Sum.SumFnElaborator

java.lang.Object
- net.sf.saxon.expr.elab.Elaborator
- - net.sf.saxon.expr.elab.ItemElaborator
  - - net.sf.saxon.functions.Sum.SumFnElaborator

Enclosing class:: Sum

public static class Sum.SumFnElaborator
extends ItemElaborator

Constructor Summary

Constructors
Constructor Description

SumFnElaborator()

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`.

Methods inherited from class net.sf.saxon.expr.elab.ItemElaborator
eagerly, elaborateForBoolean, elaborateForPull, elaborateForPush, 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
  - SumFnElaborator
```
public SumFnElaborator()
```
- Method Detail
  - 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.
    
    Specified by:
    
    elaborateForItem in class ItemElaborator
    
    Returns:
    
    an evaluator for the expression that returns an Item, or null to represent an empty sequence.