mirror of
https://git.savannah.gnu.org/git/emacs/org-mode.git
synced 2024-08-19 08:49:09 +00:00
* lisp/ob-java.el: Don't require class definitions to be declared public. * testing/lisp/test-ob-java.el: Add test with non-public class.
426 lines
18 KiB
EmacsLisp
426 lines
18 KiB
EmacsLisp
;;; ob-java.el --- org-babel functions for java evaluation -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2011-2020 Free Software Foundation, Inc.
|
|
|
|
;; Author: Ian Martins <ianxm@jhu.edu>
|
|
;; Keywords: literate programming, reproducible research
|
|
;; Homepage: https://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:
|
|
|
|
;; Org-Babel support for evaluating java source code.
|
|
|
|
;;; Code:
|
|
(require 'ob)
|
|
|
|
(defvar org-babel-tangle-lang-exts)
|
|
(add-to-list 'org-babel-tangle-lang-exts '("java" . "java"))
|
|
|
|
(defvar org-babel-default-header-args:java '()
|
|
"Default header args for java source blocks.")
|
|
|
|
(defconst org-babel-header-args:java '((imports . :any))
|
|
"Java-specific header arguments.")
|
|
|
|
(defvar org-babel-java-compiler-command "javac"
|
|
"Name of the command to execute the java compiler.")
|
|
|
|
(defvar org-babel-java-runtime-command "java"
|
|
"Name of the command to run the java runtime.")
|
|
|
|
(defcustom org-babel-java-hline-to "null"
|
|
"Replace hlines in incoming tables with this when translating to java."
|
|
:group 'org-babel
|
|
:version "25.2"
|
|
:package-version '(Org . "9.3")
|
|
:type 'string)
|
|
|
|
(defcustom org-babel-java-null-to 'hline
|
|
"Replace `null' in java tables with this before returning."
|
|
:group 'org-babel
|
|
:version "25.2"
|
|
:package-version '(Org . "9.3")
|
|
:type 'symbol)
|
|
|
|
(defun org-babel-execute:java (body params)
|
|
"Execute a java source block with BODY code and PARAMS params."
|
|
(let* (;; if true, run from babel temp directory
|
|
(run-from-temp (not (assq :dir params)))
|
|
;; class and package
|
|
(fullclassname (or (cdr (assq :classname params))
|
|
(org-babel-java-find-classname body)))
|
|
;; just the class name
|
|
(classname (car (last (split-string fullclassname "\\."))))
|
|
;; just the package name
|
|
(packagename (if (seq-contains fullclassname ?.)
|
|
(file-name-base fullclassname)))
|
|
;; the base dir that contains the top level package dir
|
|
(basedir (file-name-as-directory (if run-from-temp
|
|
org-babel-temporary-directory
|
|
".")))
|
|
;; the dir to write the source file
|
|
(packagedir (if (and (not run-from-temp) packagename)
|
|
(file-name-as-directory
|
|
(concat basedir (replace-regexp-in-string "\\\." "/" packagename)))
|
|
basedir))
|
|
;; the filename of the source file
|
|
(src-file (concat packagedir classname ".java"))
|
|
;; compiler flags
|
|
(cmpflag (or (cdr (assq :cmpflag params)) ""))
|
|
;; runtime flags
|
|
(cmdline (or (cdr (assq :cmdline params)) ""))
|
|
;; command line args
|
|
(cmdargs (or (cdr (assq :cmdargs params)) ""))
|
|
;; the command to compile and run
|
|
(cmd (concat org-babel-java-compiler-command " " cmpflag " "
|
|
(org-babel-process-file-name src-file 'noquote)
|
|
" && " org-babel-java-runtime-command
|
|
" -cp " (org-babel-process-file-name basedir 'noquote)
|
|
" " cmdline " " (if run-from-temp classname fullclassname)
|
|
" " cmdargs))
|
|
;; header args for result processing
|
|
(result-type (cdr (assq :result-type params)))
|
|
(result-params (cdr (assq :result-params params)))
|
|
(result-file (and (eq result-type 'value)
|
|
(org-babel-temp-file "java-")))
|
|
;; the expanded body of the source block
|
|
(full-body (org-babel-expand-body:java body params)))
|
|
|
|
;; created package-name directories if missing
|
|
(unless (or (not packagedir) (file-exists-p packagedir))
|
|
(make-directory packagedir 'parents))
|
|
|
|
;; write the source file
|
|
(setq full-body (org-babel-java--expand-for-evaluation
|
|
full-body run-from-temp result-type result-file))
|
|
(with-temp-file src-file (insert full-body))
|
|
|
|
;; compile, run, process result
|
|
(org-babel-reassemble-table
|
|
(org-babel-java-evaluate cmd result-type result-params result-file)
|
|
(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))))))
|
|
|
|
;; helper functions
|
|
|
|
(defun org-babel-java-find-classname (body)
|
|
"Try to find fully qualified class name in BODY.
