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## net.sf.saxon.expr
Class ForExpression.MappingAction

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

All Implemented Interfaces:
  ItemMappingFunction, MappingFunction, StatefulMappingFunction

Enclosing class:
  ForExpression

    protected static class ForExpression.MappingAction

extends Object
implements MappingFunction, ItemMappingFunction, StatefulMappingFunction

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

Constructor Summary
`ForExpression.MappingAction(XPathContext context, int slotNumber, int pslot, Expression action)`

Method Summary
`StatefulMappingFunction` | `getAnother()` Return a clone of this MappingFunction, with the state reset to its state at the beginning of the underlying iteration
`SequenceIterator` | `map(Item item)` Map one item to a sequence.
`Item` | `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

### ForExpression.MappingAction

    public ForExpression.MappingAction(XPathContext context,
                                       int slotNumber,
                                       int pslot,
                                       Expression action)

Method Detail

### map

    public SequenceIterator map(Item item)
                         throws XPathException

  Description copied from interface: `MappingFunction`
  Map one item to a sequence.

  Specified by:
    `map` in interface `MappingFunction`
  Parameters:
    `item` - The item to be mapped.
  Returns:
    one of the following: (a) a SequenceIterator over the sequence of items that the supplied input item maps to, or (b) null if it maps to an empty sequence.
  Throws:
    `XPathException`

### mapItem

    public Item mapItem(Item item)
                 throws XPathException

  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.
  Throws:
    `XPathException`

### getAnother

    public StatefulMappingFunction getAnother()

  Description copied from interface: `StatefulMappingFunction`
  Return a clone of this MappingFunction, with the state reset to its state at the beginning of the underlying iteration

  Specified by:
    `getAnother` in interface `StatefulMappingFunction`
  Returns:
    a clone of this MappingFunction

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.