public class SingleNodeIterator extends java.lang.Object implements AxisIterator, ReversibleIterator, LastPositionFinder, GroundedIterator, LookaheadIterator
ATOMIZING, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
Modifier and Type | Method and Description |
---|---|
void |
close()
Close the iterator.
|
int |
getLength()
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.
|
GroundedValue |
getResidue()
Return a GroundedValue containing all the remaining items in the sequence returned by this
SequenceIterator, starting at the current position.
|
SequenceIterator |
getReverseIterator()
Get a new SequenceIterator that returns the same items in reverse order.
|
Item |
getValue() |
boolean |
hasNext()
Determine whether there are more items to come.
|
static AxisIterator |
makeIterator(NodeInfo item)
Factory method.
|
GroundedValue |
materialize()
Return a Value containing all the items in the sequence returned by this
SequenceIterator
|
NodeInfo |
next()
Get the next item in the sequence.
|
public static AxisIterator makeIterator(NodeInfo item)
item
- the item to iterate overpublic boolean hasNext()
hasNext
in interface LookaheadIterator
public NodeInfo next()
UnfailingIterator
next
in interface SequenceIterator
next
in interface AxisIterator
next
in interface UnfailingIterator
public int getLength()
LastPositionFinder
SequenceIterator.LAST_POSITION_FINDER
getLength
in interface LastPositionFinder
public void close()
SequenceIterator
(Currently, closing an iterator is important only when the data is being "pushed" in another thread. Closing the iterator terminates that thread and means that it needs to do no additional work. Indeed, failing to close the iterator may cause the push thread to hang waiting for the buffer to be emptied.)
close
in interface SequenceIterator
public SequenceIterator getReverseIterator()
ReversibleIterator
getReverseIterator
in interface ReversibleIterator
public Item getValue()
public GroundedValue materialize()
materialize
in interface GroundedIterator
public GroundedValue getResidue() throws XPathException
GroundedIterator
getResidue
in interface GroundedIterator
XPathException
- in the cases of subclasses (such as the iterator over a MemoClosure)
which cause evaluation of expressions while materializing the value.public int getProperties()
getProperties
in interface SequenceIterator
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.Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.