|
|
Look through BODY for the package and class. If found, put them
|
|
together into a fully qualified class name and return. Else just
|
|
return class name. If that isn't found either, default to Main."
|
|
(let ((package (if (string-match org-babel-java--package-re body)
|
|
(match-string 1 body)))
|
|
(class (if (string-match org-babel-java--class-re body)
|
|
(match-string 1 body))))
|
|
(or (and package class (concat package "." class))
|
|
(and class class)
|
|
(and package (concat package ".Main"))
|
|
"Main")))
|
|
|
|
(defconst org-babel-java--package-re "^[[:space:]]*package[[:space:]]+\\\([[:alnum:]_\.]+\\\);$"
|
|
"Regexp for the package statement.")
|
|
(defconst org-babel-java--imports-re "^[[:space:]]*import[[:space:]]+\\\([[:alnum:]_\.]+\\\);$"
|
|
"Regexp for import statements.")
|
|
(defconst org-babel-java--class-re "^[[:space:]]*\\\(?:public[[:space:]]+\\\)?class[[:space:]]+\\\([[:alnum:]_]+\\\)[[:space:]]*\n?[[:space:]]*{"
|
|
"Regexp for the class declaration.")
|
|
(defconst org-babel-java--main-re "public static void main(String\\\(?:\\[]\\\)?[[:space:]]+[^ ]+\\\(?:\\[]\\\)?).*\n?[[:space:]]*{"
|
|
"Regexp for the main method declaration.")
|
|
(defconst org-babel-java--any-method-re "public .*(.*).*\n?[[:space:]]*{"
|
|
"Regexp for any method.")
|
|
(defconst org-babel-java--result-wrapper "\n public static String __toString(Object val) {
|
|
if (val instanceof String) {
|
|
return \"\\\"\" + val + \"\\\"\";
|
|
} else if (val == null) {
|
|
return \"null\";
|
|
} else if (val.getClass().isArray()) {
|
|
StringBuffer sb = new StringBuffer();
|
|
Object[] vals = (Object[])val;
|
|
sb.append(\"[\");
|
|
for (int ii=0; ii<vals.length; ii++) {
|
|
sb.append(__toString(vals[ii]));
|
|
if (ii<vals.length-1)
|
|
sb.append(\",\");
|
|
}
|
|
sb.append(\"]\");
|
|
return sb.toString();
|
|
} else if (val instanceof List) {
|
|
StringBuffer sb = new StringBuffer();
|
|
List vals = (List)val;
|
|
sb.append(\"[\");
|
|
for (int ii=0; ii<vals.size(); ii++) {
|
|
sb.append(__toString(vals.get(ii)));
|
|
if (ii<vals.size()-1)
|
|
sb.append(\",\");
|
|
}
|
|
sb.append(\"]\");
|
|
return sb.toString();
|
|
} else {
|
|
return String.valueOf(val);
|
|
}
|
|
}
|
|
|
|
public static void main(String[] args) throws IOException {
|
|
BufferedWriter output = new BufferedWriter(new FileWriter(\"%s\"));
|
|
output.write(__toString(_main(args)));
|
|
output.close();
|
|
}"
|
|
"Code to inject into a class so that we can capture the value it returns.
