## net.sf.saxon.expr
Class AppendIterator

    java.lang.Object
      net.sf.saxon.expr.AppendIterator

All Implemented Interfaces:
  SequenceIterator

public class AppendIterator
extends java.lang.Object
implements SequenceIterator

Iterator that concatenates the results of two supplied iterators

Constructor Summary
`AppendIterator(SequenceIterator first, Expression second, XPathContext context)` This form of constructor is designed to delay getting an iterator for the second expression until it is actually needed.

Method Summary
`Item` `current()` Get the current value in the sequence (the one returned by the most recent call on next()).
`SequenceIterator` `getAnother()` Get another SequenceIterator that iterates over the same items as the original, but which is repositioned at the start of the sequence.
`Item` `next()` Get the next item in the sequence.
`int` `position()` Get the current position.

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

Constructor Detail

### AppendIterator

    public AppendIterator(SequenceIterator first,
                          Expression second,
                          XPathContext context)

  This form of constructor is designed to delay getting an iterator for the second expression until it is actually needed. This gives savings in cases where the iteration is aborted prematurely.

Parameters:
  `first` - Iterator over the first operand
  `second` - The second operand
  `context` - The dynamic context for evaluation of the second operand

Method Detail

### next

    public Item next()
              throws XPathException

  Description copied from interface: `SequenceIterator`
  Get the next item in the sequence.

  Specified by:
    `next` in interface `SequenceIterator`
  Returns:
    the next item, or null if there are no more items.
  Throws:
    `XPathException` - if an error occurs retrieving the next item

### current

    public Item current()

  Description copied from interface: `SequenceIterator`
  Get the current value in the sequence (the one returned by the most recent call on next()). This will be null before the first call of next().

  Specified by:
    `current` in interface `SequenceIterator`
  Returns:
    the current item, the one most recently returned by a call on next(); or null, if next() has not been called, or if the end of the sequence has been reached.

### position

    public int position()

  Description copied from interface: `SequenceIterator`
  Get the current position. This will be zero before the first call on next(), otherwise it will be the number of times that next() has been called.

  Specified by:
    `position` in interface `SequenceIterator`
  Returns:
    the current position, the position of the item returned by the most recent call of next()

### getAnother

    public SequenceIterator getAnother()
                                throws XPathException

  Description copied from interface: `SequenceIterator`
  Get another SequenceIterator that iterates over the same items as the original, but which is repositioned at the start of the sequence.

  Specified by:
    `getAnother` in interface `SequenceIterator`
  Returns:
    a SequenceIterator that iterates over the same items, positioned before the first item
  Throws:
    `XPathException` - if any error occurs