org.h2.mvstore

类 Cursor<K,V>

java.lang.Object

org.h2.mvstore.Cursor<K,V>

类型参数:

K - the key type

V - the value type

所有已实现的接口:

Iterator<K>

public final class Cursor<K,V>
extends Object
implements Iterator<K>

A cursor to iterate over elements in ascending or descending order.

构造器概要

构造器

构造器和说明
Cursor(RootReference<K,V> rootReference, K from, K to)
Cursor(RootReference<K,V> rootReference, K from, K to, boolean reverse)

方法概要

限定符和类型	方法和说明
K	getKey() Get the last read key if there was one.
V	getValue() Get the last read value if there was one.
boolean	hasNext()
K	next()
void	skip(long n) Skip over that many entries.

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Iterator

forEachRemaining, remove

构造器详细资料

Cursor

public Cursor(RootReference<K,V> rootReference,
              K from,
              K to)

Cursor

public Cursor(RootReference<K,V> rootReference,
              K from,
              K to,
              boolean reverse)

参数:

rootReference - of the tree

from - starting key (inclusive), if null start from the first / last key

to - ending key (inclusive), if null there is no boundary

reverse - true if tree should be iterated in key's descending order

方法详细资料

hasNext

public boolean hasNext()

指定者:

hasNext 在接口中 Iterator<K>

next

public K next()

指定者:

next 在接口中 Iterator<K>

getKey

public K getKey()

Get the last read key if there was one.

返回:

the key or null

getValue

public V getValue()

Get the last read value if there was one.

返回:

the value or null

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.

参数:

n - the number of entries to skip