org.multiverse.collections
Class NaiveTxnHashMap<K,V>

java.lang.Object
  org.multiverse.collections.AbstractTxnMap<K,V>
      org.multiverse.collections.NaiveTxnHashMap<K,V>

All Implemented Interfaces:

Map<K,V>, TxnMap<K,V>

public final class NaiveTxnHashMap<K,V>
extends AbstractTxnMap<K,V>

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

Fields inherited from class org.multiverse.collections.AbstractTxnMap

defaultRefFactory, stm

Constructor Summary

NaiveTxnHashMap(Stm stm)

Method Summary

void	clear(Txn tx) Removes all of the mappings from this map (optional operation).
boolean	containsKey(Txn tx, Object key) Returns true if this map contains a mapping for the specified key.
boolean	containsValue(Txn tx, Object value) Returns true if this map maps one or more keys to the specified value.
TxnSet<Map.Entry<K,V>>	entrySet(Txn tx) Returns a TxnSet view of the mappings contained in this map.
V	get(Txn tx, Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
float	getLoadFactor()
TxnSet<K>	keySet(Txn tx) Returns a TxnSet view of the keys contained in this map.
V	put(Txn tx, K key, V value) Associates the specified value with the specified key in this map (optional operation).
V	remove(Txn tx, Object key) Removes the mapping for a key from this map if it is present (optional operation).
int	size(Txn tx) Returns the number of key-value mappings in this map.
String	toString(Txn tx)
TxnCollection<V>	values(Txn tx) Returns a TxnCollection view of the values contained in this map.

Methods inherited from class org.multiverse.collections.AbstractTxnMap

clear, containsKey, containsValue, entrySet, get, getStm, isEmpty, isEmpty, keySet, put, putAll, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

NaiveTxnHashMap

public NaiveTxnHashMap(Stm stm)

Method Detail

getLoadFactor

public float getLoadFactor()

clear

public void clear(Txn tx)

Description copied from interface: TxnMap

Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.

size

public int size(Txn tx)

Description copied from interface: TxnMap

Returns the number of key-value mappings in this map. If the map contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.

Returns:

the number of key-value mappings in this map

get

public V get(Txn tx,
             Object key)

Description copied from interface: TxnMap

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

key - the key whose associated value is to be returned

Returns:

the value to which the specified key is mapped, or null if this map contains no mapping for the key

put

public V put(Txn tx,
             K key,
             V value)

Description copied from interface: TxnMap

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map m is said to contain a mapping for a key k if and only if m.containsKey(k) would return true.)

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)

remove

public V remove(Txn tx,
                Object key)

Description copied from interface: TxnMap

Removes the mapping for a key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed. (The map can contain at most one such mapping.)

Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

If this map permits null values, then a return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.

The map will not contain a mapping for the specified key once the call returns.

key - key whose mapping is to be removed from the map

Returns:

the previous value associated with key, or null if there was no mapping for key.

toString

public String toString(Txn tx)

entrySet

public TxnSet<Map.Entry<K,V>> entrySet(Txn tx)

Description copied from interface: TxnMap

Returns a TxnSet view of the mappings contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation, or through the setValue operation on a map entry returned by the iterator) the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Returns:

a set view of the mappings contained in this map

keySet

public TxnSet<K> keySet(Txn tx)

Description copied from interface: TxnMap

Returns a TxnSet view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

Returns:

a set view of the keys contained in this map

containsKey

public boolean containsKey(Txn tx,
                           Object key)

Description copied from interface: TxnMap

Returns true if this map contains a mapping for the specified key. More formally, returns true if and only if this map contains a mapping for a key k such that (key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)

key - key whose presence in this map is to be tested

Returns:

true if this map contains a mapping for the specified key

containsValue

public boolean containsValue(Txn tx,
                             Object value)

Description copied from interface: TxnMap

Returns true if this map maps one or more keys to the specified value. More formally, returns true if and only if this map contains at least one mapping to a value v such that (value==null ? v==null : value.equals(v)). This operation will probably require time linear in the map size for most implementations of the Map interface.

value - value whose presence in this map is to be tested

Returns:

true if this map maps one or more keys to the specified value

values

public TxnCollection<V> values(Txn tx)

Description copied from interface: TxnMap

Returns a TxnCollection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Returns:

a collection view of the values contained in this map