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

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

All Implemented Interfaces:

java.io.Serializable, Visitable

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

Unary Functor that returns the value of the named property for the argument. The property name and type are set at construction.

Copyright © 2002-2005 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

GetProperty.Visitor Interface for classes that may interpret a GetProperty function.

Constructor Summary

GetProperty(java.lang.Class<T> argclass, java.lang.String propName)
Builds a GetProperty for the given property, using the given class to find the desired method.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(GetProperty) method, if it implements the nested Visitor interface.
R	fn(T arg) Returns the value of the designated property of the argument
java.lang.String	getPropertyName() Returns the name of the property that this functor retrieves.
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

GetProperty

public GetProperty(java.lang.Class<T> argclass,
                   java.lang.String propName)

Builds a GetProperty for the given property, using the given class to find the desired method.

Throws:

java.lang.IllegalArgumentException - if the property name is null or empty, or if there is no getter method for the given property name.

Method Detail

getPropertyName

public java.lang.String getPropertyName()

Returns the name of the property that this functor retrieves.

fn

public R fn(T arg)

Returns the value of the designated property of the argument

Specified by:

fn in class UnaryFunctor<T,R>

Returns:

the value of the designated property of the argument

Throws:

EvaluationException - if the argument does not have the designated public property, or if it is not of the correct type.

accept

public void accept(Visitor v)

Calls the Visitor's visit(GetProperty) 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