/* * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.script.javascript; import javax.script.Invocable;import sun.org.mozilla.javascript.internal.*; /** * This class implements Rhino-like JavaAdapter to help implement a Java * interface in JavaScript. We support this using Invocable.getInterface. * Using this JavaAdapter, script author could write: * *    var r = new java.lang.Runnable() { *                run: function() { script... } *            }; * *    r.run(); *    new java.lang.Thread(r).start(); * * Note that Rhino's JavaAdapter support allows extending a Java class and/or * implementing one or more interfaces. This JavaAdapter implementation does * not support these. * * @author A. Sundararajan * @since 1.6 */final class JavaAdapter extends ScriptableObject implements Function {    private JavaAdapter(Invocable engine) {        this.engine = engine;    }     static void init(Context cx, Scriptable scope, boolean sealed)    throws RhinoException {        RhinoTopLevel topLevel = (RhinoTopLevel) scope;        Invocable engine = topLevel.getScriptEngine();        JavaAdapter obj = new JavaAdapter(engine);        obj.setParentScope(scope);        obj.setPrototype(getFunctionPrototype(scope));        /*         * Note that we can't use defineProperty. A property of this         * name is already defined in Context.initStandardObjects. We         * simply overwrite the property value!         */        ScriptableObject.putProperty(topLevel, "JavaAdapter", obj);    }     public String getClassName() {        return "JavaAdapter";    }     public Object call(Context cx, Scriptable scope, Scriptable thisObj,            Object[] args) throws RhinoException {        return construct(cx, scope, args);    }     public Scriptable construct(Context cx, Scriptable scope, Object[] args)    throws RhinoException {        if (args.length == 2) {            Class<?> clazz = null;            Object obj1 = args[0];            if (obj1 instanceof Wrapper) {                Object o = ((Wrapper)obj1).unwrap();                if (o instanceof Class && ((Class)o).isInterface()) {                    clazz = (Class) o;                }            } else if (obj1 instanceof Class) {                if (((Class)obj1).isInterface()) {                    clazz = (Class) obj1;                }            }            if (clazz == null) {                throw Context.reportRuntimeError("JavaAdapter: first arg should be interface Class");            }             Scriptable topLevel = ScriptableObject.getTopLevelScope(scope);            return cx.toObject(engine.getInterface(args[1],  clazz), topLevel);        } else {            throw Context.reportRuntimeError("JavaAdapter requires two arguments");        }    }     private Invocable engine;}