net.sf.saxon.expr
Class ForExpression.EventMappingAction

java.lang.Object
  net.sf.saxon.expr.ForExpression.EventMappingAction

All Implemented Interfaces:

EventMappingFunction

Enclosing class:

ForExpression

protected static class ForExpression.EventMappingAction
extends Object
implements EventMappingFunction

The EventMappingAction represents the action to be taken for each item in the source sequence. It acts as the EventMappingFunction for the mapping iterator, and also provides the Binding of the position variable (at $n) in XQuery, if used.

Constructor Summary

ForExpression.EventMappingAction(XPathContext context, int slotNumber, PositionVariable positionBinding, Expression action)

Method Summary

EventIterator

map(Item item) Map one item to a sequence of pull events.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ForExpression.EventMappingAction

public ForExpression.EventMappingAction(XPathContext context,
                                        int slotNumber,
                                        PositionVariable positionBinding,
                                        Expression action)

Method Detail

map

public EventIterator map(Item item)
                  throws XPathException

Description copied from interface: EventMappingFunction

Map one item to a sequence of pull events.

Specified by:

map in interface EventMappingFunction

Parameters:

item - The item to be mapped.

Returns:

one of the following: (a) an EventIterator over the sequence of items that the supplied input item maps to, or (b) null if it maps to an empty sequence.

Throws:

XPathException