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net.sf.saxon.expr

Interface ItemMappingFunction

Known Implementing Classes:
NumberFn
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.

Method Summary

Item
map(Item item)
Map one item to another item.

Method Details

map

public Item map(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.

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