|
|
This implementation was inspired by ob-python, although not as
|
|
elegant. This modified the source block to write out the value
|
|
it wants to return to a temporary file so that ob-java can read
|
|
it back. The name of the temporary file to write must be
|
|
replaced in this string.")
|
|
|
|
(defun org-babel-java--expand-for-evaluation (body suppress-package-p result-type result-file)
|
|
"Expand source block for evaluation.
|
|
In order to return a value we have to add a __toString method.
|
|
In order to prevent classes without main methods from erroring we
|
|
add a dummy main method if one is not provided. These
|
|
manipulations are done outside of `org-babel--expand-body' so
|
|
that they are hidden from tangles.
|
|
|
|
BODY is the file content before instrumentation.
|
|
|
|
SUPPRESS-PACKAGE-P if true, suppress the package statement.
|
|
|
|
RESULT-TYPE is taken from params.
|
|
|
|
RESULT-FILE is the temp file to write the result."
|
|
(with-temp-buffer
|
|
(insert body)
|
|
|
|
;; suppress package statement
|
|
(goto-char (point-min))
|
|
(when (and suppress-package-p
|
|
(re-search-forward org-babel-java--package-re nil t))
|
|
(replace-match ""))
|
|
|
|
;; add a dummy main method if needed
|
|
(goto-char (point-min))
|
|
(when (not (re-search-forward org-babel-java--main-re nil t))
|
|
(org-babel-java--move-past org-babel-java--class-re)
|
|
(insert "\n public static void main(String[] args) {
|
|
System.out.print(\"success\");
|
|
}\n\n"))
|
|
|
|
;; special handling to return value
|
|
(when (eq result-type 'value)
|
|
(goto-char (point-min))
|
|
(org-babel-java--move-past org-babel-java--class-re)
|
|
(insert (format org-babel-java--result-wrapper
|
|
(org-babel-process-file-name result-file 'noquote)))
|
|
(search-forward "public static void main(") ; rename existing main
|
|
(replace-match "public static Object _main("))
|
|
|
|
;; add imports
|
|
(org-babel-java--import-maybe "java.util" "List")
|
|
(org-babel-java--import-maybe "java.util" "Arrays")
|
|
(org-babel-java--import-maybe "java.io" "BufferedWriter")
|
|
(org-babel-java--import-maybe "java.io" "FileWriter")
|
|
(org-babel-java--import-maybe "java.io" "IOException")
|
|
|
|
(buffer-string)))
|
|
|
|
(defun org-babel-java--move-past (re)
|
|
"Move point past the first occurrence of the given regexp RE."
|
|
(while (re-search-forward re nil t)
|
|
(goto-char (1+ (match-end 0)))))
|
|
|
|
(defun org-babel-java--import-maybe (package class)
|
|
"Import from PACKAGE the given CLASS if it is used and not already imported."
|
|
(let (class-found import-found)
|
|
(goto-char (point-min))
|
|
(setq class-found (re-search-forward class nil t))
|
|
(goto-char (point-min))
|
|
(setq import-found (re-search-forward (concat "^import .*" package ".*" class ";") nil t))
|
|
(when (and class-found (not import-found))
|
|
(org-babel-java--move-past org-babel-java--package-re)
|
|
(insert (concat "import " package "." class ";\n")))))
|
|
|
|
(defun org-babel-expand-body:java (body params)
|
|
"Expand BODY with PARAMS.
|
|
BODY could be a few statements, or could include a full class
|
|
definition specifying package, imports, and class. Because we
|
|
allow this flexibility in what the source block can contain, it
|
|
is simplest to expand the code block from the inside out."
