it.unimi.dsi.fastutil.doubles
Class AbstractDouble2CharFunction
java.lang.Object
it.unimi.dsi.fastutil.doubles.AbstractDouble2CharFunction
- All Implemented Interfaces:
- Double2CharFunction, Function<Double,Character>, Serializable
- Direct Known Subclasses:
- AbstractDouble2CharMap, Double2CharFunctions.EmptyFunction, Double2CharFunctions.Singleton, Double2CharFunctions.SynchronizedFunction, Double2CharFunctions.UnmodifiableFunction
public abstract class AbstractDouble2CharFunction
- extends Object
- implements Double2CharFunction, Serializable
An abstract class providing basic methods for functions implementing a type-specific interface.
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.
- See Also:
- Serialized Form
Method Summary |
void |
clear()
Removes all associations from this function (optional operation). |
boolean |
containsKey(Object ok)
Returns true if this function contains a mapping for the specified key. |
char |
defaultReturnValue()
Gets the default return value. |
void |
defaultReturnValue(char rv)
Sets the default return value. |
Character |
get(Object ok)
Delegates to the corresponding type-specific method, taking care of returning null on a missing key. |
char |
put(double key,
char value)
Adds a pair to the map. |
Character |
put(Double ok,
Character ov)
Delegates to the corresponding type-specific method, taking care of returning null on a missing key. |
char |
remove(double key)
Removes the mapping with the given key. |
Character |
remove(Object ok)
Delegates to the corresponding type-specific method, taking care of returning null on a missing key. |
Methods inherited from interface it.unimi.dsi.fastutil.Function |
size |
defaultReturnValue
public void defaultReturnValue(char rv)
- Description copied from interface:
Double2CharFunction
- Sets the default return value.
This value must be returned by type-specific versions of
get()
, put()
and remove()
to
denote that the map does not contain the specified key. It must be
0/false
/null
by default.
- Specified by:
defaultReturnValue
in interface Double2CharFunction
- Parameters:
rv
- the new default return value.- See Also:
Double2CharFunction.defaultReturnValue()
defaultReturnValue
public char defaultReturnValue()
- Description copied from interface:
Double2CharFunction
- Gets the default return value.
- Specified by:
defaultReturnValue
in interface Double2CharFunction
- Returns:
- the current default return value.
put
public char put(double key,
char value)
- Description copied from interface:
Double2CharFunction
- Adds a pair to the map.
- Specified by:
put
in interface Double2CharFunction
- Parameters:
key
- the key.value
- the value.
- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.put(Object,Object)
remove
public char remove(double key)
- Description copied from interface:
Double2CharFunction
- Removes the mapping with the given key.
- Specified by:
remove
in interface Double2CharFunction
- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.remove(Object)
clear
public void clear()
- Description copied from interface:
Function
- Removes all associations from this function (optional operation).
- Specified by:
clear
in interface Function<Double,Character>
- See Also:
Map.clear()
containsKey
public boolean containsKey(Object ok)
- Description copied from interface:
Function
- Returns true if this function contains a mapping for the specified key.
Note that for some kind of functions (e.g., hashes) this method
will always return true.
- Specified by:
containsKey
in interface Function<Double,Character>
- Parameters:
ok
- the key.
- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
get
public Character get(Object ok)
- Delegates to the corresponding type-specific method, taking care of returning
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.
- Specified by:
get
in interface Function<Double,Character>
- Parameters:
ok
- the key.
- Returns:
- the corresponding value, or
null
if no value was present for the given key. - See Also:
Map.get(Object)
put
public Character put(Double ok,
Character ov)
- Delegates to the corresponding type-specific method, taking care of returning
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.
- Specified by:
put
in interface Function<Double,Character>
- Parameters:
ok
- the key.ov
- the value.
- Returns:
- the old value, or
null
if no value was present for the given key. - See Also:
Map.put(Object,Object)
remove
public Character remove(Object ok)
- Delegates to the corresponding type-specific method, taking care of returning
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.
- Specified by:
remove
in interface Function<Double,Character>
- Returns:
- the old value, or
null
if no value was present for the given key. - See Also:
Map.remove(Object)