1 /*
   2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /**
  27  * Parse function returns a JSON object representing ECMAScript code passed.
  28  * name is optional name for the code source and location param tells whether to
  29  * include location information for AST nodes or not.
  30  *
  31  * Example:
  32  *
  33  *    load("nashorn:parser.js");
  34  *    try {
  35  *        var json = parse("print('hello')");
  36  *        print(JSON.stringify(json));
  37  *    } catch (e) {
  38  *        print(e);
  39  *    }
  40  */
  41 function parse(/*code, [name], [location]*/) {
  42     var code, name = "<unknown>", location = false;
  43     switch (arguments.length) {
  44         case 3:
  45             location = arguments[2];
  46         case 2:
  47             name = arguments[1];
  48         case 1:
  49             code = arguments[0];
  50     }
  51 
  52     var jsonStr = Packages.jdk.nashorn.api.scripting.ScriptUtils.parse(code, name, location);
  53     return JSON.parse(jsonStr,
  54         function (prop, value) {
  55             if (typeof(value) == 'string' && prop == "value") {
  56                 // handle regexps and strings - both are encoded as strings but strings
  57                 // do not start with '/'. If regexp, then eval it to make RegExp object
  58                 return value.startsWith('/')? eval(value) : value.substring(1);
  59             } else {
  60                 // anything else is returned "as is"
  61                 return value;
  62             }
  63         });
  64 }
  65