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| 1 | +/* | |
| 2 | + * Copyright (c) 2005, 2006, 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 | +package com.sun.script.javascript; | |
| 27 | + | |
| 28 | +import javax.script.Invocable; | |
| 29 | +import sun.org.mozilla.javascript.internal.*; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * This class implements Rhino-like JavaAdapter to help implement a Java | |
| 33 | + * interface in JavaScript. We support this using Invocable.getInterface. | |
| 34 | + * Using this JavaAdapter, script author could write: | |
| 35 | + * | |
| 36 | + * var r = new java.lang.Runnable() { | |
| 37 | + * run: function() { script... } | |
| 38 | + * }; | |
| 39 | + * | |
| 40 | + * r.run(); | |
| 41 | + * new java.lang.Thread(r).start(); | |
| 42 | + * | |
| 43 | + * Note that Rhino's JavaAdapter support allows extending a Java class and/or | |
| 44 | + * implementing one or more interfaces. This JavaAdapter implementation does | |
| 45 | + * not support these. | |
| 46 | + * | |
| 47 | + * @author A. Sundararajan | |
| 48 | + * @since 1.6 | |
| 49 | + */ | |
| 50 | +final class JavaAdapter extends ScriptableObject implements Function { | |
| 51 | + private JavaAdapter(Invocable engine) { | |
| 52 | + this.engine = engine; | |
| 53 | + } | |
| 54 | + | |
| 55 | + static void init(Context cx, Scriptable scope, boolean sealed) | |
| 56 | + throws RhinoException { | |
| 57 | + RhinoTopLevel topLevel = (RhinoTopLevel) scope; | |
| 58 | + Invocable engine = topLevel.getScriptEngine(); | |
| 59 | + JavaAdapter obj = new JavaAdapter(engine); | |
| 60 | + obj.setParentScope(scope); | |
| 61 | + obj.setPrototype(getFunctionPrototype(scope)); | |
| 62 | + /* | |
| 63 | + * Note that we can't use defineProperty. A property of this | |
| 64 | + * name is already defined in Context.initStandardObjects. We | |
| 65 | + * simply overwrite the property value! | |
| 66 | + */ | |
| 67 | + ScriptableObject.putProperty(topLevel, "JavaAdapter", obj); | |
| 68 | + } | |
| 69 | + | |
| 70 | + public String getClassName() { | |
| 71 | + return "JavaAdapter"; | |
| 72 | + } | |
| 73 | + | |
| 74 | + public Object call(Context cx, Scriptable scope, Scriptable thisObj, | |
| 75 | + Object[] args) throws RhinoException { | |
| 76 | + return construct(cx, scope, args); | |
| 77 | + } | |
| 78 | + | |
| 79 | + public Scriptable construct(Context cx, Scriptable scope, Object[] args) | |
| 80 | + throws RhinoException { | |
| 81 | + if (args.length == 2) { | |
| 82 | + Class<?> clazz = null; | |
| 83 | + Object obj1 = args[0]; | |
| 84 | + if (obj1 instanceof Wrapper) { | |
| 85 | + Object o = ((Wrapper)obj1).unwrap(); | |
| 86 | + if (o instanceof Class && ((Class)o).isInterface()) { | |
| 87 | + clazz = (Class) o; | |
| 88 | + } | |
| 89 | + } else if (obj1 instanceof Class) { | |
| 90 | + if (((Class)obj1).isInterface()) { | |
| 91 | + clazz = (Class) obj1; | |
| 92 | + } | |
| 93 | + } | |
| 94 | + if (clazz == null) { | |
| 95 | + throw Context.reportRuntimeError("JavaAdapter: first arg should be interface Class"); | |
| 96 | + } | |
| 97 | + | |
| 98 | + Scriptable topLevel = ScriptableObject.getTopLevelScope(scope); | |
| 99 | + return cx.toObject(engine.getInterface(args[1], clazz), topLevel); | |
| 100 | + } else { | |
| 101 | + throw Context.reportRuntimeError("JavaAdapter requires two arguments"); | |
| 102 | + } | |
| 103 | + } | |
| 104 | + | |
| 105 | + private Invocable engine; | |
| 106 | +} | |