jaggregate
Class UnaryFunction<A,R>

java.lang.Object
  jaggregate.UnaryFunction<A,R>

Type Parameters:

A - a constraint on the allowable types for the functor's argument

R - a constraint on the allowable types for the functor's return value

All Implemented Interfaces:

UnaryFunctor<A,R>

public abstract class UnaryFunction<A,R>
extends Object
implements UnaryFunctor<A,R>

A functor that accepts one argument.

Version:

$Id: UnaryFunction.java,v 1.6 2008/10/03 19:01:23 pholser Exp $

Author:

Paul Holser

Method Summary

<T> UnaryFunction<T,R>

compose(UnaryFunction<? super T,A> other) Answers a unary functor that evaluates in the same manner as this functor would if handed the result of evaluating a given unary functor with a given argument as its own argument; effectively offering a composition of the two functors.

Methods inherited from class java.lang.Object

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

Methods inherited from interface jaggregate.UnaryFunctor

evaluate

Method Detail

compose

public final <T> UnaryFunction<T,R> compose(UnaryFunction<? super T,A> other)

Answers a unary functor that evaluates in the same manner as this functor would if handed the result of evaluating a given unary functor with a given argument as its own argument; effectively offering a composition of the two functors.

Type Parameters:

T - a constraint on the allowable types of the argument to the composed functor

Parameters:

other - the functor to compose

Returns:

a composed unary functor

Throws:

NullPointerException - if other is null