LastPositionFinder
, GroundedIterator
, SequenceIterator
public final class MemoClosure.ProgressiveIterator extends java.lang.Object implements SequenceIterator, LastPositionFinder, GroundedIterator
Modifier and Type | Field | Description |
---|---|---|
(package private) int |
position |
ATOMIZABLE, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
Constructor | Description |
---|---|
ProgressiveIterator() |
Modifier and Type | Method | Description |
---|---|---|
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.
|
int |
getLastPosition() |
Get the last position (that is, the number of items in the sequence)
|
int |
getProperties() |
Get properties of this iterator, as a bit-significant integer.
|
Value |
materialize() |
Return a value containing all the items in the sequence returned by this
SequenceIterator
|
Item |
next() |
Get the next item in the sequence.
|
int |
position() |
Get the current position.
|
public Item next() throws XPathException
SequenceIterator
next
in interface SequenceIterator
XPathException
- if an error occurs retrieving the next itempublic Item current()
SequenceIterator
current
in interface SequenceIterator
public int position()
SequenceIterator
This method does not change the state of the iterator.
position
in interface SequenceIterator
public SequenceIterator getAnother()
SequenceIterator
This method allows access to all the items in the sequence without disturbing the current position of the iterator. Internally, its main use is in evaluating the last() function.
This method does not change the state of the iterator.
getAnother
in interface SequenceIterator
public int getLastPosition() throws XPathException
getLastPosition
in interface LastPositionFinder
XPathException
public Value materialize() throws XPathException
materialize
in interface GroundedIterator
XPathException
public int getProperties()
getProperties
in interface SequenceIterator
SequenceIterator.GROUNDED
and SequenceIterator.LAST_POSITION_FINDER
. It is always
acceptable to return the value zero, indicating that there are no known special properties.