public interface TxnMap<K,V> extends Map<K,V>
Modifier and Type | Method and Description |
---|---|
void |
clear(Txn txn)
Removes all of the mappings from this map (optional operation).
|
boolean |
containsKey(Txn txn,
Object key)
Returns true if this map contains a mapping for the specified
key.
|
boolean |
containsValue(Txn txn,
Object value)
Returns true if this map maps one or more keys to the
specified value.
|
TxnSet<Map.Entry<K,V>> |
entrySet()
Returns a
TxnSet view of the mappings contained in this map. |
TxnSet<Map.Entry<K,V>> |
entrySet(Txn txn)
Returns a
TxnSet view of the mappings contained in this map. |
V |
get(Txn txn,
Object key)
Returns the value to which the specified key is mapped,
or
null if this map contains no mapping for the key. |
Stm |
getStm()
|
boolean |
isEmpty(Txn txn)
Returns true if this map contains no key-value mappings.
|
TxnSet<K> |
keySet()
Returns a
TxnSet view of the keys contained in this map. |
TxnSet<K> |
keySet(Txn txn)
Returns a
TxnSet view of the keys contained in this map. |
V |
put(Txn txn,
K key,
V value)
Associates the specified value with the specified key in this map
(optional operation).
|
void |
putAll(Txn txn,
Map<? extends K,? extends V> m)
Copies all of the mappings from the specified map to this map
(optional operation).
|
V |
remove(Txn txn,
Object key)
Removes the mapping for a key from this map if it is present
(optional operation).
|
int |
size(Txn txn)
Returns the number of key-value mappings in this map.
|
String |
toString(Txn txn) |
TxnCollection<V> |
values()
Returns a
TxnCollection view of the values contained in this map. |
TxnCollection<V> |
values(Txn txn)
Returns a
TxnCollection view of the values contained in this map. |
clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, equals, forEach, get, getOrDefault, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size
Stm getStm()
int size(Txn txn)
txn
- boolean isEmpty(Txn txn)
txn
- void clear(Txn txn)
txn
- UnsupportedOperationException
- if the clear operation
is not supported by this mapV get(Txn txn, Object key)
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.
txn
- key
- the key whose associated value is to be returnednull
if this map contains no mapping for the keyClassCastException
- if the key is of an inappropriate type for
this map (optional)NullPointerException
- if the specified key is null and this map
does not permit null keys (optional)boolean containsKey(Txn txn, Object key)
txn
- key
- key whose presence in this map is to be testedClassCastException
- if the key is of an inappropriate type for
this map (optional)NullPointerException
- if the specified key is null and this map
does not permit null keys (optional)boolean containsValue(Txn txn, Object value)
txn
- value
- value whose presence in this map is to be testedClassCastException
- if the value is of an inappropriate type for
this map (optional)NullPointerException
- if the specified value is null and this
map does not permit null values (optional)V put(Txn txn, K key, V value)
m.containsKey(k)
would return
true.)txn
- key
- key with which the specified value is to be associatedvalue
- value to be associated with the specified keyUnsupportedOperationException
- if the put operation
is not supported by this mapClassCastException
- if the class of the specified key or value
prevents it from being stored in this mapNullPointerException
- if the specified key or value is null
and this map does not permit null keys or valuesIllegalArgumentException
- if some property of the specified key
or value prevents it from being stored in this mapvoid putAll(Txn txn, Map<? extends K,? extends V> m)
put(k, v)
on this map once
for each mapping from key k to value v in the
specified map. The behavior of this operation is undefined if the
specified map is modified while the operation is in progress.txn
- m
- mappings to be stored in this mapUnsupportedOperationException
- if the putAll operation
is not supported by this mapClassCastException
- if the class of a key or value in the
specified map prevents it from being stored in this mapNullPointerException
- if the specified map is null, or if
this map does not permit null keys or values, and the
specified map contains null keys or valuesIllegalArgumentException
- if some property of a key or value in
the specified map prevents it from being stored in this mapV remove(Txn txn, Object key)
(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.
txn
- key
- key whose mapping is to be removed from the mapUnsupportedOperationException
- if the remove operation
is not supported by this mapClassCastException
- if the key is of an inappropriate type for
this map (optional)NullPointerException
- if the specified key is null and this
map does not permit null keys (optional)TxnCollection<V> values()
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.TxnCollection<V> values(Txn txn)
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.txn
- TxnSet<K> keySet()
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.TxnSet<K> keySet(Txn txn)
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.txn
- TxnSet<Map.Entry<K,V>> entrySet()
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.TxnSet<Map.Entry<K,V>> entrySet(Txn txn)
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.txn
- Copyright © 2020. All rights reserved.