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java.lang.Objectorg.axiondb.engine.rowiterators.SingleRowIterator
public class SingleRowIterator
A RowIterator
over a single Row
.
Constructor Summary | |
---|---|
SingleRowIterator(Row row)
|
Method Summary | |
---|---|
void |
add(Row row)
Add a Row at the current position in my underlying collection, or throw
UnsupportedOperationException . |
Row |
current()
Returns the last Row returned by me (by RowIterator.next() ,RowIterator.previous() ,
RowIterator.first() ,RowIterator.last() , etc.). |
int |
currentIndex()
Returns the index of the RowIterator.current() row, if any. |
Row |
first()
Returns the first Row in the list, positioning the cursor to just before
the first Row in the list. |
boolean |
hasCurrent()
Returns true if I have a current Row . |
boolean |
hasNext()
Returns true if I have more Row s when traversing the list
in the forward direction. |
boolean |
hasPrevious()
Returns true if I have more Row s when traversing the list
in the reverse direction. |
boolean |
isEmpty()
Returns true if there are no rows to report with this iterator. |
Row |
last()
Returns the last Row in the list, positioning the cursor to just after the
last Row in the list. |
Row |
next()
Returns the next Row in the list, or throws
NoSuchElementException if no next Row exists. |
int |
next(int count)
Sets the current iterator position to currentIndex() + count; this will not set the current row, peekPrevious() may be used to return the current row. |
int |
nextIndex()
Returns the index of the RowIterator.next() row, if any, or the number of elements is
the iterator if we've reached the end. |
Row |
peekNext()
Return the value that would be returned by a call to RowIterator.next() , if any, but
don't update my position. |
Row |
peekPrevious()
Return the value that would be returned by a call to RowIterator.previous() , if any,
but don't update my position. |
Row |
previous()
Returns the previous Row in the list, or throws
NoSuchElementException if no next Row exists. |
int |
previous(int count)
Sets the current iterator position to currentIndex() - count; this will not set the current row, peekNext() may be used to return the current row. |
int |
previousIndex()
Returns the index of the RowIterator.previous() row, if any, or -1 if we're add the
beginning of the list. |
void |
remove()
Set the Row at the current position in my underlying collection, or throw
UnsupportedOperationException . |
void |
reset()
Re-initialize this RowIterator to its initial state (positioned just
before the first Row in the list). |
void |
set(Row row)
Set the Row at the current position in my underlying collection, or throw
UnsupportedOperationException . |
int |
size()
Retunrs the current size of the underlaying row collection |
String |
toString()
|
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public SingleRowIterator(Row row)
Method Detail |
---|
public void add(Row row)
RowIterator
Row
at the current position in my underlying collection, or throw
UnsupportedOperationException
. (Optional operation.)
add
in interface RowIterator
public Row current()
RowIterator
Row
returned by me (by RowIterator.next()
,RowIterator.previous()
,
RowIterator.first()
,RowIterator.last()
, etc.).
current
in interface RowIterator
public int currentIndex()
RowIterator
RowIterator.current()
row, if any.
currentIndex
in interface RowIterator
public Row first()
RowIterator
Row
in the list, positioning the cursor to just before
the first Row
in the list. (In other words, after first
is
called both RowIterator.next()
and RowIterator.current()
will return the first row in the
list.)
first
in interface RowIterator
public boolean hasCurrent()
RowIterator
true
if I have a current Row
. (In other words,
returns true
iff RowIterator.current()
would return a Row
rather
than throwing an exception.)
hasCurrent
in interface RowIterator
public boolean hasNext()
RowIterator
true
if I have more Row
s when traversing the list
in the forward direction. (In other words, returns true
iff
RowIterator.next()
would return a Row
rather than throwing an exception.)
hasNext
in interface RowIterator
public boolean hasPrevious()
RowIterator
true
if I have more Row
s when traversing the list
in the reverse direction. (In other words, returns true
iff
RowIterator.previous()
would return a Row
rather than throwing an exception.)
hasPrevious
in interface RowIterator
public boolean isEmpty()
RowIterator
true
if there are no rows to report with this iterator.
isEmpty
in interface RowIterator
public Row last()
RowIterator
Row
in the list, positioning the cursor to just after the
last Row
in the list. (In other words, after last
is called
both RowIterator.previous()
and RowIterator.current()
will return the last row in the list.)
last
in interface RowIterator
public Row next()
RowIterator
Row
in the list, or throws
NoSuchElementException
if no next Row
exists.
next
in interface RowIterator
public int next(int count) throws AxionException
RowIterator
next
in interface RowIterator
AxionException
public int nextIndex()
RowIterator
RowIterator.next()
row, if any, or the number of elements is
the iterator if we've reached the end.
nextIndex
in interface RowIterator
public Row peekNext()
RowIterator
RowIterator.next()
, if any, but
don't update my position.
peekNext
in interface RowIterator
public Row peekPrevious()
RowIterator
RowIterator.previous()
, if any,
but don't update my position.
peekPrevious
in interface RowIterator
public Row previous()
RowIterator
Row
in the list, or throws
NoSuchElementException
if no next Row
exists.
previous
in interface RowIterator
public int previous(int count) throws AxionException
RowIterator
previous
in interface RowIterator
AxionException
public int previousIndex()
RowIterator
RowIterator.previous()
row, if any, or -1 if we're add the
beginning of the list.
previousIndex
in interface RowIterator
public void remove()
RowIterator
Row
at the current position in my underlying collection, or throw
UnsupportedOperationException
. (Optional operation.)
remove
in interface RowIterator
public void reset()
RowIterator
RowIterator
to its initial state (positioned just
before the first Row
in the list).
reset
in interface RowIterator
public void set(Row row)
RowIterator
Row
at the current position in my underlying collection, or throw
UnsupportedOperationException
. (Optional operation.)
set
in interface RowIterator
public int size() throws AxionException
RowIterator
size
in interface RowIterator
AxionException
public String toString()
toString
in class Object
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