org.h2.mvstore
Class Cursor<K>

java.lang.Object
  org.h2.mvstore.Cursor<K>

Type Parameters:

K - the key type

All Implemented Interfaces:

java.util.Iterator<K>

public class Cursor<K>
extends java.lang.Object
implements java.util.Iterator<K>

A cursor to iterate over elements in ascending order.

Field Summary

protected K	current
protected K	from
protected MVMap<K,?>	map
protected CursorPos	pos

Constructor Summary

protected

Cursor(MVMap<K,?> map, Page root, K from)

Method Summary

protected void	fetchNext() Fetch the next entry if there is one.
boolean	hasNext()
protected void	min(Page p, K from) Fetch the next entry that is equal or larger than the given key, starting from the given page.
K	next()
void	remove()
void	skip(long n) Skip over that many entries.

Methods inherited from class java.lang.Object

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

Field Detail

map

protected final MVMap<K,?> map

from

protected final K from

pos

protected CursorPos pos

current

protected K current

Constructor Detail

Cursor

protected Cursor(MVMap<K,?> map,
                 Page root,
                 K from)

Method Detail

next

public K next()

Specified by:

next in interface java.util.Iterator<K>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<K>

skip

public void skip(long n)

Skip over that many entries. This method is relatively fast (for this map implementation) even if many entries need to be skipped.

Parameters:

n - the number of entries to skip

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<K>

min

protected void min(Page p,
                   K from)

Fetch the next entry that is equal or larger than the given key, starting from the given page.

Parameters:

p - the page to start

from - the key to search

fetchNext

protected void fetchNext()

Fetch the next entry if there is one.