io.permazen.kv.mvstore

Class CursorIterator

java.lang.Object

io.permazen.kv.mvstore.CursorIterator

All Implemented Interfaces:

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

public class CursorIterator
extends Object

Forward KVPair iterator based on an underlying Cursor.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.h2.mvstore.MVMap<byte[],byte[]>	mvmap

Constructor Summary

Constructors

Constructor and Description
CursorIterator(org.h2.mvstore.Cursor<byte[],byte[]> cursor, byte[] maxKey) Constructor for a read-only instance.
CursorIterator(org.h2.mvstore.MVMap<byte[],byte[]> mvmap, org.h2.mvstore.Cursor<byte[],byte[]> cursor, byte[] maxKey) Constructor.

Method Summary

Modifier and Type	Method and Description
protected boolean	boundsCheck(byte[] key)
void	close()
protected KVPair	findNext()
org.h2.mvstore.MVMap<byte[],byte[]>	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

wrap, wrap

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

mvmap

protected final org.h2.mvstore.MVMap<byte[],byte[]> mvmap

Constructor Detail

CursorIterator

public CursorIterator(org.h2.mvstore.Cursor<byte[],byte[]> cursor,
                      byte[] maxKey)

Constructor for a read-only instance.

Attempts to invoke remove() will result in UnsupportedOperationException.

Parameters:

cursor - the underlying Cursor

maxKey - maximum key (exclusive), or null for no maximum (end at the largest key)

Throws:

IllegalArgumentException - if cursor is null

CursorIterator

public CursorIterator(org.h2.mvstore.MVMap<byte[],byte[]> mvmap,
                      org.h2.mvstore.Cursor<byte[],byte[]> cursor,
                      byte[] maxKey)

Constructor.

Parameters:

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

cursor - the underlying Cursor

maxKey - maximum key (exclusive), or null for no maximum (end at the largest key)

Throws:

IllegalArgumentException - if cursor is null

Method Detail

findNext

protected KVPair findNext()

boundsCheck

protected boolean boundsCheck(byte[] key)

toString

public String toString()

Overrides:

toString in class Object

getMVMap

public org.h2.mvstore.MVMap<byte[],byte[]> 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 CloseableIterator<KVPair>

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable