org.hypergraphdb.transaction

Class TxMap<K,V>

java.lang.Object

org.hypergraphdb.transaction.TxMap<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

Map<K,V>

public class TxMap<K,V>
extends Object
implements Map<K,V>

A transactional map - every operation on this map is conducted within a transaction and becomes void if the transaction is aborted. This map doesn't support nulls as values - a null indicates absence of a value.

Author:

Borislav Iordanov

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	TxMap.Box

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected RefResolver<Object,TxMap.Box>	boxGetter
protected Map<K,TxMap.Box>	M
protected VBox<Integer>	sizebox
protected HGTransactionManager	txManager

Constructor Summary

Constructors

Constructor and Description
TxMap(HGTransactionManager tManager, Map backingMap) The constructor expects a HGTransactionManager and the map to be used to hold the entries.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
protected TxMap.Box	getBox(Object key)
boolean	isEmpty()
Set<K>	keySet()
int	mapSize()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)
int	size()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

M

protected Map<K,TxMap.Box> M

txManager

protected HGTransactionManager txManager

boxGetter

protected RefResolver<Object,TxMap.Box> boxGetter

sizebox

protected VBox<Integer> sizebox

Constructor Detail

TxMap

public TxMap(HGTransactionManager tManager,
     Map backingMap)

The constructor expects a HGTransactionManager and the map to be used to hold the entries. The backingMap parameter must be an empty map and it is not fully typed since internal object wrappers will be used to manage the transactional aspect.

Method Detail

getBox

protected TxMap.Box getBox(Object key)

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

put

public V put(K key,
    V value)

Specified by:

put in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

mapSize

public int mapSize()

size

public int size()

Specified by:

size in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>