Class NaiveTxnHashMap<K,V>
-
Nested Class Summary
Nested Classes -
Field Summary
FieldsModifier and TypeFieldDescription(package private) static final int
(package private) static final float
The load factor used when none specified in constructor.(package private) final float
The load factor for the hash table.(package private) static final int
The maximum capacity, used if a higher value is implicitly specified by either of the constructors with arguments.private final TxnInteger
private final TxnRef
<TxnRef<NaiveTxnHashMap.NaiveEntry>[]> private final TxnInteger
Fields inherited from class org.multiverse.collections.AbstractTxnMap
defaultRefFactory, stm
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescription(package private) void
void
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.Returns aTxnSet
view of the mappings contained in this map.Returns the value to which the specified key is mapped, ornull
if this map contains no mapping for the key.private NaiveTxnHashMap<K,
V>.NaiveEntry <K, V> float
(package private) static int
indexFor
(int h, int length) Returns aTxnSet
view of the keys contained in this map.Associates the specified value with the specified key in this map (optional operation).Removes the mapping for a key from this map if it is present (optional operation).(package private) void
int
Returns the number of key-value mappings in this map.(package private) void
transfer
(Txn tx, TxnRef<NaiveTxnHashMap.NaiveEntry>[] newTable) Returns aTxnCollection
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
compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll
-
Field Details
-
DEFAULT_INITIAL_CAPACITY
static final int DEFAULT_INITIAL_CAPACITY- See Also:
-
DEFAULT_LOAD_FACTOR
static final float DEFAULT_LOAD_FACTORThe load factor used when none specified in constructor.- See Also:
-
MAXIMUM_CAPACITY
static final int MAXIMUM_CAPACITYThe maximum capacity, used if a higher value is implicitly specified by either of the constructors with arguments. MUST be a power of two invalid input: '<'= 1invalid input: '<'invalid input: '<'30.- See Also:
-
size
-
table
-
threshold
-
loadFactor
final float loadFactorThe load factor for the hash table.
-
-
Constructor Details
-
NaiveTxnHashMap
-
-
Method Details
-
getLoadFactor
public float getLoadFactor() -
clear
Description copied from interface:TxnMap
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.- Parameters:
tx
-
-
size
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.- Parameters:
tx
-- Returns:
- the number of key-value mappings in this map
-
get
Description copied from interface:TxnMap
Returns the value to which the specified key is mapped, ornull
if this map contains no mapping for the key.More formally, if this map contains a mapping from a key
k
to a valuev
such that(key==null ? k==null : key.equals(k))
, then this method returnsv
; otherwise it returnsnull
. (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 tonull
. ThecontainsKey
operation may be used to distinguish these two cases.- Parameters:
tx
-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
-
getEntry
-
put
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 ifm.containsKey(k)
would return true.)- Parameters:
tx
-key
- key with which the specified value is to be associatedvalue
- 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.)
-
addEntry
-
resize
-
transfer
-
indexFor
static int indexFor(int h, int length) -
remove
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.
- Parameters:
tx
-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
-
entrySet
Description copied from interface:TxnMap
Returns aTxnSet
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.- Parameters:
tx
-- Returns:
- a set view of the mappings contained in this map
-
keySet
Description copied from interface:TxnMap
Returns aTxnSet
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.- Parameters:
tx
-- Returns:
- a set view of the keys contained in this map
-
containsKey
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.)- Parameters:
tx
-key
- key whose presence in this map is to be tested- Returns:
- true if this map contains a mapping for the specified key
-
containsValue
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.- Parameters:
tx
-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
Description copied from interface:TxnMap
Returns aTxnCollection
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.- Parameters:
tx
-- Returns:
- a collection view of the values contained in this map
-