net.sf.jga.fn.property
Class ConstructUnary<T,R>

java.lang.Object
  net.sf.jga.fn.Functor<R>
      net.sf.jga.fn.UnaryFunctor<T,R>
          net.sf.jga.fn.property.ConstructUnary<T,R>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class ConstructUnary<T,R>
extends UnaryFunctor<T,R>

Unary Functor that constructs an object of the given class via a one-argument constructor.

Copyright © 2003-2005 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

ConstructUnary.Visitor Interface for classes that may interpret a ConstructUnary predicate.

Constructor Summary

ConstructUnary(java.lang.Class<T> argclass, java.lang.Class<R> ctorclass)
Builds a functor that will build an object of class ctorclass, given an argument of class argclass.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(ConstructUnary) method, if it implements the nested Visitor interface.
R	fn(T arg) Builds an object via a one-arg constructor, passing the given value.
java.lang.reflect.Constructor<R>	getConstructor() Lazily loads the constructor
java.lang.String	toString()

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

bind, bind0th, bindNth, compose, compose, compose, composeNth, composeNth, eval, generate, generateNth

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstructUnary

public ConstructUnary(java.lang.Class<T> argclass,
                      java.lang.Class<R> ctorclass)

Builds a functor that will build an object of class ctorclass, given an argument of class argclass. The classes passed to the constructor must be assignable to the generic arguments (when generics are in use): ConstructUnary ctor = new ConstructUnary(String.class,Integer.class);

Throws:

java.lang.IllegalArgumentException - if either argument is omitted, or if the constructor cannot be found.

Method Detail

getConstructor

public java.lang.reflect.Constructor<R> getConstructor()
                                                throws java.lang.NoSuchMethodException

Lazily loads the constructor

Throws:

java.lang.NoSuchMethodException

fn

public R fn(T arg)

Builds an object via a one-arg constructor, passing the given value.

Specified by:

fn in class UnaryFunctor<T,R>

Returns:

the object built by the constructor

accept

public void accept(Visitor v)

Calls the Visitor's visit(ConstructUnary) 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