SwitchExpression.SwitchExprElaborator

java.lang.Object
- net.sf.saxon.expr.elab.Elaborator
- - net.sf.saxon.expr.elab.PullElaborator
  - - com.saxonica.ee.optim.SwitchExpression.SwitchExprElaborator

Enclosing class:

SwitchExpression
```
public static class SwitchExpression.SwitchExprElaborator
extends PullElaborator
```
Elaborator for a "Switch" expression (typically an xsl:choose that tests one expression against a list of constants: not exactly equivalent to an XQuery 3.1 switch expression).
Provides "push" and "pull" implementations, as well as a singleton implementation.

Constructor Summary

Constructors
Constructor Description

SwitchExprElaborator()

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail
  - SwitchExprElaborator
```
public SwitchExprElaborator()
```
- Method Detail
  - 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