Package it.unimi.dsi.fastutil.ints

Class AbstractInt2IntFunction

java.lang.Object

it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction

All Implemented Interfaces:

Function<java.lang.Integer,java.lang.Integer>, Int2IntFunction, java.io.Serializable, java.util.function.Function<java.lang.Integer,java.lang.Integer>, java.util.function.IntUnaryOperator

Direct Known Subclasses:

AbstractInt2IntMap, Int2IntFunctions.EmptyFunction, Int2IntFunctions.Singleton, Int2IntFunctions.UnmodifiableFunction

public abstract class AbstractInt2IntFunction
extends java.lang.Object
implements Int2IntFunction, 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	Description
int	defaultReturnValue()	Gets the default return value.
void	defaultReturnValue(int rv)	Sets the default return value (optional operation).

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

apply, clear, size

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2IntFunction

applyAsInt, containsKey, containsKey, get, get, put, put, remove, remove

Methods inherited from interface java.util.function.IntUnaryOperator

andThen, compose

Methods inherited from class java.lang.Object

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

Method Detail

defaultReturnValue

public void defaultReturnValue(int rv)

Description copied from interface: Int2IntFunction

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 Int2IntFunction

Parameters:

rv - the new default return value.

See Also:

Int2IntFunction.defaultReturnValue()

defaultReturnValue

public int defaultReturnValue()

Description copied from interface: Int2IntFunction

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 Int2IntFunction

Returns:

the current default return value.