ComparisonExpressionCacheFilterStrategy class final

Caches the results of node-comparison predicates (and and/or of two of them) on secondary instances, keyed by the context value.

Port of ComparisonExpressionCacheFilterStrategy. JavaRosa's cache grows with every value compared (e.g. each answer typed into a question a cascading select filters on) for as long as the form lives; this one keeps the maxEntries most recently used results (secondary instances don't change, so a dropped result is recomputed the same).

Implemented types

Constructors

ComparisonExpressionCacheFilterStrategy()
Creates a strategy with an empty cache.

Properties

hashCode → int
The hash code for this object.
no setterinherited
length → int
The number of results cached.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

filter(DataInstance sourceInstance, TreeReference nodeset, XPathExpression predicate, List<TreeReference> children, EvaluationContext context, List<TreeReference> next()) → List<TreeReference>
The children of nodeset that pass predicate, or the result of next (the rest of the chain) when this strategy doesn't apply.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

maxEntries → const int
How many results are kept at most.