Package io.permazen.kv.mvstore

Class CursorIterator

java.lang.Object

io.permazen.kv.mvstore.CursorIterator

All Implemented Interfaces:

CloseableIterator<KVPair>, Closeable, AutoCloseable, Iterator<KVPair>

@ThreadSafe
public class CursorIterator
extends Object
implements CloseableIterator<KVPair>

KVPair iterator based on an underlying Cursor.

The remove() method is implemented by invoking MVMap.remove(Object).

Constructor Summary

Constructors

Constructor	Description
CursorIterator(org.h2.mvstore.MVMap<ByteData,ByteData> mvmap, ByteData minKey, ByteData maxKey, boolean reverse)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	close()
org.h2.mvstore.MVMap<ByteData,ByteData>	getMVMap()	Get the MVMap underlying this instance, if any.
boolean	hasNext()
KVPair	next()
void	remove()
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.permazen.util.CloseableIterator

toStream

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

CursorIterator

public CursorIterator(org.h2.mvstore.MVMap<ByteData,ByteData> mvmap,
 ByteData minKey,
 ByteData maxKey,
 boolean reverse)

Constructor.

Parameters:

mvmap - the underlying MVMap (used to implement remove()), or null for read-only operation

minKey - minimum key (inclusive), or null for no minimum

maxKey - maximum key (exclusive), or null for no maximum

reverse - true if cursor iterates keys in descending order

Throws:

IllegalArgumentException - if cursor is null

Method Details

getMVMap

public org.h2.mvstore.MVMap<ByteData,ByteData> getMVMap()

Get the MVMap underlying this instance, if any.

Returns:

underlying MVMap, or null if none provided

next

public KVPair next()

Specified by:

next in interface Iterator<KVPair>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<KVPair>

remove

public void remove()

Specified by:

remove in interface Iterator<KVPair>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface CloseableIterator<KVPair>

toString

public String toString()

Overrides:

toString in class Object