Package org.apache.commons.functor.adapter

Class FullyBoundFunction<T>

java.lang.Object

org.apache.commons.functor.adapter.FullyBoundFunction<T>

Type Parameters:

T - the returned value type.

All Implemented Interfaces:

java.io.Serializable, Function<T>, Functor, NullaryFunctor

public final class FullyBoundFunction<T>
extends java.lang.Object
implements Function<T>, java.io.Serializable

Adapts a BinaryFunction to the Function interface using constant arguments.

Note that although this class implements Serializable, a given instance will only be truly Serializable if the underlying objects are. Attempts to serialize an instance whose delegates are not Serializable will result in an exception.

Version:

$Revision$ $Date$

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private BinaryFunction<java.lang.Object,java.lang.Object,? extends T>	function	The BinaryFunction I'm wrapping.
private java.lang.Object	left	The left parameter to pass to function.
private java.lang.Object	right	The right parameter to pass to function.
private static long	serialVersionUID	serialVersionUID declaration.

Constructor Summary

Constructors

Constructor	Description
FullyBoundFunction(BinaryFunction<? super L,? super R,? extends T> function, L left, R right)	Create a new FullyBoundFunction.

Method Summary

Modifier and Type	Method	Description
static <L,R,T> FullyBoundFunction<T>	bind(BinaryFunction<? super L,? super R,? extends T> function, L left, R right)	Adapt a BinaryFunction as a Function.
boolean	equals(java.lang.Object that)	Indicates whether some other object is "equal to" this functor.
boolean	equals(FullyBoundFunction<?> that)	Learn whether another FullyBoundFunction is equal to this.
T	evaluate()	Evaluate this function.
int	hashCode()	Returns a hash code for this functor adhering to the general Object.hashCode contract.
java.lang.String	toString()	Returns a human readable description of this functor.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

serialVersionUID declaration.

See Also:

Constant Field Values

function

private final BinaryFunction<java.lang.Object,java.lang.Object,? extends T> function

The BinaryFunction I'm wrapping.

left

private final java.lang.Object left

The left parameter to pass to function.

right

private final java.lang.Object right

The right parameter to pass to function.

Constructor Detail

FullyBoundFunction

public FullyBoundFunction(BinaryFunction<? super L,? super R,? extends T> function,
                          L left,
                          R right)

Create a new FullyBoundFunction.

Type Parameters:

L - the left argument type.

R - the right argument type.

Parameters:

function - the function to adapt

left - the left side argument to use

right - the right side argument to use

Method Detail

evaluate

public T evaluate()

Evaluate this function.

Specified by:

evaluate in interface Function<T>

Returns:

the T result of this evaluation

equals

public boolean equals(java.lang.Object that)

Indicates whether some other object is "equal to" this functor. This method must adhere to general Object.equals contract. Additionally, this method can return true only if the specified Object implements the same functor interface and is known to produce the same results and/or side-effects for the same arguments (if any).

While implementators are strongly encouraged to override the default Object implementation of this method, note that the default Object implementation does in fact adhere to the functor equals contract.

Specified by:

equals in interface Functor

Overrides:

equals in class java.lang.Object

Parameters:

that - the object to compare this functor to

Returns:

true iff the given object implements this functor interface, and is known to produce the same results and/or side-effects for the same arguments (if any).

See Also:

Functor.hashCode()

equals

public boolean equals(FullyBoundFunction<?> that)

Learn whether another FullyBoundFunction is equal to this.

Parameters:

that - FullyBoundFunction to test

Returns:

boolean

hashCode

public int hashCode()

Returns a hash code for this functor adhering to the general Object.hashCode contract. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.

Specified by:

hashCode in interface Functor

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code for this functor

See Also:

Functor.equals(java.lang.Object)

toString

public java.lang.String toString()

Returns a human readable description of this functor. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.

Specified by:

toString in interface Functor

Overrides:

toString in class java.lang.Object

Returns:

a human readable description of this functor

bind

public static <L,R,T> FullyBoundFunction<T> bind(BinaryFunction<? super L,? super R,? extends T> function,
                                                             L left,
                                                             R right)

Adapt a BinaryFunction as a Function.

Type Parameters:

L - left type

R - right type

T - result type

Parameters:

function - to adapt

left - left side argument

right - right side argument

Returns:

FullyBoundFunction