XPathExpression class sealed

A parsed XPath expression.

Port of org.javarosa.xpath.expr.XPathExpression and its subclasses. Expressions are immutable values: equality and toString match JavaRosa exactly, because the engine keys its dependency graph on them and conformance tests compare their string form.

Implementers

• XPathBinaryOpExpr
• XPathFilterExpr
• XPathFuncExpr
• XPathNumericLiteral
• XPathNumNegExpr
• XPathPathExpr
• XPathStringLiteral
• XPathVariableReference

Annotations

• @immutable

Properties

hashCode → int

Hash of toString, as in JavaRosa.

no setter, override

isIdempotent → bool

Whether evaluating this expression twice in the same form state always gives the same result (used to cache predicate results).

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

containsFunc(String name) → bool

Whether this expression calls the function named name anywhere.

eval(DataInstance? model, EvaluationContext context) → Object

Evaluates against model (usually the context's main instance) in context. The result is a bool, double, String, DateTime, XPathNodeset or a value returned by a custom function.

evalIn(EvaluationContext context) → Object

Evaluates against context's main instance.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

pivot(DataInstance? model, EvaluationContext context, List<Object> pivots, Object sentinel) → Object?

Pivots this expression around sentinel (the validated node's reference), adding CmpPivots to pivots.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

Structural equality, matching JavaRosa's equals.

override