public abstract class AbstractObject2IntFunction<K> extends Object implements Object2IntFunction<K>, Serializable
Optional operations just throw an UnsupportedOperationException
. Generic versions of accessors delegate to
the corresponding type-specific counterparts following the interface rules
(they take care of returning null
on a missing key).
This class handles directly a default return
value (including methods to access
it). Instances of classes inheriting from this class have just to return
defRetValue
to denote lack of a key in type-specific methods. The value
is serialized.
Implementing subclasses have just to provide type-specific get()
,
type-specific containsKey()
, and size()
methods.
Modifier and Type | Method and Description |
---|---|
void |
clear()
Removes all associations from this function (optional operation).
|
int |
defaultReturnValue()
Gets the default return value.
|
void |
defaultReturnValue(int rv)
Sets the default return value.
|
Integer |
get(Object ok)
Delegates to the corresponding type-specific method, taking care of returning
null on a missing key. |
int |
put(K key,
int value)
Adds a pair to the map.
|
Integer |
put(K ok,
Integer ov)
Delegates to the corresponding type-specific method, taking care of returning
null on a missing key. |
Integer |
remove(Object ok)
Delegates to the corresponding type-specific method, taking care of returning
null on a missing key. |
int |
removeInt(Object key)
Removes the mapping with the given key.
|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getInt
containsKey, size
public void defaultReturnValue(int rv)
Object2IntFunction
get()
, put()
and remove()
to
denote that the map does not contain the specified key. It must be
0/false
/null
by default.defaultReturnValue
in interface Object2IntFunction<K>
rv
- the new default return value.Object2IntFunction.defaultReturnValue()
public int defaultReturnValue()
Object2IntFunction
defaultReturnValue
in interface Object2IntFunction<K>
public int put(K key, int value)
Object2IntFunction
put
in interface Object2IntFunction<K>
key
- the key.value
- the value.Function.put(Object,Object)
public int removeInt(Object key)
Object2IntFunction
removeInt
in interface Object2IntFunction<K>
key
- the key.Function.remove(Object)
public void clear()
Function
clear
in interface Function<K,Integer>
Map.clear()
public Integer get(Object ok)
null
on a missing key.
This method must check whether the provided key is in the map using containsKey()
. Thus,
it probes the map twice. Implementors of subclasses should override it with a more efficient method.
get
in interface Function<K,Integer>
ok
- the key.null
if no value was present for the given key.Map.get(Object)
public Integer put(K ok, Integer ov)
null
on a missing key.
This method must check whether the provided key is in the map using containsKey()
. Thus,
it probes the map twice. Implementors of subclasses should override it with a more efficient method.
put
in interface Function<K,Integer>
ok
- the key.ov
- the value.null
if no value was present for the given key.Map.put(Object,Object)
public Integer remove(Object ok)
null
on a missing key.
This method must check whether the provided key is in the map using containsKey()
. Thus,
it probes the map twice. Implementors of subclasses should override it with a more efficient method.
remove
in interface Function<K,Integer>
ok
- the key.null
if no value was present for the given key.Map.remove(Object)