org.iq80.leveldb.iterator

Class InternalTableIterator

java.lang.Object

org.iq80.leveldb.iterator.InternalTableIterator

All Implemented Interfaces:

Closeable, AutoCloseable, InternalIterator, SeekingIterator<InternalKey,Slice>

public class InternalTableIterator
extends Object
implements InternalIterator

Constructor Summary

Constructors

Constructor and Description
InternalTableIterator(SliceIterator tableIterator)

Method Summary

Modifier and Type	Method and Description
void	close()
InternalKey	key() Return the key for the current entry.
boolean	next() Moves to the next entry in the source.
boolean	prev() Moves to the previous entry in the source.
boolean	seek(InternalKey targetKey) Position at the first key in the source that is at or past target.
boolean	seekToFirst() Position at the first key in the source.
boolean	seekToLast() Position at the last key in the source.
String	toString()
boolean	valid() An iterator is either positioned at a key/value pair, or not valid.
Slice	value() Return the value for the current entry.

Methods inherited from class java.lang.Object

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

Constructor Detail

InternalTableIterator

public InternalTableIterator(SliceIterator tableIterator)

Method Detail

valid

public boolean valid()

Description copied from interface: SeekingIterator

An iterator is either positioned at a key/value pair, or not valid.

Specified by:

valid in interface SeekingIterator<InternalKey,Slice>

Returns:

true if the iterator is valid.

seekToFirst

public boolean seekToFirst()

Description copied from interface: SeekingIterator

Position at the first key in the source. The iterator is SeekingIterator.valid() after this call if the source is not empty.

Specified by:

seekToFirst in interface SeekingIterator<InternalKey,Slice>

Returns:

true if iterator is valid, same value will be return by SeekingIterator.valid() after this call

seek

public boolean seek(InternalKey targetKey)

Description copied from interface: SeekingIterator

Position at the first key in the source that is at or past target. The iterator is SeekingIterator.valid() after this call if the source contains an entry that comes at or past target.

Specified by:

seek in interface SeekingIterator<InternalKey,Slice>

Returns:

true if iterator is valid, same value will be return by SeekingIterator.valid() after this call

seekToLast

public boolean seekToLast()

Description copied from interface: SeekingIterator

Position at the last key in the source. The iterator is SeekingIterator.valid() after this call if the source is not empty.

Specified by:

seekToLast in interface SeekingIterator<InternalKey,Slice>

Returns:

true if iterator is valid, same value will be return by SeekingIterator.valid() after this call

next

public boolean next()

Description copied from interface: SeekingIterator

Moves to the next entry in the source. After this call, SeekingIterator.valid() is true if the iterator was not positioned at the last entry in the source. In the case SeekingIterator.seek(Object), SeekingIterator.seekToLast() or SeekingIterator.seekToLast() where not called first call to this method should position iterator on the first entry.

Specified by:

next in interface SeekingIterator<InternalKey,Slice>

Returns:

true if iterator is valid, same value will be return by SeekingIterator.valid() after this call

prev

public boolean prev()

Description copied from interface: SeekingIterator

Moves to the previous entry in the source. Return true if the iterator was not positioned at the first entry in source.

Specified by:

prev in interface SeekingIterator<InternalKey,Slice>

Returns:

true if iterator is valid, same value will be return by SeekingIterator.valid() after this call

key

public InternalKey key()

Description copied from interface: SeekingIterator

Return the key for the current entry. The underlying storage for the returned slice is valid only until the next modification of the iterator.

Specified by:

key in interface SeekingIterator<InternalKey,Slice>

Returns:

current position key

value

public Slice value()

Description copied from interface: SeekingIterator

Return the value for the current entry. The underlying storage for the returned slice is valid only until the next modification of the iterator.

Specified by:

value in interface SeekingIterator<InternalKey,Slice>

Returns:

current position value

toString

public String toString()

Overrides:

toString in class Object

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException