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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 | } | ||