org.opends.server.backends.pluggable.spi

Interface SequentialCursor<K,V>

Type Parameters:

K - Type of the record's key

V - Type of the record's value

All Superinterfaces:

AutoCloseable, Closeable

All Known Subinterfaces:

Cursor<K,V>

All Known Implementing Classes:

EmptyCursor

public interface SequentialCursor<K,V>
extends Closeable

Cursor extended with navigation methods.

Method Summary

Modifier and Type	Method and Description
void	close()
void	delete() Deletes the record on which this cursor is currently positioned.
K	getKey() Returns the key of the record on which this cursor is currently positioned.
V	getValue() Returns the value of the record on which this cursor is currently positioned.
boolean	isDefined() Check whether this cursor is currently pointing to valid record.
boolean	next() Moves this cursor to the next record in the tree.

Method Detail

next

boolean next()

Moves this cursor to the next record in the tree.

Returns:

true if the cursor has moved to the next record, false if no next record exists leaving cursor in undefined state.

isDefined

boolean isDefined()

Check whether this cursor is currently pointing to valid record.

Returns:

true if the cursor is pointing to a valid entry, false if cursor is not pointing to a valid entry

getKey

K getKey()
  throws NoSuchElementException

Returns the key of the record on which this cursor is currently positioned.

Returns:

the current record's key.

Throws:

NoSuchElementException - if the cursor is not defined.

getValue

V getValue()
    throws NoSuchElementException

Returns the value of the record on which this cursor is currently positioned.

Returns:

the current record's value.

Throws:

NoSuchElementException - if the cursor is not defined.

delete

void delete()
     throws NoSuchElementException,
            UnsupportedOperationException

Deletes the record on which this cursor is currently positioned. This method does not alter the position of the cursor. In particular, next() must be called in order to point to the next record. The behavior of methods getKey() and getValue() after this method returns is undefined.

Throws:

NoSuchElementException - if the cursor is not defined.

UnsupportedOperationException - if the cursor implementation does not support updates.

close

void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable