it.unimi.dsi.fastutil.doubles

Class Double2LongFunctions.EmptyFunction

java.lang.Object

it.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction

it.unimi.dsi.fastutil.doubles.Double2LongFunctions.EmptyFunction

All Implemented Interfaces:

Double2LongFunction, Serializable, Cloneable, DoubleToLongFunction, Function<Double,Long>

Direct Known Subclasses:

Double2LongMaps.EmptyMap

Enclosing class:

Double2LongFunctions

public static class Double2LongFunctions.EmptyFunction
extends AbstractDouble2LongFunction
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

Fields inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction

defRetValue

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EmptyFunction()

Method Summary

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

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2LongFunction

applyAsLong, 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

Constructor Detail

EmptyFunction

protected EmptyFunction()

Method Detail

get

public long get(double k)

Description copied from interface: Double2LongFunction

Returns the value to which the given key is mapped.

Specified by:

get in interface Double2LongFunction

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(double k)

Description copied from interface: Double2LongFunction

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 Double2LongFunction

Parameters:

k - the key.

Returns:

true if this function associates a value to key.

See Also:

Function.containsKey(Object)

defaultReturnValue

public long defaultReturnValue()

Description copied from interface: Double2LongFunction

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 Double2LongFunction

Overrides:

defaultReturnValue in class AbstractDouble2LongFunction

Returns:

the current default return value.

defaultReturnValue

public void defaultReturnValue(long defRetValue)

Description copied from interface: Double2LongFunction

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 Double2LongFunction

Overrides:

defaultReturnValue in class AbstractDouble2LongFunction

Parameters:

defRetValue - the new default return value.

See Also:

Double2LongFunction.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