public static class Long2ReferenceFunctions.EmptyFunction<V> extends AbstractLong2ReferenceFunction<V> implements java.io.Serializable, java.lang.Cloneable
This class may be useful to implement your own in case you subclass a type-specific function.
Modifier and Type | Method and Description |
---|---|
void |
clear()
Removes all associations from this function (optional operation).
|
java.lang.Object |
clone() |
boolean |
containsKey(long k) |
V |
defaultReturnValue()
Gets the default return value.
|
void |
defaultReturnValue(V defRetValue)
Sets the default return value.
|
V |
get(long k)
Returns the value to which the given key is mapped.
|
V |
get(java.lang.Object k)
Delegates to the corresponding type-specific method, taking care of returning
null on a missing key. |
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists.
|
containsKey, put, put, remove, remove
public V get(long k)
Long2ReferenceFunction
get
in interface Long2ReferenceFunction<V>
k
- the key.Function.get(Object)
public boolean containsKey(long k)
containsKey
in interface Long2ReferenceFunction<V>
Function.containsKey(Object)
public V defaultReturnValue()
Long2ReferenceFunction
defaultReturnValue
in interface Long2ReferenceFunction<V>
defaultReturnValue
in class AbstractLong2ReferenceFunction<V>
public void defaultReturnValue(V defRetValue)
Long2ReferenceFunction
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 Long2ReferenceFunction<V>
defaultReturnValue
in class AbstractLong2ReferenceFunction<V>
defRetValue
- the new default return value.Long2ReferenceFunction.defaultReturnValue()
public V get(java.lang.Object k)
AbstractLong2ReferenceFunction
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.
public int size()
Function
Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible.
public void clear()
Function
public java.lang.Object clone()
clone
in class java.lang.Object