ItemMappingFunction

All Known Implementing Classes:

AtomicSequenceConverter.AtomicSequenceMappingFunction, AtomicSequenceConverter.ToStringMappingFunction, EmptyTextNodeRemover, ForExpression.MappingAction, FunctionSequenceCoercer.Coercer, IntegratedFunctionCall.ConfigurationCheckingFunction, ItemFilter, ItemMapper, ItemTypeCheckingFunction, WherePopulated

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ItemMappingFunction
```
ItemMappingFunction is an interface that must be satisfied by an object passed to a ItemMappingIterator. It represents an object which, given an Item, can return either another Item, or null.
NOTE: Java allows a lambda expression to be used where an ItemMappingFunction is needed, but C# does not (it's not possible in C# to have a class implementing a delegate). So if a delegate is wanted, use ItemMapper, to ensure that it works in both languages.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Item mapItem(Item item)
  Map one item to another item.

- Method Detail
  - mapItem
```
Item mapItem(Item item)
      throws XPathException
```
    Map one item to another item.
    
    Parameters:
    
    item - The input item to be mapped.
    
    Returns:
    
    either the output item, or null.
    
    Throws:
    
    XPathException - if a dynamic error occurs