com.google.common.base

Class Functions.ConstantFunction<E>

java.lang.Object

com.google.common.base.Functions.ConstantFunction<E>

All Implemented Interfaces:

Function<java.lang.Object,E>, java.io.Serializable

Enclosing class:

Functions

private static class Functions.ConstantFunction<E>
extends java.lang.Object
implements Function<java.lang.Object,E>, java.io.Serializable

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID
private E	value

Constructor Summary

Constructors

Constructor and Description
ConstantFunction(E value)

Method Summary

Modifier and Type	Method and Description
E	apply(java.lang.Object from) Returns the result of applying this function to input.
boolean	equals(java.lang.Object obj) Indicates whether another object is equal to this function.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

value

private final E value

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

ConstantFunction

public ConstantFunction(@Nullable
                        E value)

Method Detail

apply

public E apply(@Nullable
               java.lang.Object from)

Description copied from interface: Function

Returns the result of applying this function to input. This method is generally expected, but not absolutely required, to have the following properties:

• Its execution does not cause any observable side effects.
• The computation is consistent with equals; that is, Objects.equal(a, b) implies that Objects.equal(function.apply(a), function.apply(b)).

Specified by:

apply in interface Function<java.lang.Object,E>

equals

public boolean equals(@Nullable
                      java.lang.Object obj)

Description copied from interface: Function

Indicates whether another object is equal to this function.

Most implementations will have no reason to override the behavior of Object.equals(java.lang.Object). However, an implementation may also choose to return true whenever object is a Function that it considers interchangeable with this one. "Interchangeable" typically means that Objects.equal(this.apply(f), that.apply(f)) is true for all f of type F. Note that a false result from this method does not imply that the functions are known not to be interchangeable.

Specified by:

equals in interface Function<java.lang.Object,E>

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object