|
|
(let* ((fullclassname (or (cdr (assq :classname params)) ; class and package
|
|
(org-babel-java-find-classname body)))
|
|
(classname (car (last (split-string fullclassname "\\.")))) ; just class name
|
|
(packagename (if (seq-contains fullclassname ?.) ; just package name
|
|
(file-name-base fullclassname)))
|
|
(var-lines (org-babel-variable-assignments:java params))
|
|
(imports-val (assq :imports params))
|
|
(imports (if imports-val
|
|
(split-string (org-babel-read (cdr imports-val) nil) " ")
|
|
nil)))
|
|
(with-temp-buffer
|
|
(insert body)
|
|
|
|
;; wrap main. If there are methods defined, but no main method
|
|
;; and no class, wrap everything in a generic main method.
|
|
(goto-char (point-min))
|
|
(when (and (not (re-search-forward org-babel-java--class-re nil t))
|
|
(not (re-search-forward org-babel-java--any-method-re nil t)))
|
|
(org-babel-java--move-past org-babel-java--package-re) ; if package is defined, move past it
|
|
(org-babel-java--move-past org-babel-java--imports-re) ; if imports are defined, move past them
|
|
(insert "public static void main(String[] args) {\n")
|
|
(indent-code-rigidly (point) (point-max) 4)
|
|
(goto-char (point-max))
|
|
(insert "\n}"))
|
|
|
|
;; wrap class. If there's no class, wrap everything in a
|
|
;; generic class.
|
|
(goto-char (point-min))
|
|
(when (not (re-search-forward org-babel-java--class-re nil t))
|
|
(org-babel-java--move-past org-babel-java--package-re) ; if package is defined, move past it
|
|
(org-babel-java--move-past org-babel-java--imports-re) ; if imports are defined, move past them
|
|
(insert (concat "\npublic class " (file-name-base classname) " {\n"))
|
|
(indent-code-rigidly (point) (point-max) 4)
|
|
(goto-char (point-max))
|
|
(insert "\n}"))
|
|
(goto-char (point-min))
|
|
|
|
;; insert variables from source block headers
|
|
(when var-lines
|
|
(goto-char (point-min))
|
|
(org-babel-java--move-past org-babel-java--class-re) ; move inside class
|
|
(insert (mapconcat 'identity var-lines "\n"))
|
|
(insert "\n"))
|
|
|
|
;; add imports from source block headers
|
|
(when imports
|
|
(goto-char (point-min))
|
|
(org-babel-java--move-past org-babel-java--package-re) ; if package is defined, move past it
|
|
(insert (mapconcat (lambda (package) (concat "import " package ";")) imports "\n") "\n"))
|
|
|
|
;; add package at the top
|
|
(goto-char (point-min))
|
|
(when (and packagename (not (re-search-forward org-babel-java--package-re nil t)))
|
|
(insert (concat "package " packagename ";\n")))
|
|
|
|
;; return expanded body
|
|
(buffer-string))))
|
|
|
|
(defun org-babel-variable-assignments:java (params)
|
|
"Return a list of java statements assigning the block's variables.
|
|
variables are contained in PARAMS."
|
|
(mapcar
|
|
(lambda (pair)
|
|
(let* ((type-data (org-babel-java-val-to-type (cdr pair)))
|
|
(basetype (car type-data))
|
|
(var-to-java (lambda (var) (funcall #'org-babel-java-var-to-java var basetype))))
|
|
(format " static %s %s = %s;"
|
|
(cdr type-data) ; type
|
|
(car pair) ; name
|
|
(funcall var-to-java (cdr pair))))) ; value
|
|
(org-babel--get-vars params)))
|
|
|
|
(defun org-babel-java-var-to-java (var basetype)
|
|
"Convert an elisp value to a java variable.
|
|
Convert an elisp value, VAR, of type BASETYPE into a string of
|
|
java source code specifying a variable of the same value."
