ItemFilter

java.lang.Object
- net.sf.saxon.expr.ItemFilter

All Implemented Interfaces:

ItemMappingFunction
```
public class ItemFilter
extends java.lang.Object
implements ItemMappingFunction
```
ItemMapper is an implementation of ItemMappingFunction that wraps a predicate function typically supplied as a lambda expression: unlike a standard Predicate, however, the test is allowed to throw an XPathException.
NOTE: Java allows a lambda expression to be used wherever an ItemMappingFunction is needed, but C# does not (it's not possible in C# to have a class implementing a delegate). So if a lambda expression is wanted, use an ItemFilter or ItemMapper as a wrapper.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface ItemFilter.Lambda

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Item`	`mapItem(Item item)`	Map one item to another item.
`static ItemFilter`	`of(ItemFilter.Lambda lambda)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - of
```
public static ItemFilter of(ItemFilter.Lambda lambda)
```
  - mapItem
```
public Item mapItem(Item item)
             throws XPathException
```
    Map one item to another item.
    
    Specified by:
    
    mapItem in interface ItemMappingFunction
    
    Parameters:
    
    item - The input item to be mapped.
    
    Returns:
    
    either the output item, or null.
    
    Throws:
    
    XPathException - if a dynamic error occurs