net.sf.jga.fn.adaptor
Class ChainFunctor<F,R>

java.lang.Object
  net.sf.jga.fn.Functor<R>
      net.sf.jga.fn.adaptor.ChainFunctor<F,R>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class ChainFunctor<F,R>
extends Functor<R>

Functor that passes the results of a nested Functor as the argument to a UnaryFunctor.

Copyright © 2009 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

ChainFunctor.Visitor Interface for classes that may interpret a ChainBinary functor.

Constructor Summary

ChainFunctor(UnaryFunctor<F,R> f, Functor<F> g)
Builds a ChainBinary functor, given outer functor f and inner functor g.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(ChainBinary) method, if it implements the nested Visitor interface.
R	eval(java.lang.Object... args) Passes arguments x and y to the inner functor, and passes the result to the outer functor.
Functor<F>	getInnerFunctor() Returns the inner functor
UnaryFunctor<F,R>	getOuterFunctor() Returns the outer functor
java.lang.String	toString()

Methods inherited from class net.sf.jga.fn.Functor

bind0th, bindNth, composeNth, composeNth, generateNth

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ChainFunctor

public ChainFunctor(UnaryFunctor<F,R> f,
                    Functor<F> g)

Builds a ChainBinary functor, given outer functor f and inner functor g.

Throws:

java.lang.IllegalArgumentException - if any of the functors is missing

Method Detail

getOuterFunctor

public UnaryFunctor<F,R> getOuterFunctor()

Returns the outer functor

Returns:

the outer functor

getInnerFunctor

public Functor<F> getInnerFunctor()

Returns the inner functor

Returns:

the inner functor

eval

public R eval(java.lang.Object... args)

Passes arguments x and y to the inner functor, and passes the result to the outer functor.

Specified by:

eval in class Functor<R>

Returns:

f(g(args))

accept

public void accept(Visitor v)

Calls the Visitor's visit(ChainBinary) method, if it implements the nested Visitor interface.

Specified by:

accept in interface Visitable

Overrides:

accept in class Functor<R>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object