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());