndexFilterStrategy
extends Object
implements FilterStrategy

Uses a (lazily constructed) index to evaluate a predicate for supported expressions - currently just XPathEqExpr where one side is relative to the instance child being filtered. Evaluations are fetched in O(1) time with O(n) expression evaluations only being required the first time a relative side is evaluated.

Constructor Summary

Constructors

Constructor and Description
EqualityExpressionIndexFilterStrategy()

Method Summary

Modifier and Type	Method and Description
List<TreeReference>	filter(DataInstance sourceInstance, TreeReference nodeSet, XPathExpression predicate, List<TreeReference> children, EvaluationContext evaluationContext, Supplier<List<TreeReference>> next)

Methods inherited from class java.lang.Object

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

Constructor Detail

EqualityExpressionIndexFilterStrategy

public EqualityExpressionIndexFilterStrategy()

Method Detail

filter

@NotNull
public List<TreeReference> filter(@NotNull
                                           DataInstance sourceInstance,
                                           @NotNull
                                           TreeReference nodeSet,
                                           @NotNull
                                           XPathExpression predicate,
                                           @NotNull
                                           List<TreeReference> children,
                                           @NotNull
                                           EvaluationContext evaluationContext,
                                           @NotNull
                                           Supplier<List<TreeReference>> next)

Specified by:

filter in interface FilterStrategy