|
|
(cond ((and (sequencep var) (not (stringp var)))
|
|
(let ((var-to-java (lambda (var) (funcall #'org-babel-java-var-to-java var basetype))))
|
|
(concat "Arrays.asList(" (mapconcat var-to-java var ", ") ")")))
|
|
((eq var 'hline) org-babel-java-hline-to)
|
|
((eq basetype 'integerp) (format "%d" var))
|
|
((eq basetype 'floatp) (format "%f" var))
|
|
((eq basetype 'stringp) (if (and (stringp var) (string-match-p ".\n+." var))
|
|
(error "Java does not support multiline string literals")
|
|
(format "\"%s\"" var)))))
|
|
|
|
(defun org-babel-java-val-to-type (val)
|
|
"Determine the type of VAL.
|
|
Return (BASETYPE . LISTTYPE), where BASETYPE is a symbol
|
|
representing the type of the individual items in VAL, and
|
|
LISTTYPE is a string name of the type parameter for a container
|
|
for BASETYPE items."
|
|
(let* ((basetype (org-babel-java-val-to-base-type val))
|
|
(basetype-str (pcase basetype
|
|
(`integerp "Integer")
|
|
(`floatp "Double")
|
|
(`stringp "String")
|
|
(_ (error "Unknown type %S" basetype)))))
|
|
(cond
|
|
((and (listp val) (listp (car val))) ; a table
|
|
(cons basetype (format "List<List<%s>>" basetype-str)))
|
|
((or (listp val) (vectorp val)) ; a list declared in the source block header
|
|
(cons basetype (format "List<%s>" basetype-str)))
|
|
(t ; return base type
|
|
(cons basetype basetype-str)))))
|
|
|
|
(defun org-babel-java-val-to-base-type (val)
|
|
"Determine the base type of VAL.
|
|
VAL may be
|
|
`integerp' if all base values are integers
|
|
`floatp' if all base values are either floating points or integers
|
|
`stringp' otherwise."
|
|
(cond
|
|
((integerp val) 'integerp)
|
|
((floatp val) 'floatp)
|
|
((or (listp val) (vectorp val))
|
|
(let ((type nil))
|
|
(mapc (lambda (v)
|
|
(pcase (org-babel-java-val-to-base-type v)
|
|
(`stringp (setq type 'stringp))
|
|
(`floatp
|
|
(when (or (not type) (eq type 'integerp))
|
|
(setq type 'floatp)))
|
|
(`integerp
|
|
(unless type (setq type 'integerp)))))
|
|
val)
|
|
type))
|
|
(t 'stringp)))
|
|
|
|
(defun org-babel-java-table-or-string (results)
|
|
"Convert RESULTS into an appropriate elisp value.
|
|
If the results look like a list or vector, then convert them into an
|
|
Emacs-lisp table, otherwise return the results as a string."
|
|
(let ((res (org-babel-script-escape results)))
|
|
(if (listp res)
|
|
(mapcar (lambda (el) (if (eq 'null el)
|
|
org-babel-java-null-to
|
|
el))
|
|
res)
|
|
res)))
|
|
|
|
(defun org-babel-java-evaluate (cmd result-type result-params result-file)
|
|
"Evaluate using an external java process.
|
|
CMD the command to execute.
|
|
|
|
If RESULT-TYPE equals 'output then return standard output as a
|
|
string. If RESULT-TYPE equals 'value then return the value
|
|
returned by the source block, as elisp.
|
|
|
|
RESULT-PARAMS input params used to format the reponse.
|
|
|
|
RESULT-FILE filename of the tempfile to store the returned value in
|
|
for 'value RESULT-TYPE. Not used for 'output RESULT-TYPE."
|
|
(let ((raw (pcase result-type
|
|
('output (org-babel-eval cmd ""))
|
|
('value (org-babel-eval cmd "")
|
|
(org-babel-eval-read-file result-file)))))
|
|
(org-babel-result-cond result-params raw
|
|
(org-babel-java-table-or-string raw))))
|
|
|
|
(provide 'ob-java)
|
|
|
|
;;; ob-java.el ends here
|