Package net.sf.saxon.expr.elab

Class ComplexNodePushElaborator

java.lang.Object

net.sf.saxon.expr.elab.Elaborator

net.sf.saxon.expr.elab.FallbackElaborator

net.sf.saxon.expr.elab.ComplexNodePushElaborator

Direct Known Subclasses:

ComputedElement.ComputedElementElaborator, FixedElement.FixedElementElaborator

public abstract class ComplexNodePushElaborator
extends FallbackElaborator

Elaborator for element construction expressions (both fixed and computed). This class provides pull and single-item evaluation of these instructions; these invoke the corresponding push evaluator which must be implemented in a subclass.

Constructor Summary

Constructors

Constructor	Description
ComplexNodePushElaborator()

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.FallbackElaborator

eagerly, elaborateForBoolean, elaborateForUnicodeString, lazily

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

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

Methods inherited from class java.lang.Object

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

Constructor Details

ComplexNodePushElaborator

public ComplexNodePushElaborator()

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

Overrides:

elaborateForPull in class FallbackElaborator

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 FallbackElaborator

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 FallbackElaborator

Returns:

an evaluator for the expression in push mode