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+;;; ob-java.el --- Babel Functions for Java          -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+
+;; Author: Eric Schulte
+;; 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 <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Currently this only supports the external compilation and execution
+;; of java code blocks (i.e., no session support).
+
+;;; Code:
+(require 'ob)
+
+(defvar org-babel-tangle-lang-exts)
+(add-to-list 'org-babel-tangle-lang-exts '("java" . "java"))
+
+(defcustom org-babel-java-command "java"
+  "Name of the java command.
+May be either a command in the path, like java
+or an absolute path name, like /usr/local/bin/java
+parameters may be used, like java -verbose"
+  :group 'org-babel
+  :version "24.3"
+  :type 'string)
+
+(defcustom org-babel-java-compiler "javac"
+  "Name of the java compiler.
+May be either a command in the path, like javac
+or an absolute path name, like /usr/local/bin/javac
+parameters may be used, like javac -verbose"
+  :group 'org-babel
+  :version "24.3"
+  :type 'string)
+
+(defun org-babel-execute:java (body params)
+  (let* ((classname (or (cdr (assq :classname params))
+			(error
+			 "Can't compile a java block without a classname")))
+	 (packagename (file-name-directory classname))
+	 (src-file (concat classname ".java"))
+	 (cmpflag (or (cdr (assq :cmpflag params)) ""))
+	 (cmdline (or (cdr (assq :cmdline params)) ""))
+	 (full-body (org-babel-expand-body:generic body params)))
+    (with-temp-file src-file (insert full-body))
+    (org-babel-eval
+     (concat org-babel-java-compiler " " cmpflag " " src-file) "")
+    ;; created package-name directories if missing
+    (unless (or (not packagename) (file-exists-p packagename))
+      (make-directory packagename 'parents))
+    (let ((results (org-babel-eval (concat org-babel-java-command
+                                           " " cmdline " " classname) "")))
+      (org-babel-reassemble-table
+       (org-babel-result-cond (cdr (assq :result-params params))
+	 (org-babel-read results)
+         (let ((tmp-file (org-babel-temp-file "c-")))
+           (with-temp-file tmp-file (insert results))
+           (org-babel-import-elisp-from-file tmp-file)))
+       (org-babel-pick-name
+        (cdr (assq :colname-names params)) (cdr (assq :colnames params)))
+       (org-babel-pick-name
+        (cdr (assq :rowname-names params)) (cdr (assq :rownames params)))))))
+
+(provide 'ob-java)
+
+
+
+;;; ob-java.el ends here