Package org.h2.mvstore.tx

Class TransactionMap.RepeatableIterator<K,V,X>

java.lang.Object

org.h2.mvstore.tx.TransactionMap.TMIterator<K,V,X>

org.h2.mvstore.tx.TransactionMap.RepeatableIterator<K,V,X>

Type Parameters:

K - the type of keys

X - the type of elements

All Implemented Interfaces:

Iterator<X>

Enclosing class:

TransactionMap<K,V>

private static final class TransactionMap.RepeatableIterator<K,V,X>
extends TransactionMap.TMIterator<K,V,X>

The iterator for repeatable read and serializable isolation levels.

Field Summary

Fields

Modifier and Type	Field	Description
private final DataType<K>	keyType
private K	snapshotKey
private Object	snapshotValue
private final Cursor<K,VersionedValue<V>>	uncommittedCursor
private K	uncommittedKey
private V	uncommittedValue

Fields inherited from class org.h2.mvstore.tx.TransactionMap.TMIterator

committingTransactions, current, cursor, transactionId

Constructor Summary

Constructors

Constructor	Description
RepeatableIterator(TransactionMap<K,V> transactionMap, K from, K to, boolean reverse, boolean forEntries)

Method Summary

Modifier and Type	Method	Description
X	fetchNext()	Fetches a next entry.
private void	fetchSnapshot()
private void	fetchUncommitted()

Methods inherited from class org.h2.mvstore.tx.TransactionMap.TMIterator

hasNext, next, toElement

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Field Details

keyType

private final DataType<K> keyType

snapshotKey

private K snapshotKey

snapshotValue

private Object snapshotValue

uncommittedCursor

private final Cursor<K,VersionedValue<V>> uncommittedCursor

uncommittedKey

private K uncommittedKey

uncommittedValue

private V uncommittedValue

Constructor Details

RepeatableIterator

RepeatableIterator(TransactionMap<K,V> transactionMap,
 K from,
 K to,
 boolean reverse,
 boolean forEntries)

Method Details

fetchNext

public X fetchNext()

Description copied from class: TransactionMap.TMIterator

Fetches a next entry. This method cannot be used together with TransactionMap.TMIterator.hasNext() and TransactionMap.TMIterator.next().

Specified by:

fetchNext in class TransactionMap.TMIterator<K,V,X>

Returns:

the next entry or null

fetchSnapshot

private void fetchSnapshot()

fetchUncommitted

private void fetchUncommitted()