1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 // Flexible script object using AbstractJSObject subclass
  33 
  34 var AbstractJSObject = Java.type("jdk.nashorn.api.scripting.AbstractJSObject");
  35 
  36 // JSObject example that uses a map for properties and
  37 // falls back to with methods on a java object (for missing
  38 // properties
  39 
  40 function makeJSObj(map, fallback) {
  41     return new AbstractJSObject() {
  42         getMember: function(name) {
  43             if (map.containsKey(name)) {
  44                 return map.get(name);
  45             }
  46 
  47             var val = fallback[name];
  48             if (typeof val == 'function') {
  49                 return function() {
  50                    var a = arguments;
  51                    switch (a.length) {
  52                        case 0: return fallback[name]();
  53                        case 1: return fallback[name](a[0]);
  54                        case 2: return fallback[name](a[0], a[1]);
  55                        case 3: return fallback[name](a[0], a[1], a[2]);
  56                        case 4: return fallback[name](a[0], a[1], a[2], a[3]);
  57                    }
  58                 }
  59             }
  60         }
  61     }
  62 }
  63 
  64 var m = new java.util.HashMap();
  65 m.put("foo", 42);
  66 m.put("bar", 'hello');
  67 
  68 var obj = makeJSObj(m, new java.io.File("."));
  69 
  70 print(obj.foo);
  71 print(obj.bar);
  72 print(obj.getAbsolutePath());
  73 print(obj.isDirectory());