public static class Object2BooleanFunctions.Singleton<K> extends AbstractObject2BooleanFunction<K> implements Serializable, Cloneable
This class may be useful to implement your own in case you subclass a type-specific function.
Modifier and Type | Method and Description |
---|---|
Object |
clone() |
boolean |
containsKey(Object k)
Returns true if this function contains a mapping for the specified key.
|
boolean |
getBoolean(Object k)
Returns the value to which the given key is mapped.
|
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists.
|
clear, defaultReturnValue, defaultReturnValue, get, put, put, remove, removeBoolean
public boolean containsKey(Object k)
Function
Note that for some kind of functions (e.g., hashes) this method will always return true.
containsKey
in interface Function<K,Boolean>
k
- the key.key
.Map.containsKey(Object)
public boolean getBoolean(Object k)
Object2BooleanFunction
getBoolean
in interface Object2BooleanFunction<K>
k
- the key.Function.get(Object)
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.