Package net.sf.saxon.expr

Class ItemChecker.ItemCheckerElaborator

java.lang.Object

net.sf.saxon.expr.elab.Elaborator

net.sf.saxon.expr.elab.PullElaborator

net.sf.saxon.expr.ItemChecker.ItemCheckerElaborator

Enclosing class:

ItemChecker

public static class ItemChecker.ItemCheckerElaborator
extends PullElaborator

Elaborator for a treat as expression, which is usually system-generated by the type checking phase of the compiler

Constructor Summary

Constructors

Constructor	Description
ItemCheckerElaborator()

Method Summary

Modifier and Type	Method	Description
ItemEvaluator	elaborateForItem()	Get a function that evaluates the underlying expression in the form of a Item.
PullEvaluator	elaborateForPull()	Get a function that evaluates the underlying expression in the form of a SequenceIterator
PushEvaluator	elaborateForPush()	Get a function that evaluates the underlying expression in push mode, by writing events to an Outputter

Methods inherited from class net.sf.saxon.expr.elab.PullElaborator

eagerly, elaborateForBoolean, elaborateForUnicodeString

Methods inherited from class net.sf.saxon.expr.elab.Elaborator

elaborateForString, elaborateForUpdate, getConfiguration, getExpression, handleNullString, handleNullUnicodeString, handlePossiblyNullString, handlePossiblyNullUnicodeString, lazily, setExpression

Methods inherited from class java.lang.Object

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

Constructor Details

ItemCheckerElaborator

public ItemCheckerElaborator()

Method Details

elaborateForPull

public PullEvaluator elaborateForPull()

Description copied from class: Elaborator

Get a function that evaluates the underlying expression in the form of a SequenceIterator

Specified by:

elaborateForPull in class PullElaborator

Returns:

an evaluator for the expression that returns a SequenceIterator

elaborateForItem

public ItemEvaluator elaborateForItem()

Description copied from class: Elaborator

Get a function that evaluates the underlying expression in the form of a Item. This must only be called for expressions whose result has cardinality zero or one.

Overrides:

elaborateForItem in class PullElaborator

Returns:

an evaluator for the expression that returns an Item, or null to represent an empty sequence.

elaborateForPush

public PushEvaluator elaborateForPush()

Description copied from class: Elaborator

Get a function that evaluates the underlying expression in push mode, by writing events to an Outputter

Overrides:

elaborateForPush in class PullElaborator

Returns:

an evaluator for the expression in push mode