Functional programming in Java

From: "andrew cooke" <andrew@...>

Date: Wed, 1 Mar 2006 12:49:18 -0300 (CLST)

I needed a filter for a list.  Rather than reinvent the wheel I downloaded
FunctionalJ - http://functionalj.sourceforge.net/

It's not amazingly elegant (you need to name methods as strings, for
example), but it does the job.  Here's the final code:

  @SuppressWarnings("unchecked")
  public static List<? extends LifetimeAccessControl>
  filterValid(List<? extends LifetimeAccessControl> list) {
    return Functions.filterNot(
      new InstanceFunction(LifetimeAccessControl.class, "isExpired"), list);
  }

Andrew

Oooops.  Mentioned here - http://www.acooke.org/cute/Functional1.html

[The latest version also supports generics; it also has some new
reflection functionality that might address the "strings" issue I
mentioned above; Frederic's support for this package is very good -
Andrew]

---------------------------- Original Message ----------------------------
Subject: Re: Lists only
From:    "Frederic Daoud"
Date:    Tue, August 29, 2006 10:44 pm
--------------------------------------------------------------------------

Hi Andrew,

Came across this on your blog:

> I forgot to mention that for some crazy reason the library only works on
> lists.  Given Java has the generic iterators that are supported by every
> collection you'd think that all collection types would be supported.  Very
> odd indeed.

Indeed, very odd that I did that. I corrected this in version 0.8 - now
the library uses collections. If I overlooked it somewhere please let me
know.

Also other comments or suggestions are always welcome..

http://functionalj.sourceforge.net

Cheers,
Frederic