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org-mode/lisp/ob-scala.el

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;;; ob-scala.el --- org-babel functions for Scala evaluation
2013-01-08 14:26:04 +00:00
;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
;; Author: Andrzej Lichnerowicz
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Currently only supports the external execution. No session support yet.
;;; Requirements:
;; - Scala language :: http://www.scala-lang.org/
;; - Scala major mode :: Can be installed from Scala sources
;; https://github.com/scala/scala-dist/blob/master/tool-support/src/emacs/scala-mode.el
;;; Code:
(require 'ob)
(eval-when-compile (require 'cl))
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(defvar org-babel-tangle-lang-exts) ;; Autoloaded
(add-to-list 'org-babel-tangle-lang-exts '("scala" . "scala"))
(defvar org-babel-default-header-args:scala '())
(defvar org-babel-scala-command "scala"
"Name of the command to use for executing Scala code.")
(defun org-babel-execute:scala (body params)
"Execute a block of Scala code with org-babel. This function is
called by `org-babel-execute-src-block'"
(message "executing Scala source code block")
(let* ((processed-params (org-babel-process-params params))
(session (org-babel-scala-initiate-session (nth 0 processed-params)))
(vars (nth 1 processed-params))
(result-params (nth 2 processed-params))
(result-type (cdr (assoc :result-type params)))
(full-body (org-babel-expand-body:generic
body params))
(result (org-babel-scala-evaluate
session full-body result-type result-params)))
(org-babel-reassemble-table
result
(org-babel-pick-name
(cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
(org-babel-pick-name
(cdr (assoc :rowname-names params)) (cdr (assoc :rownames params))))))
(defun org-babel-scala-table-or-string (results)
"Convert RESULTS into an appropriate elisp value.
If RESULTS look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
(org-babel-script-escape results))
(defvar org-babel-scala-wrapper-method
"var str_result :String = null;
Console.withOut(new java.io.OutputStream() {def write(b: Int){
}}) {
str_result = {
%s
}.toString
}
print(str_result)
")
(defun org-babel-scala-evaluate
(session body &optional result-type result-params)
"Evaluate BODY in external Scala process.
If RESULT-TYPE equals 'output then return standard output as a string.
If RESULT-TYPE equals 'value then return the value of the last statement
in BODY as elisp."
(when session (error "Sessions are not (yet) supported for Scala"))
(case result-type
(output
(let ((src-file (org-babel-temp-file "scala-")))
(progn (with-temp-file src-file (insert body))
(org-babel-eval
(concat org-babel-scala-command " " src-file) ""))))
(value
(let* ((src-file (org-babel-temp-file "scala-"))
(wrapper (format org-babel-scala-wrapper-method body)))
(with-temp-file src-file (insert wrapper))
((lambda (raw)
org-babel-result-cond - unified handling of results * lisp/ob.el (org-babel-result-cond): This function should now be used by all language backends to handle the processing of raw code block output into scalar results, table results, or ignored results depending on the value of result-params. * lisp/ob-C.el (org-babel-C-execute): Use org-babel-result-cond. * lisp/ob-R.el (org-babel-R-evaluate-external-process): Use org-babel-result-cond. (org-babel-R-evaluate-session): Use org-babel-result-cond. * lisp/ob-awk.el (org-babel-execute:awk): Use org-babel-result-cond. * lisp/ob-clojure.el (org-babel-execute:clojure): Use org-babel-result-cond. * lisp/ob-emacs-lisp.el (org-babel-execute:emacs-lisp): Use org-babel-result-cond. * lisp/ob-fortran.el (org-babel-execute:fortran): Use org-babel-result-cond. * lisp/ob-io.el (org-babel-io-evaluate): Use org-babel-result-cond. * lisp/ob-java.el (org-babel-execute:java): Use org-babel-result-cond. * lisp/ob-lisp.el (org-babel-execute:lisp): Use org-babel-result-cond. * lisp/ob-maxima.el (org-babel-execute:maxima): Use org-babel-result-cond. * lisp/ob-picolisp.el (org-babel-execute:picolisp): Use org-babel-result-cond. * lisp/ob-python.el (org-babel-python-evaluate-external-process): Use org-babel-result-cond. (org-babel-python-evaluate-session): Use org-babel-result-cond. * lisp/ob-scala.el (org-babel-scala-evaluate): Use org-babel-result-cond. * lisp/ob-sh.el (org-babel-sh-evaluate): Use org-babel-result-cond. * lisp/ob-shen.el (org-babel-execute:shen): Use org-babel-result-cond. * lisp/ob-sql.el (org-babel-execute:sql): Use org-babel-result-cond. * lisp/ob-sqlite.el (org-babel-execute:sqlite): Use org-babel-result-cond.
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(org-babel-result-cond result-params
raw
(org-babel-scala-table-or-string raw)))
(org-babel-eval
(concat org-babel-scala-command " " src-file) ""))))))
(defun org-babel-prep-session:scala (session params)
"Prepare SESSION according to the header arguments specified in PARAMS."
(error "Sessions are not (yet) supported for Scala"))
(defun org-babel-scala-initiate-session (&optional session)
"If there is not a current inferior-process-buffer in SESSION
then create. Return the initialized session. Sessions are not
supported in Scala."
nil)
(provide 'ob-scala)
;;; ob-scala.el ends here