Re: Java decompilation on-the-fly, when opening .class file

[Kevin Rodgers]

Joao wrote:

> Has anyone set up a hook in emacs to call 'jad' or some other 
> Java decompiler when you visit a .class file ? I guess this should
> be feasible, but my emacs-lisp skills are not up to this yet.
>
> I would appreciate it if someone could share the code to do this.
> I'm running emacs on Windows 2000 (not sure it matters).

I'd be surprised if the JDEE doesn't already provide a feature like that:

http://jdee.sunsite.dk/


But if it doesn't, how about something as simple as this:

(defvar class-file-decompile-command "jad -classpath ${CLASSPATH:-.}"
  "The shell command run by `decompile-class-file'.")

(defun decompile-class-file (&optional file)
  "Run `class-file-decompile-command' on FILE, but only if it's a .class file.
If FILE is nil, run it on `buffer-file-name'."
  (interactive "fFile: ")
  (or file (setq file buffer-file-name))
  (and (equal (file-name-extension file) "class")
       (shell-command (concat class-file-decompile-command " " file))))

(add-hook 'find-file-hooks 'decompile-class-file)

--
Kevin Rodgers