ecologylab.generic
Class HashMapWriteSynch<K,V>

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<K,V>
          ecologylab.generic.HashMapWriteSynchBase<K,V>
              ecologylab.generic.HashMapWriteSynch<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<K,V>

Direct Known Subclasses:

HashMapFromStringsWriteSynch

public class HashMapWriteSynch<K,V>
extends HashMapWriteSynchBase<K,V>

Hashed data structure with synchronized writes/deletes and unsynchronized reads.

Author:

andruid, robinson

See Also:

Serialized Form

Constructor Summary

HashMapWriteSynch()

HashMapWriteSynch(int arg0)

HashMapWriteSynch(int arg0, float arg1)

HashMapWriteSynch(java.util.Map<? extends K,? extends V> arg0)

Method Summary

V	getOrCreateAndPutIfNew(K key, ValueFactory<K,V> factory) If there is already an entry, return it.
V	getOrPutIfNew(K key, V value) If there is already an entry, return it.

Methods inherited from class ecologylab.generic.HashMapWriteSynchBase

putAll, remove

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, 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

equals, hashCode

Constructor Detail

HashMapWriteSynch

public HashMapWriteSynch(int arg0,
                         float arg1)

HashMapWriteSynch

public HashMapWriteSynch(int arg0)

HashMapWriteSynch

public HashMapWriteSynch()

HashMapWriteSynch

public HashMapWriteSynch(java.util.Map<? extends K,? extends V> arg0)

Method Detail

getOrPutIfNew

public V getOrPutIfNew(K key,
                       V value)

If there is already an entry, return it. Otherwise, add the entry, and return null.

NB: NEVER replaces an existing entry.

Overrides:

getOrPutIfNew in class HashMapWriteSynchBase<K,V>

getOrCreateAndPutIfNew

public V getOrCreateAndPutIfNew(K key,
                                ValueFactory<K,V> factory)

If there is already an entry, return it. Otherwise, create an entry with the factory.

Returns:

The entry matching key, found or constructed.