E
- The type of element on which this cursor will iteratepublic interface Cursor<E> extends Iterable<E>
Modifier and Type | Method and Description |
---|---|
void |
after(E element)
Prepares this Cursor, so a subsequent call to Cursor#previous() with a
true return value, will have positioned the Cursor on a dataSet element
equal to or less than the element argument but not greater.
|
void |
afterLast()
Positions this Cursor after the last element.
|
boolean |
available()
Determines whether or not a call to get() will succeed.
|
void |
before(E element)
Prepares this Cursor, so a subsequent call to Cursor#next() with a
true return value, will have positioned the Cursor on a dataSet
element equal to or less than the element argument but not greater.
|
void |
beforeFirst()
Positions this Cursor before the first element.
|
void |
close()
Closes this Cursor and frees any resources it my have allocated.
|
void |
close(Exception reason)
Closes this Cursor and frees any resources it my have allocated.
|
boolean |
first()
Positions this Cursor at the first element.
|
E |
get()
Gets the object at the current position.
|
boolean |
isAfterLast()
Is this Cursor positioned after the last element.
|
boolean |
isBeforeFirst()
Is this Cursor positioned before the first element.
|
boolean |
isClosed()
Checks if this Cursor is closed.
|
boolean |
isFirst()
Is this Cursor positioned at the first element.
|
boolean |
isLast()
Is this Cursor positioned at the last element.
|
boolean |
last()
Positions this Cursor at the last element.
|
boolean |
next()
Advances this Cursor to the next position.
|
boolean |
previous()
Advances this Cursor to the previous position.
|
void |
setClosureMonitor(ClosureMonitor monitor)
Sets a non-null closure monitor to associate with this Cursor.
|
boolean available()
void before(E element) throws Exception
element
- the element to be positioned beforeException
- with problems accessing the underlying btreevoid after(E element) throws Exception
element
- the element to be positioned afterException
- if there are problems positioning this cursor or if
this Cursor is closedvoid beforeFirst() throws Exception
Exception
- if there are problems positioning this cursor or if
this Cursor is closedvoid afterLast() throws Exception
Exception
- if there are problems positioning this Cursor or if
this Cursor is closedboolean first() throws Exception
Exception
- if there are problems positioning this Cursor or if
this Cursor is closedboolean isFirst() throws Exception
Exception
- if there are problems querying the position of this Cursor
or if this Cursor is closedboolean isBeforeFirst() throws Exception
Exception
- if there are problems querying the position of this Cursor
or if this Cursor is closedboolean last() throws Exception
Exception
- if there are problems positioning this Cursor or if
this Cursor is closedboolean isLast() throws Exception
Exception
- if there are problems querying the position of this Cursor
or if this Cursor is closedboolean isAfterLast() throws Exception
Exception
- if there are problems querying the position of this Cursor
or if this Cursor is closedboolean isClosed() throws Exception
Exception
- if there are problems determining the cursor's closed stateboolean previous() throws Exception
Exception
- if there are problems advancing to the next positionboolean next() throws Exception
Exception
- if there are problems advancing to this Cursor to
the next position, or if this Cursor is closedE get() throws Exception
Exception
- if the object at this Cursor's current position
cannot be retrieved, or if this Cursor is closedvoid close() throws Exception
Exception
- if for some reason this Cursor could not be closedvoid close(Exception reason) throws Exception
reason
- exception thrown when this Cursor is accessed after closeException
- if for some reason this Cursor could not be closedvoid setClosureMonitor(ClosureMonitor monitor)
monitor
- the monitor to use for detecting Cursor close eventsCopyright © 2003-2014 The Apache Software Foundation. All Rights Reserved.