Package org.iq80.leveldb.impl

Class SeekingIteratorAdapter

java.lang.Object

org.iq80.leveldb.impl.SeekingIteratorAdapter

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<Map.Entry<byte[],byte[]>>, DBIterator

public class SeekingIteratorAdapter
extends Object
implements DBIterator

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SeekingIteratorAdapter.DbEntry

Field Summary

Fields

Modifier and Type	Field	Description
private final AtomicBoolean	closed
private final SnapshotSeekingIterator	seekingIterator

Constructor Summary

Constructors

Constructor	Description
SeekingIteratorAdapter(SnapshotSeekingIterator seekingIterator)

Method Summary

Modifier and Type	Method	Description
private SeekingIteratorAdapter.DbEntry	adapt(Map.Entry<Slice,Slice> entry)
void	close()
boolean	hasNext()
boolean	hasPrev()
SeekingIteratorAdapter.DbEntry	next()
SeekingIteratorAdapter.DbEntry	peekNext()	Returns the next element in the iteration, without advancing the iteration.
SeekingIteratorAdapter.DbEntry	peekPrev()
SeekingIteratorAdapter.DbEntry	prev()
void	remove()
void	seek(byte[] targetKey)	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 class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Details

seekingIterator

private final SnapshotSeekingIterator seekingIterator

closed

private final AtomicBoolean closed

Constructor Details

SeekingIteratorAdapter

public SeekingIteratorAdapter(SnapshotSeekingIterator seekingIterator)

Method Details

seekToFirst

public void seekToFirst()

Description copied from interface: DBIterator

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

Specified by:

seekToFirst in interface DBIterator

seek

public void seek(byte[] targetKey)

Description copied from interface: DBIterator

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

Specified by:

seek in interface DBIterator

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Map.Entry<byte[],byte[]>>

next

public SeekingIteratorAdapter.DbEntry next()

Specified by:

next in interface Iterator<Map.Entry<byte[],byte[]>>

peekNext

public SeekingIteratorAdapter.DbEntry peekNext()

Description copied from interface: DBIterator

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

Specified by:

peekNext in interface DBIterator

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

remove

public void remove()

Specified by:

remove in interface Iterator<Map.Entry<byte[],byte[]>>

adapt

private SeekingIteratorAdapter.DbEntry adapt(Map.Entry<Slice,Slice> entry)

seekToLast

public void seekToLast()

Description copied from interface: DBIterator

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

Specified by:

seekToLast in interface DBIterator

hasPrev

public boolean hasPrev()

Specified by:

hasPrev in interface DBIterator

Returns:

true if there is a previous entry in the iteration.

prev

public SeekingIteratorAdapter.DbEntry prev()

Specified by:

prev in interface DBIterator

Returns:

the previous element in the iteration and rewinds the iteration.

peekPrev

public SeekingIteratorAdapter.DbEntry peekPrev()

Specified by:

peekPrev in interface DBIterator

Returns:

the previous element in the iteration, without rewinding the iteration.