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## net.sf.saxon.om
Class PrependIterator

    java.lang.Object
      net.sf.saxon.om.PrependIterator

All Implemented Interfaces:
  AxisIterator, SequenceIterator, UnfailingIterator

    public class PrependIterator

extends Object
implements AxisIterator

An iterator over nodes, that prepends a given node to the nodes returned by another iterator. Used to modify an iterator over axis A to one that iterates over A-OR-SELF.

Field Summary

Fields inherited from interface net.sf.saxon.om.SequenceIterator
`GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD`

Constructor Summary
`PrependIterator(NodeInfo start, AxisIterator base)`

Method Summary
`Value` | `atomize()` Return the atomized value of the current node.
`Item` | `current()` Get the current item in the sequence.
`SequenceIterator` | `getAnother()` Get another iterator over the same sequence of items, positioned at the start of the sequence
`int` | `getProperties()` Get properties of this iterator, as a bit-significant integer.
`CharSequence` | `getStringValue()` Return the string value of the current node.
`AxisIterator` | `iterateAxis(byte axis, NodeTest test)` Return an iterator over an axis, starting at the current node.
`boolean` | `moveNext()` Move to the next node, without returning it.
`Item` | `next()` Get the next item in the sequence.
`int` | `position()` Get the current position

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

Constructor Detail

### PrependIterator

    public PrependIterator(NodeInfo start,
                           AxisIterator base)

Method Detail

### moveNext

    public boolean moveNext()

  Move to the next node, without returning it. Returns true if there is a next node, false if the end of the sequence has been reached. After calling this method, the current node may be retrieved using the current() function.

  Specified by:
    `moveNext` in interface `AxisIterator`

### next

    public Item next()

  Get the next item in the sequence.

  Specified by:
    `next` in interface `SequenceIterator`
  Specified by:
    `next` in interface `UnfailingIterator`
  Returns:
    the next Item. If there are no more nodes, return null.

### current

    public Item current()

  Get the current item in the sequence.

  Specified by:
    `current` in interface `SequenceIterator`
  Specified by:
    `current` in interface `UnfailingIterator`
  Returns:
    the current item, that is, the item most recently returned by next()

### position

    public int position()

  Get the current position

  Specified by:
    `position` in interface `SequenceIterator`
  Specified by:
    `position` in interface `UnfailingIterator`
  Returns:
    the position of the current item (the item most recently returned by next()), starting at 1 for the first node

### iterateAxis

    public AxisIterator iterateAxis(byte axis,
                                    NodeTest test)

  Return an iterator over an axis, starting at the current node.

  Specified by:
    `iterateAxis` in interface `AxisIterator`
  Parameters:
    `axis` - the axis to iterate over, using a constant such as `Axis.CHILD`
    `test` - a predicate to apply to the nodes before returning them.
  Throws:
    `NullPointerException` - if there is no current node

### atomize

    public Value atomize()
                  throws XPathException

  Return the atomized value of the current node.

  Specified by:
    `atomize` in interface `AxisIterator`
  Returns:
    the atomized value.
  Throws:
    `NullPointerException` - if there is no current node
    `XPathException`

### getStringValue

    public CharSequence getStringValue()

  Return the string value of the current node.

  Specified by:
    `getStringValue` in interface `AxisIterator`
  Returns:
    the string value, as an instance of CharSequence.
  Throws:
    `NullPointerException` - if there is no current node

### getAnother

    public SequenceIterator getAnother()

  Get another iterator over the same sequence of items, positioned at the start of the sequence

  Specified by:
    `getAnother` in interface `SequenceIterator`
  Specified by:
    `getAnother` in interface `UnfailingIterator`
  Returns:
    a new iterator over the same sequence

### getProperties

    public int getProperties()

  Get properties of this iterator, as a bit-significant integer.

  Specified by:
    `getProperties` in interface `SequenceIterator`
  Returns:
    the properties of this iterator. This will be some combination of properties such as `SequenceIterator.GROUNDED`, `SequenceIterator.LAST_POSITION_FINDER`, and `SequenceIterator.LOOKAHEAD`. It is always acceptable to return the value zero, indicating that there are no known special properties. It is acceptable for the properties of the iterator to change depending on its state.

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Copyright (C) Michael H. Kay. All rights reserved.