it.unimi.dsi.fastutil.ints

Class Int2DoubleFunctions.EmptyFunction

java.lang.Object

it.unimi.dsi.fastutil.ints.AbstractInt2DoubleFunction

it.unimi.dsi.fastutil.ints.Int2DoubleFunctions.EmptyFunction

All Implemented Interfaces:

Int2DoubleFunction, Serializable, Cloneable, Function<Integer,Double>, IntToDoubleFunction

Direct Known Subclasses:

Int2DoubleMaps.EmptyMap

Enclosing class:

Int2DoubleFunctions

public static class Int2DoubleFunctions.EmptyFunction
extends AbstractInt2DoubleFunction
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

Method Summary

Modifier and Type	Method and Description
void	clear()
Object	clone()
boolean	containsKey(int k) Returns true if this function contains a mapping for the specified key.
double	defaultReturnValue() Gets the default return value.
void	defaultReturnValue(double defRetValue) Sets the default return value (optional operation).
boolean	equals(Object o)
double	get(int k) Returns the value to which the given key is mapped.
int	hashCode()
int	size()
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2DoubleFunction

applyAsDouble, containsKey, get, put, put, remove, remove

Methods inherited from interface it.unimi.dsi.fastutil.Function

apply

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Method Detail

get

public double get(int k)

Description copied from interface: Int2DoubleFunction

Returns the value to which the given key is mapped.

Specified by:

get in interface Int2DoubleFunction

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(int k)

Description copied from interface: Int2DoubleFunction

Returns true if this function contains a mapping for the specified key.

Note that for some kind of functions (e.g., hashes) this method will always return true. In particular, this default implementation always returns true.

Specified by:

containsKey in interface Int2DoubleFunction

Parameters:

k - the key.

Returns:

true if this function associates a value to key.

See Also:

Function.containsKey(Object)

defaultReturnValue

public double defaultReturnValue()

Description copied from interface: Int2DoubleFunction

Gets the default return value.

This default implementation just return the default null value of the type (null for objects, 0 for scalars, false for Booleans).

Specified by:

defaultReturnValue in interface Int2DoubleFunction

Overrides:

defaultReturnValue in class AbstractInt2DoubleFunction

Returns:

the current default return value.

defaultReturnValue

public void defaultReturnValue(double defRetValue)

Description copied from interface: Int2DoubleFunction

Sets the default return value (optional operation). 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 Int2DoubleFunction

Overrides:

defaultReturnValue in class AbstractInt2DoubleFunction

Parameters:

defRetValue - the new default return value.

See Also:

Int2DoubleFunction.defaultReturnValue()

size

public int size()

clear

public void clear()

clone

public Object clone()

Overrides:

clone in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object