KeyFn.SubtreeFilter

java.lang.Object
- net.sf.saxon.functions.KeyFn.SubtreeFilter

All Implemented Interfaces:

ItemMappingFunction

Enclosing class:

KeyFn
```
public static class KeyFn.SubtreeFilter
extends java.lang.Object
implements ItemMappingFunction
```
Mapping class to filter nodes that have the origin node as an ancestor-or-self

- Constructor Summary
  
  Constructors
  Constructor Description
  
  SubtreeFilter(NodeInfo origin)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  NodeInfo mapItem(Item item)
  Map one item to another item.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SubtreeFilter
```
public SubtreeFilter(NodeInfo origin)
```
- Method Detail
  - mapItem
```
public NodeInfo mapItem(Item item)
```
    Description copied from interface: ItemMappingFunction
    
    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.