net.sf.saxon.functions
Class Trace.TracingIterator

java.lang.Object
  net.sf.saxon.functions.Trace.TracingIterator

All Implemented Interfaces:

SequenceIterator

Enclosing class:

Trace

public class Trace.TracingIterator
extends Object
implements SequenceIterator

Tracing Iterator class

Field Summary

(package private) SequenceIterator	base
(package private) boolean	empty
(package private) String	label

Constructor Summary

Trace.TracingIterator(SequenceIterator base, String label)

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

Field Detail

base

SequenceIterator base

label

String label

empty

boolean empty

Constructor Detail

Trace.TracingIterator

public Trace.TracingIterator(SequenceIterator base,
                             String label)
                      throws XPathException

Throws:

XPathException

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