Re: API design

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 24 Jun 2009 19:50:51 -0400
Message-ID:
<4a42bbd4$0$48236$14726298@news.sunsite.dk>
Stefan Ram wrote:

  I assume that one wants to design an API with the option to
  open a FileOutputStream for /append mode/. There are several
  possibilities, and one can compare their readability,
  extendability (fitness for later API extensions), usability
  and other software quality factors. (feel free to comment):

==

  new FileOutputStream( "path", "a" );

==

  new FileOutputStream( "path", "append" );

==

  new FileOutputStream( "path", true );

==

  new FileOutputStream( "path", FileOutputStream.APPEND_MODE );

==

  new FileOutputStream( "path", FileAccessMode.APPEND_MODE );

==

  new FileOutputStream( path, new AppendMode() );

  /* here, ?AppendMode? might be a subtype of another type ?FileAccessMode? */

==

  new FileOutputStream( path, new FileAccessMode( "append" ));

==

  new AppendFileOutputStream( path );

  /* here, ?AppendFileOutputStream? might be a subtype of ?FileOutputStream? */

==

  Possibly, I have missed others possibilities to design this.


I would prefer:

new FileOutputStream( "path", FileAccessMode.APPEND_MODE )

Nice standard way of doing things.

Type safe (assuming it is an enum).

Arne

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