public interface BasicCache
Modifier and Type | Method and Description |
---|---|
Object |
get(Object key)
Returns the value to which this map maps the specified key.
|
Object |
put(Object key,
Object value,
int sizeEstimate)
Put the entry into the cache.
|
Object |
remove(Object key)
Removes the mapping for this key from this map if it is present (optional
operation).
|
Object put(Object key, Object value, int sizeEstimate)
key
- key to which value will be associated.value
- the value to which the given key is associated.sizeEstimate
- an estimated size of the value in bytes.null
if
there was no mapping for key. A null
return can also
indicate that the map previously associated null
with
the specified key, if the implementation supports null
valuesMap.put(Object, Object)
Object get(Object key)
null
if the map contains no mapping for this key. 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.
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.)
key
- key whose associated value is to be returned.null
if the map contains no mapping for this key.ClassCastException
- if the key is of an inappropriate type for this
map (optional).NullPointerException
- key is null
and this map does not
not permit null
keys (optional).Object remove(Object 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 the map previously associated the key, or
null
if the map contained no mapping for this key. (A
null
return can also indicate that the map previously associated
null
with the specified key if the implementation supports
null
values.) 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.null
if
there was no mapping for key.ClassCastException
- if the key is of an inappropriate type for this
map (optional).NullPointerException
- if the key is null
and this map
does not not permit null
keys (optional).UnsupportedOperationException
- if the remove
method is
not supported by this map.Copyright © 2024 levigo holding gmbh. All rights reserved.