| /* |
| * Copyright (c) 2005, 2010, 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 sun.org.mozilla.javascript.internal.*; |
| import javax.script.*; |
| import java.security.AccessControlContext; |
| |
| /** |
| * This class serves as top level scope for Rhino. This class adds |
| * 3 top level functions (bindings, scope, sync) and two constructors |
| * (JSAdapter, JavaAdapter). |
| * |
| * @author A. Sundararajan |
| * @since 1.6 |
| */ |
| public final class RhinoTopLevel extends ImporterTopLevel { |
| RhinoTopLevel(Context cx, RhinoScriptEngine engine) { |
| // second boolean parameter to super constructor tells whether |
| // to seal standard JavaScript objects or not. If security manager |
| // is present, we seal the standard objects. |
| super(cx, System.getSecurityManager() != null); |
| this.engine = engine; |
| |
| // initialize JSAdapter lazily. Reduces footprint & startup time. |
| new LazilyLoadedCtor(this, "JSAdapter", |
| "com.sun.script.javascript.JSAdapter", |
| false); |
| |
| /* |
| * initialize JavaAdapter. We can't lazy initialize this because |
| * lazy initializer attempts to define a new property. But, JavaAdapter |
| * is an exisiting property that we overwrite. |
| */ |
| JavaAdapter.init(cx, this, false); |
| |
| // add top level functions |
| String names[] = { "bindings", "scope", "sync" }; |
| defineFunctionProperties(names, RhinoTopLevel.class, |
| ScriptableObject.DONTENUM); |
| } |
| |
| /** |
| * The bindings function takes a JavaScript scope object |
| * of type ExternalScriptable and returns the underlying Bindings |
| * instance. |
| * |
| * var page = scope(pageBindings); |
| * with (page) { |
| * // code that uses page scope |
| * } |
| * var b = bindings(page); |
| * // operate on bindings here. |
| */ |
| public static Object bindings(Context cx, Scriptable thisObj, Object[] args, |
| Function funObj) { |
| if (args.length == 1) { |
| Object arg = args[0]; |
| if (arg instanceof Wrapper) { |
| arg = ((Wrapper)arg).unwrap(); |
| } |
| if (arg instanceof ExternalScriptable) { |
| ScriptContext ctx = ((ExternalScriptable)arg).getContext(); |
| Bindings bind = ctx.getBindings(ScriptContext.ENGINE_SCOPE); |
| return Context.javaToJS(bind, |
| ScriptableObject.getTopLevelScope(thisObj)); |
| } |
| } |
| return cx.getUndefinedValue(); |
| } |
| |
| /** |
| * The scope function creates a new JavaScript scope object |
| * with given Bindings object as backing store. This can be used |
| * to create a script scope based on arbitrary Bindings instance. |
| * For example, in webapp scenario, a 'page' level Bindings instance |
| * may be wrapped as a scope and code can be run in JavaScripe 'with' |
| * statement: |
| * |
| * var page = scope(pageBindings); |
| * with (page) { |
| * // code that uses page scope |
| * } |
| */ |
| public static Object scope(Context cx, Scriptable thisObj, Object[] args, |
| Function funObj) { |
| if (args.length == 1) { |
| Object arg = args[0]; |
| if (arg instanceof Wrapper) { |
| arg = ((Wrapper)arg).unwrap(); |
| } |
| if (arg instanceof Bindings) { |
| ScriptContext ctx = new SimpleScriptContext(); |
| ctx.setBindings((Bindings)arg, ScriptContext.ENGINE_SCOPE); |
| Scriptable res = new ExternalScriptable(ctx); |
| res.setPrototype(ScriptableObject.getObjectPrototype(thisObj)); |
| res.setParentScope(ScriptableObject.getTopLevelScope(thisObj)); |
| return res; |
| } |
| } |
| return cx.getUndefinedValue(); |
| } |
| |
| /** |
| * The sync function creates a synchronized function (in the sense |
| * of a Java synchronized method) from an existing function. The |
| * new function synchronizes on the <code>this</code> object of |
| * its invocation. |
| * js> var o = { f : sync(function(x) { |
| * print("entry"); |
| * Packages.java.lang.Thread.sleep(x*1000); |
| * print("exit"); |
| * })}; |
| * js> thread(function() {o.f(5);}); |
| * entry |
| * js> thread(function() {o.f(5);}); |
| * js> |
| * exit |
| * entry |
| * exit |
| */ |
| public static Object sync(Context cx, Scriptable thisObj, Object[] args, |
| Function funObj) { |
| if (args.length == 1 && args[0] instanceof Function) { |
| return new Synchronizer((Function)args[0]); |
| } else { |
| throw Context.reportRuntimeError("wrong argument(s) for sync"); |
| } |
| } |
| |
| RhinoScriptEngine getScriptEngine() { |
| return engine; |
| } |
| |
| AccessControlContext getAccessContext() { |
| return engine.getAccessContext(); |
| } |
| |
| private RhinoScriptEngine engine; |
| } |