Package net.sf.saxon.expr
Class LocalVariableReference.LocalVariableReferenceElaborator
java.lang.Object
net.sf.saxon.expr.elab.Elaborator
net.sf.saxon.expr.elab.PullElaborator
net.sf.saxon.expr.LocalVariableReference.LocalVariableReferenceElaborator
- Enclosing class:
LocalVariableReference
Elaborator for a local variable reference, for example
$var
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioneagerly()
Get a function that evaluates the underlying expression eagerlyGet a function that evaluates the underlying expression in the form of aItem
.Get a function that evaluates the underlying expression in the form of aSequenceIterator
Get a function that evaluates the underlying expression in push mode, by writing events to anOutputter
lazily
(boolean repeatable, boolean lazyEvaluationRequired) Get a function that evaluates the underlying expression lazilyvoid
setExpression
(Expression expr) Set the expression being elaboratedMethods inherited from class net.sf.saxon.expr.elab.PullElaborator
elaborateForBoolean, elaborateForUnicodeString
Methods inherited from class net.sf.saxon.expr.elab.Elaborator
elaborateForString, elaborateForUpdate, getConfiguration, getExpression, handleNullString, handleNullUnicodeString, handlePossiblyNullString, handlePossiblyNullUnicodeString
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Constructor Details
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LocalVariableReferenceElaborator
public LocalVariableReferenceElaborator()
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Method Details
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setExpression
Description copied from class:Elaborator
Set the expression being elaborated- Overrides:
setExpression
in classElaborator
- Parameters:
expr
- the expression
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eagerly
Description copied from class:Elaborator
Get a function that evaluates the underlying expression eagerly- Overrides:
eagerly
in classPullElaborator
- Returns:
- an evaluator for the expression that returns a
GroundedValue
. The classSequenceEvaluator
is declared to return aSequence
not aGroundedValue
; we can't specialize it because it's a limitation of C# delegates, but the result can safely be cast toGroundedValue
.
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lazily
Description copied from class:Elaborator
Get a function that evaluates the underlying expression lazily- Overrides:
lazily
in classElaborator
- Parameters:
repeatable
- true if the resultingSequence
must be usable repeatedly; false if it only needs to be used oncelazyEvaluationRequired
- true if the expression MUST be evaluated lazily, for example to prevent spurious errors or side-effects if it has been lifted out of a loop- Returns:
- an evaluator for the expression that returns a
Sequence
(which may be a lazy sequence)
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elaborateForPull
Description copied from class:Elaborator
Get a function that evaluates the underlying expression in the form of aSequenceIterator
- Specified by:
elaborateForPull
in classPullElaborator
- Returns:
- an evaluator for the expression that returns a
SequenceIterator
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elaborateForPush
Description copied from class:Elaborator
Get a function that evaluates the underlying expression in push mode, by writing events to anOutputter
- Overrides:
elaborateForPush
in classPullElaborator
- Returns:
- an evaluator for the expression in push mode
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elaborateForItem
Description copied from class:Elaborator
Get a function that evaluates the underlying expression in the form of aItem
. This must only be called for expressions whose result has cardinality zero or one.- Overrides:
elaborateForItem
in classPullElaborator
- Returns:
- an evaluator for the expression that returns an
Item
, or null to represent an empty sequence.
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