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java.lang.Objectit.unimi.dsi.fastutil.doubles.AbstractDouble2ObjectFunction<V>
it.unimi.dsi.fastutil.doubles.Double2ObjectFunctions.EmptyFunction<V>
public static class Double2ObjectFunctions.EmptyFunction<V>
An immutable class representing an empty type-specific function.
This class may be useful to implement your own in case you subclass a type-specific function.
Field Summary | |
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static long |
serialVersionUID
|
Method Summary | |
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void |
clear()
Removes all associations from this function (optional operation). |
Object |
clone()
|
boolean |
containsKey(double k)
|
V |
defaultReturnValue()
Gets the default return value. |
void |
defaultReturnValue(V defRetValue)
Sets the default return value. |
V |
get(double k)
Returns the value to which the given key is mapped. |
V |
get(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. |
Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2ObjectFunction |
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containsKey, put, put, remove, remove |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final long serialVersionUID
Method Detail |
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public V get(double k)
Double2ObjectFunction
get
in interface Double2ObjectFunction<V>
k
- the key.
Function.get(Object)
public boolean containsKey(double k)
containsKey
in interface Double2ObjectFunction<V>
Function.containsKey(Object)
public V defaultReturnValue()
Double2ObjectFunction
defaultReturnValue
in interface Double2ObjectFunction<V>
defaultReturnValue
in class AbstractDouble2ObjectFunction<V>
public void defaultReturnValue(V defRetValue)
Double2ObjectFunction
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 Double2ObjectFunction<V>
defaultReturnValue
in class AbstractDouble2ObjectFunction<V>
defRetValue
- the new default return value.Double2ObjectFunction.defaultReturnValue()
public V get(Object k)
AbstractDouble2ObjectFunction
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<Double,V>
get
in class AbstractDouble2ObjectFunction<V>
k
- the key.
null
if no value was present for the given key.Map.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.
size
in interface Function<Double,V>
public void clear()
Function
clear
in interface Function<Double,V>
clear
in class AbstractDouble2ObjectFunction<V>
Map.clear()
public Object clone()
clone
in class Object
|
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