LastPositionFinder
, GroundedIterator
, LookaheadIterator
, SequenceIterator
, UnfailingIterator
NodeListIterator
public class ListIterator extends java.lang.Object implements UnfailingIterator, LastPositionFinder, LookaheadIterator, GroundedIterator
GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
Constructor | Description |
---|---|
ListIterator(java.util.List list) |
Create a ListIterator over a given List
|
ListIterator(java.util.List list,
int length) |
Create a ListIterator over the leading part of a given List
|
Modifier and Type | Method | Description |
---|---|---|
void |
close() |
Close the iterator.
|
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 |
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.
|
boolean |
hasNext() |
Determine whether there are more items to come.
|
GroundedValue |
materialize() |
Return a SequenceValue 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 ListIterator(java.util.List list)
list
- the list: all objects in the list must be instances of Item
public ListIterator(java.util.List list, int length)
list
- the list: all objects in the list must be instances of Item
length
- the number of items to be includedpublic boolean hasNext()
LookaheadIterator
SequenceIterator.LOOKAHEAD
hasNext
in interface LookaheadIterator
public Item next()
UnfailingIterator
next
in interface SequenceIterator
next
in interface UnfailingIterator
public Item current()
UnfailingIterator
current
in interface SequenceIterator
current
in interface UnfailingIterator
public int position()
UnfailingIterator
position
in interface SequenceIterator
position
in interface UnfailingIterator
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 int getLastPosition()
LastPositionFinder
SequenceIterator.LAST_POSITION_FINDER
getLastPosition
in interface LastPositionFinder
public SequenceIterator getAnother()
UnfailingIterator
getAnother
in interface SequenceIterator
getAnother
in interface UnfailingIterator
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.public GroundedValue materialize()
materialize
in interface GroundedIterator