it.unimi.dsi.fastutil.floats
Class Float2ReferenceFunctions.EmptyFunction<V>

java.lang.Object
  extended by it.unimi.dsi.fastutil.floats.AbstractFloat2ReferenceFunction<V>
      extended by it.unimi.dsi.fastutil.floats.Float2ReferenceFunctions.EmptyFunction<V>
All Implemented Interfaces:
Float2ReferenceFunction<V>, Function<Float,V>, Serializable, Cloneable
Direct Known Subclasses:
Float2ReferenceMaps.EmptyMap
Enclosing class:
Float2ReferenceFunctions

public static class Float2ReferenceFunctions.EmptyFunction<V>
extends AbstractFloat2ReferenceFunction<V>
implements Serializable, Cloneable

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.

See Also:
Serialized Form

Field Summary
static long serialVersionUID
           
 
Fields inherited from class it.unimi.dsi.fastutil.floats.AbstractFloat2ReferenceFunction
defRetValue
 
Constructor Summary
protected Float2ReferenceFunctions.EmptyFunction()
           
 
Method Summary
 void clear()
          Removes all associations from this function (optional operation).
 Object clone()
           
 boolean containsKey(float k)
           
 V defaultReturnValue()
          Gets the default return value.
 void defaultReturnValue(V defRetValue)
          Sets the default return value.
 V get(float 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.floats.AbstractFloat2ReferenceFunction
containsKey, put, put, remove, remove
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

serialVersionUID

public static final long serialVersionUID
See Also:
Constant Field Values
Constructor Detail

Float2ReferenceFunctions.EmptyFunction

protected Float2ReferenceFunctions.EmptyFunction()
Method Detail

get

public V get(float k)
Description copied from interface: Float2ReferenceFunction
Returns the value to which the given key is mapped.

Specified by:
get in interface Float2ReferenceFunction<V>
Parameters:
k - the key.
Returns:
the corresponding value, or the default return value if no value was present for the given key.
See Also:
Function.get(Object)

containsKey

public boolean containsKey(float k)
Specified by:
containsKey in interface Float2ReferenceFunction<V>
See Also:
Function.containsKey(Object)

defaultReturnValue

public V defaultReturnValue()
Description copied from interface: Float2ReferenceFunction
Gets the default return value.

Specified by:
defaultReturnValue in interface Float2ReferenceFunction<V>
Overrides:
defaultReturnValue in class AbstractFloat2ReferenceFunction<V>
Returns:
the current default return value.

defaultReturnValue

public void defaultReturnValue(V defRetValue)
Description copied from interface: Float2ReferenceFunction
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 Float2ReferenceFunction<V>
Overrides:
defaultReturnValue in class AbstractFloat2ReferenceFunction<V>
Parameters:
defRetValue - the new default return value.
See Also:
Float2ReferenceFunction.defaultReturnValue()

get

public V get(Object k)
Description copied from class: AbstractFloat2ReferenceFunction
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<Float,V>
Overrides:
get in class AbstractFloat2ReferenceFunction<V>
Parameters:
k - the key.
Returns:
the corresponding value, or null if no value was present for the given key.
See Also:
Map.get(Object)

size

public int size()
Description copied from interface: Function
Returns the intended number of keys in this function, or -1 if no such number exists.

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.

Specified by:
size in interface Function<Float,V>
Returns:
the intended number of keys in this function, or -1 if that number is not available.

clear

public void clear()
Description copied from interface: Function
Removes all associations from this function (optional operation).

Specified by:
clear in interface Function<Float,V>
Overrides:
clear in class AbstractFloat2ReferenceFunction<V>
See Also:
Map.clear()

clone

public Object clone()
Overrides:
clone in class Object


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