public static class Reference2ReferenceFunctions.EmptyFunction<K,V> extends AbstractReference2ReferenceFunction<K,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() |
java.lang.Object |
clone() |
boolean |
containsKey(java.lang.Object k) |
V |
defaultReturnValue()
Gets the default return value.
|
void |
defaultReturnValue(V defRetValue)
Sets the default return value (optional operation).
|
boolean |
equals(java.lang.Object o) |
V |
get(java.lang.Object k)
Returns the value to which the given key is mapped.
|
V |
getOrDefault(java.lang.Object k,
V defaultValue)
Returns the value associated by this function to the specified key, or give the specified
value if not present.
|
int |
hashCode() |
int |
size() |
java.lang.String |
toString() |
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, put, remove
public V get(java.lang.Object k)
Reference2ReferenceFunction
get
in interface Reference2ReferenceFunction<K,V>
k
- the key.Function.get(Object)
public V getOrDefault(java.lang.Object k, V defaultValue)
Reference2ReferenceFunction
getOrDefault
in interface Reference2ReferenceFunction<K,V>
k
- the key.defaultValue
- the value to return if not present.defaultValue
if no value was present for the given key.Function.getOrDefault(Object, Object)
public boolean containsKey(java.lang.Object k)
public V defaultReturnValue()
Reference2ReferenceFunction
This default implementation just return the default null value
of the type (null
for objects, 0 for scalars, false for Booleans).
defaultReturnValue
in interface Reference2ReferenceFunction<K,V>
defaultReturnValue
in class AbstractReference2ReferenceFunction<K,V>
public void defaultReturnValue(V defRetValue)
Reference2ReferenceFunction
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 Reference2ReferenceFunction<K,V>
defaultReturnValue
in class AbstractReference2ReferenceFunction<K,V>
defRetValue
- the new default return value.Reference2ReferenceFunction.defaultReturnValue()
public int size()
public void clear()
public java.lang.Object clone()
clone
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object
public boolean equals(java.lang.Object o)
equals
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object