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Common Lisp implementation running on the JVM
;;; abcl-script.lisp
;;;
;;; Copyright (C) 2008 Alessio Stalla
;;;
;;; This program 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 2
;;; of the License, or (at your option) any later version.
;;;
;;; This program 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 this program; if not, write to the Free Software
;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
;;;
;;; As a special exception, the copyright holders of this library give you
;;; permission to link this library with independent modules to produce an
;;; executable, regardless of the license terms of these independent
;;; modules, and to copy and distribute the resulting executable under
;;; terms of your choice, provided that you also meet, for each linked
;;; independent module, the terms and conditions of the license of that
;;; module. An independent module is a module which is not derived from
;;; or based on this library. If you modify this library, you may extend
;;; this exception to your version of the library, but you are not
;;; obligated to do so. If you do not wish to do so, delete this
;;; exception statement from your version.
(in-package :abcl-script)
(defconstant +global-scope+
(jfield "javax.script.ScriptContext" "GLOBAL_SCOPE"))
(defconstant +engine-scope+
(jfield "javax.script.ScriptContext" "ENGINE_SCOPE"))
(defconstant +put-binding+ (jmethod "javax.script.Bindings"
"put"
"java.lang.String"
"java.lang.Object"))
(defconstant +get-bindings+ (jmethod "javax.script.ScriptContext"
"getBindings"
"int"))
(defun generate-bindings (bindings)
(let ((*package* (find-package :abcl-script-user)))
(mapcar (lambda (binding) (list (read-from-string (car binding))
(cdr binding)))
bindings)))
(defun generate-special-declarations (bindings)
(let ((*package* (find-package :abcl-script-user)))
`(declare (special
,@(mapcar (lambda (binding) (read-from-string (car binding)))
bindings)))))
(defun generate-java-bindings (bindings-list actual-bindings java-bindings)
(loop :for binding :in actual-bindings
:for jbinding :in bindings-list
:collect `(jcall +put-binding+
,java-bindings ,(car jbinding) ,(car binding))))
(defmacro eval-in-script-context ((global-bindings engine-bindings stdin stdout script-context)
body)
"Sets up a context in which to evaluate a piece of code coming from Java through the JSR-223 methods."
(let ((actual-global-bindings (gensym))
(actual-engine-bindings (gensym)))
`(let ((*package* (find-package :abcl-script-user))
(*standard-input* ,stdin)
(*standard-output* ,stdout)
(,actual-global-bindings (generate-bindings ,global-bindings))
(,actual-engine-bindings (generate-bindings ,engine-bindings)))
(eval `(let (,@,actual-global-bindings)
(let (,@,actual-engine-bindings)
,(generate-special-declarations ,global-bindings)
,(generate-special-declarations ,engine-bindings)
(prog1
(progn ,@,body)
(finish-output *standard-output*)
,@(generate-java-bindings
,global-bindings
,actual-global-bindings
(jcall +get-bindings+ ,script-context +global-scope+))
,@(generate-java-bindings
,engine-bindings
,actual-engine-bindings
(jcall +get-bindings+ ,script-context +engine-scope+)))))))))
(defun eval-function (global-bindings engine-bindings stdin stdout function-and-args script-context)
(eval-in-script-context (global-bindings engine-bindings stdin stdout script-context)
`((funcall ,@(mapcar (lambda (arg) `(quote ,arg))
function-and-args)))))
(defun eval-script (global-bindings engine-bindings stdin stdout
code-string script-context)
(eval-in-script-context (global-bindings engine-bindings stdin stdout script-context)
`((with-input-from-string (str ,code-string)
(sys::load-returning-last-result str)))))
(defun eval-compiled-script (global-bindings engine-bindings stdin stdout
function script-context)
(eval-in-script-context (global-bindings engine-bindings stdin stdout script-context)
`((funcall ,function))))
(defun compile-script (code-string)
(let* ((tmp-file (jstatic (jmethod "java.io.File" "createTempFile" "java.lang.String" "java.lang.String")
nil "abcl-src-file-" ".lisp"))
(tmp-file-path (jcall (jmethod "java.io.File" "getAbsolutePath") tmp-file)))
(jcall (jmethod "java.io.File" "deleteOnExit") tmp-file) ;to be really-really-really sure...
(unwind-protect
(progn
(with-open-file (stream tmp-file-path :direction :output)
(princ "(in-package :abcl-script-user)" stream)
(princ code-string stream)
(finish-output stream))
(let ((compiled-file (compile-file tmp-file-path)))
(jcall (jmethod "java.io.File" "deleteOnExit")
(jnew (jconstructor "java.io.File" "java.lang.String")
(namestring compiled-file)))
(lambda ()
(let ((*package* (find-package :abcl-script-user)))
(sys::load-returning-last-result compiled-file)))))
(delete-file tmp-file-path))))
;;Java interface implementation - TODO
(defvar *interface-implementation-map* (make-hash-table :test #'equal))
(defun find-java-interface-implementation (interface)
(gethash interface *interface-implementation-map*))
(defun register-java-interface-implementation (interface implementation &optional lisp-this)
(setf (gethash interface *interface-implementation-map*)
(jmake-proxy interface implementation lisp-this)))
(defun remove-java-interface-implementation (interface)
(remhash interface *interface-implementation-map*))
;Let's load it so asdf package is already defined when loading config.lisp
(require 'asdf)