it.unimi.dsi.fastutil.doubles

Class AbstractDouble2LongFunction

java.lang.Object

it.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction

All Implemented Interfaces:

Double2LongFunction, java.io.Serializable, java.util.function.DoubleToLongFunction, java.util.function.Function<java.lang.Double,java.lang.Long>

Direct Known Subclasses:

AbstractDouble2LongMap, Double2LongFunctions.EmptyFunction, Double2LongFunctions.Singleton, Double2LongFunctions.UnmodifiableFunction

public abstract class AbstractDouble2LongFunction
extends java.lang.Object
implements Double2LongFunction, java.io.Serializable

An abstract class providing basic methods for functions implementing a type-specific interface.

This class handles directly a default return value (including methods to access it). Instances of classes inheriting from this class have just to return defRetValue to denote lack of a key in type-specific methods. The value is serialized.

Implementing subclasses have just to provide type-specific get(), type-specific containsKey(), and size() methods.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
long	defaultReturnValue() Gets the default return value.
void	defaultReturnValue(long rv) Sets the default return value (optional operation).

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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

applyAsLong, containsKey, containsKey, get, get, put, put, remove, remove

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

apply, clear, size

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Method Detail

defaultReturnValue

public void defaultReturnValue(long rv)

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

Parameters:

rv - the new default return value.

See Also:

Double2LongFunction.defaultReturnValue()

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

Returns:

the current default return value.