net.sf.jga.fn.adaptor
Class ComposeUnaryNth<R>

java.lang.Object
  net.sf.jga.fn.Functor<R>
      net.sf.jga.fn.adaptor.ComposeUnaryNth<R>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class ComposeUnaryNth<R>
extends Functor<R>

Functor that uses a Generator to produce the Nth argument to a given Functor. The generated result is inserted into the argument list given to this functor with the modified list being passed to the nested functor.

Copyright © 2009 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

ComposeUnaryNth.Visitor Interface for classes that may interpret a Generate2nd functor.

Constructor Summary

ComposeUnaryNth(Functor<R> fn, int idx, UnaryFunctor<?,?> uf)

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(Generate2nd) method, if it implements the nested Visitor interface.
R	eval(java.lang.Object... args) Returns the results of the functor, using the nested functor to modify the Nth argument.
Functor<R>	getFunctor() Returns the Functor that is invoked
UnaryFunctor<?,?>	getUnaryFunctor() Returns the generator that produces the indicated argument.
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

ComposeUnaryNth

public ComposeUnaryNth(Functor<R> fn,
                       int idx,
                       UnaryFunctor<?,?> uf)

Method Detail

getFunctor

public Functor<R> getFunctor()

Returns the Functor that is invoked

getUnaryFunctor

public UnaryFunctor<?,?> getUnaryFunctor()

Returns the generator that produces the indicated argument.

eval

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

Returns the results of the functor, using the nested functor to modify the Nth argument. If there are fewer than N argumets, no modification will be attempted.

Specified by:

eval in class Functor<R>

Returns:

fn.eval(args[0], ..., args[N-1], uf(args[N]), args[N+1], ...)

accept

public void accept(Visitor v)

Calls the Visitor's visit(Generate2nd) 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