Showing the changes to java/pkg/com/sun/script/javascript/RhinoTopLevel.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,156 @@ | ||
| 1 | +/* | |
| 2 | + * Copyright (c) 2005, 2010, 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 sun.org.mozilla.javascript.internal.*; | |
| 29 | +import javax.script.*; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * This class serves as top level scope for Rhino. This class adds | |
| 33 | + * 3 top level functions (bindings, scope, sync) and two constructors | |
| 34 | + * (JSAdapter, JavaAdapter). | |
| 35 | + * | |
| 36 | + * @author A. Sundararajan | |
| 37 | + * @since 1.6 | |
| 38 | + */ | |
| 39 | +public final class RhinoTopLevel extends ImporterTopLevel { | |
| 40 | + RhinoTopLevel(Context cx, RhinoScriptEngine engine) { | |
| 41 | + super(cx); | |
| 42 | + this.engine = engine; | |
| 43 | + | |
| 44 | + | |
| 45 | + // initialize JSAdapter lazily. Reduces footprint & startup time. | |
| 46 | + new LazilyLoadedCtor(this, "JSAdapter", | |
| 47 | + "com.sun.script.javascript.JSAdapter", | |
| 48 | + false); | |
| 49 | + | |
| 50 | + /* | |
| 51 | + * initialize JavaAdapter. We can't lazy initialize this because | |
| 52 | + * lazy initializer attempts to define a new property. But, JavaAdapter | |
| 53 | + * is an exisiting property that we overwrite. | |
| 54 | + */ | |
| 55 | + JavaAdapter.init(cx, this, false); | |
| 56 | + | |
| 57 | + // add top level functions | |
| 58 | + String names[] = { "bindings", "scope", "sync" }; | |
| 59 | + defineFunctionProperties(names, RhinoTopLevel.class, | |
| 60 | + ScriptableObject.DONTENUM); | |
| 61 | + } | |
| 62 | + | |
| 63 | + /** | |
| 64 | + * The bindings function takes a JavaScript scope object | |
| 65 | + * of type ExternalScriptable and returns the underlying Bindings | |
| 66 | + * instance. | |
| 67 | + * | |
| 68 | + * var page = scope(pageBindings); | |
| 69 | + * with (page) { | |
| 70 | + * // code that uses page scope | |
| 71 | + * } | |
| 72 | + * var b = bindings(page); | |
| 73 | + * // operate on bindings here. | |
| 74 | + */ | |
| 75 | + public static Object bindings(Context cx, Scriptable thisObj, Object[] args, | |
| 76 | + Function funObj) { | |
| 77 | + if (args.length == 1) { | |
| 78 | + Object arg = args[0]; | |
| 79 | + if (arg instanceof Wrapper) { | |
| 80 | + arg = ((Wrapper)arg).unwrap(); | |
| 81 | + } | |
| 82 | + if (arg instanceof ExternalScriptable) { | |
| 83 | + ScriptContext ctx = ((ExternalScriptable)arg).getContext(); | |
| 84 | + Bindings bind = ctx.getBindings(ScriptContext.ENGINE_SCOPE); | |
| 85 | + return Context.javaToJS(bind, | |
| 86 | + ScriptableObject.getTopLevelScope(thisObj)); | |
| 87 | + } | |
| 88 | + } | |
| 89 | + return cx.getUndefinedValue(); | |
| 90 | + } | |
| 91 | + | |
| 92 | + /** | |
| 93 | + * The scope function creates a new JavaScript scope object | |
| 94 | + * with given Bindings object as backing store. This can be used | |
| 95 | + * to create a script scope based on arbitrary Bindings instance. | |
| 96 | + * For example, in webapp scenario, a 'page' level Bindings instance | |
| 97 | + * may be wrapped as a scope and code can be run in JavaScripe 'with' | |
| 98 | + * statement: | |
| 99 | + * | |
| 100 | + * var page = scope(pageBindings); | |
| 101 | + * with (page) { | |
| 102 | + * // code that uses page scope | |
| 103 | + * } | |
| 104 | + */ | |
| 105 | + public static Object scope(Context cx, Scriptable thisObj, Object[] args, | |
| 106 | + Function funObj) { | |
| 107 | + if (args.length == 1) { | |
| 108 | + Object arg = args[0]; | |
| 109 | + if (arg instanceof Wrapper) { | |
| 110 | + arg = ((Wrapper)arg).unwrap(); | |
| 111 | + } | |
| 112 | + if (arg instanceof Bindings) { | |
| 113 | + ScriptContext ctx = new SimpleScriptContext(); | |
| 114 | + ctx.setBindings((Bindings)arg, ScriptContext.ENGINE_SCOPE); | |
| 115 | + Scriptable res = new ExternalScriptable(ctx); | |
| 116 | + res.setPrototype(ScriptableObject.getObjectPrototype(thisObj)); | |
| 117 | + res.setParentScope(ScriptableObject.getTopLevelScope(thisObj)); | |
| 118 | + return res; | |
| 119 | + } | |
| 120 | + } | |
| 121 | + return cx.getUndefinedValue(); | |
| 122 | + } | |
| 123 | + | |
| 124 | + /** | |
| 125 | + * The sync function creates a synchronized function (in the sense | |
| 126 | + * of a Java synchronized method) from an existing function. The | |
| 127 | + * new function synchronizes on the <code>this</code> object of | |
| 128 | + * its invocation. | |
| 129 | + * js> var o = { f : sync(function(x) { | |
| 130 | + * print("entry"); | |
| 131 | + * Packages.java.lang.Thread.sleep(x*1000); | |
| 132 | + * print("exit"); | |
| 133 | + * })}; | |
| 134 | + * js> thread(function() {o.f(5);}); | |
| 135 | + * entry | |
| 136 | + * js> thread(function() {o.f(5);}); | |
| 137 | + * js> | |
| 138 | + * exit | |
| 139 | + * entry | |
| 140 | + * exit | |
| 141 | + */ | |
| 142 | + public static Object sync(Context cx, Scriptable thisObj, Object[] args, | |
| 143 | + Function funObj) { | |
| 144 | + if (args.length == 1 && args[0] instanceof Function) { | |
| 145 | + return new Synchronizer((Function)args[0]); | |
| 146 | + } else { | |
| 147 | + throw Context.reportRuntimeError("wrong argument(s) for sync"); | |
| 148 | + } | |
| 149 | + } | |
| 150 | + | |
| 151 | + RhinoScriptEngine getScriptEngine() { | |
| 152 | + return engine; | |
| 153 | + } | |
| 154 | + | |
| 155 | + private RhinoScriptEngine engine; | |
| 156 | +} | |