DBIterator

All Superinterfaces:: AutoCloseable, Closeable, Iterator<Map.Entry<byte[],byte[]>>

All Known Implementing Classes:: SeekingIteratorAdapter

public interface DBIterator extends Iterator<Map.Entry<byte[],byte[]>>, Closeable

Method Summary

Modifier and Type

Method

Description

boolean

hasPrev()

Map.Entry<byte[],byte[]>

peekNext()

Returns the next element in the iteration, without advancing the iteration.

Map.Entry<byte[],byte[]>

peekPrev()

Map.Entry<byte[],byte[]>

prev()

void

seek(byte[] key)

Repositions the iterator so the key of the next BlockElement returned greater than or equal to the specified targetKey.

void

seekToFirst()

Repositions the iterator so is is at the beginning of the Database.

void

seekToLast()

Repositions the iterator so it is at the end of of the Database.

Methods inherited from interface java.io.Closeable
close

Methods inherited from interface java.util.Iterator
forEachRemaining, hasNext, next, remove

Method Details
- seek
  
  void seek(byte[] key)
  
  Repositions the iterator so the key of the next BlockElement returned greater than or equal to the specified targetKey.
- seekToFirst
  
  void seekToFirst()
  
  Repositions the iterator so is is at the beginning of the Database.
- peekNext
  
  Map.Entry<byte[],byte[]> peekNext()
  
  Returns the next element in the iteration, without advancing the iteration.
- hasPrev
  
  boolean hasPrev()
  
  Returns:
  
  true if there is a previous entry in the iteration.
- prev
  
  Map.Entry<byte[],byte[]> prev()
  
  Returns:
  
  the previous element in the iteration and rewinds the iteration.
- peekPrev
  
  Map.Entry<byte[],byte[]> peekPrev()
  
  Returns:
  
  the previous element in the iteration, without rewinding the iteration.
- seekToLast
  
  void seekToLast()
  
  Repositions the iterator so it is at the end of of the Database.