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org.apache.gora.persistency
Class StatefulHashMap<K,V>

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<K,V>
          org.apache.gora.persistency.StatefulHashMap<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>, StatefulMap<K,V>

public class StatefulHashMap<K,V>
extends HashMap<K,V>
implements StatefulMap<K,V>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

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

Map.Entry<K,V>

Constructor Summary

StatefulHashMap()
Create an empty instance.

StatefulHashMap(Map<K,V> m)
Create an instance with initial entries.

Method Summary

void	clear()
void	clearStates()
State	getState(K key)
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
void	putState(K key, State state)
V	remove(Object key)
void	reuse() Reuse will clear the map completely with states.
Map<K,State>	states()

Methods inherited from class java.util.HashMap

clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, size, values

Constructor Detail

StatefulHashMap

public StatefulHashMap()

Create an empty instance.

StatefulHashMap

public StatefulHashMap(Map<K,V> m)

Create an instance with initial entries. These entries are added stateless; in other words the statemap will be clear after the construction.

Parameters:

m - The map with initial entries.

Method Detail

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class HashMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class HashMap<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

Overrides:

putAll in class HashMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class HashMap<K,V>

getState

public State getState(K key)

Specified by:

getState in interface StatefulMap<K,V>

clearStates

public void clearStates()

Specified by:

clearStates in interface StatefulMap<K,V>

putState

public void putState(K key,
                     State state)

Specified by:

putState in interface StatefulMap<K,V>

states

public Map<K,State> states()

Specified by:

states in interface StatefulMap<K,V>

reuse

public void reuse()

Description copied from interface: StatefulMap

Reuse will clear the map completely with states. This is different from Map.clear() in that the latter only sets entries to deleted.

Specified by:

reuse in interface StatefulMap<K,V>