322 lines
12 KiB
Java
322 lines
12 KiB
Java
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1999.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1997-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Norris Boyd
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* Igor Bukanov
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* Bob Jervis
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* Mike McCabe
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License Version 2 or later (the "GPL"), in which
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* case the provisions of the GPL are applicable instead of those above. If
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* you wish to allow use of your version of this file only under the terms of
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* the GPL and not to allow others to use your version of this file under the
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* MPL, indicate your decision by deleting the provisions above and replacing
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* them with the notice and other provisions required by the GPL. If you do
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* not delete the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.javascript;
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/**
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* This class implements the Object native object.
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* See ECMA 15.2.
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* @author Norris Boyd
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*/
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public class NativeObject extends IdScriptableObject
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{
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static final long serialVersionUID = -6345305608474346996L;
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private static final Object OBJECT_TAG = "Object";
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static void init(Scriptable scope, boolean sealed)
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{
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NativeObject obj = new NativeObject();
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obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
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}
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@Override
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public String getClassName()
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{
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return "Object";
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}
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@Override
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public String toString()
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{
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return ScriptRuntime.defaultObjectToString(this);
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}
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@Override
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protected void initPrototypeId(int id)
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{
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String s;
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int arity;
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switch (id) {
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case Id_constructor: arity=1; s="constructor"; break;
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case Id_toString: arity=0; s="toString"; break;
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case Id_toLocaleString: arity=0; s="toLocaleString"; break;
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case Id_valueOf: arity=0; s="valueOf"; break;
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case Id_hasOwnProperty: arity=1; s="hasOwnProperty"; break;
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case Id_propertyIsEnumerable:
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arity=1; s="propertyIsEnumerable"; break;
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case Id_isPrototypeOf: arity=1; s="isPrototypeOf"; break;
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case Id_toSource: arity=0; s="toSource"; break;
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case Id___defineGetter__:
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arity=2; s="__defineGetter__"; break;
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case Id___defineSetter__:
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arity=2; s="__defineSetter__"; break;
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case Id___lookupGetter__:
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arity=1; s="__lookupGetter__"; break;
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case Id___lookupSetter__:
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arity=1; s="__lookupSetter__"; break;
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default: throw new IllegalArgumentException(String.valueOf(id));
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}
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initPrototypeMethod(OBJECT_TAG, id, s, arity);
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}
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@Override
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public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
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Scriptable thisObj, Object[] args)
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{
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if (!f.hasTag(OBJECT_TAG)) {
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return super.execIdCall(f, cx, scope, thisObj, args);
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}
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int id = f.methodId();
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switch (id) {
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case Id_constructor: {
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if (thisObj != null) {
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// BaseFunction.construct will set up parent, proto
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return f.construct(cx, scope, args);
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}
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if (args.length == 0 || args[0] == null
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|| args[0] == Undefined.instance)
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{
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return new NativeObject();
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}
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return ScriptRuntime.toObject(cx, scope, args[0]);
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}
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case Id_toLocaleString: // For now just alias toString
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case Id_toString: {
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if (cx.hasFeature(Context.FEATURE_TO_STRING_AS_SOURCE)) {
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String s = ScriptRuntime.defaultObjectToSource(cx, scope,
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thisObj, args);
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int L = s.length();
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if (L != 0 && s.charAt(0) == '(' && s.charAt(L - 1) == ')') {
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// Strip () that surrounds toSource
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s = s.substring(1, L - 1);
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}
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return s;
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}
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return ScriptRuntime.defaultObjectToString(thisObj);
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}
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case Id_valueOf:
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return thisObj;
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case Id_hasOwnProperty: {
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boolean result;
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if (args.length == 0) {
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result = false;
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} else {
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String s = ScriptRuntime.toStringIdOrIndex(cx, args[0]);
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if (s == null) {
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int index = ScriptRuntime.lastIndexResult(cx);
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result = thisObj.has(index, thisObj);
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} else {
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result = thisObj.has(s, thisObj);
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}
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}
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return ScriptRuntime.wrapBoolean(result);
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}
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case Id_propertyIsEnumerable: {
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boolean result;
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if (args.length == 0) {
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result = false;
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} else {
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String s = ScriptRuntime.toStringIdOrIndex(cx, args[0]);
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if (s == null) {
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int index = ScriptRuntime.lastIndexResult(cx);
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result = thisObj.has(index, thisObj);
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if (result && thisObj instanceof ScriptableObject) {
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ScriptableObject so = (ScriptableObject)thisObj;
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int attrs = so.getAttributes(index);
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result = ((attrs & ScriptableObject.DONTENUM) == 0);
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}
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} else {
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result = thisObj.has(s, thisObj);
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if (result && thisObj instanceof ScriptableObject) {
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ScriptableObject so = (ScriptableObject)thisObj;
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int attrs = so.getAttributes(s);
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result = ((attrs & ScriptableObject.DONTENUM) == 0);
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}
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}
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}
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return ScriptRuntime.wrapBoolean(result);
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}
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case Id_isPrototypeOf: {
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boolean result = false;
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if (args.length != 0 && args[0] instanceof Scriptable) {
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Scriptable v = (Scriptable) args[0];
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do {
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v = v.getPrototype();
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if (v == thisObj) {
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result = true;
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break;
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}
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} while (v != null);
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}
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return ScriptRuntime.wrapBoolean(result);
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}
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case Id_toSource:
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return ScriptRuntime.defaultObjectToSource(cx, scope, thisObj,
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args);
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case Id___defineGetter__:
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case Id___defineSetter__:
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{
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if (args.length < 2 || !(args[1] instanceof Callable)) {
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Object badArg = (args.length >= 2 ? args[1]
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: Undefined.instance);
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throw ScriptRuntime.notFunctionError(badArg);
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}
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if (!(thisObj instanceof ScriptableObject)) {
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throw Context.reportRuntimeError2(
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"msg.extend.scriptable",
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thisObj.getClass().getName(),
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String.valueOf(args[0]));
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}
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ScriptableObject so = (ScriptableObject)thisObj;
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String name = ScriptRuntime.toStringIdOrIndex(cx, args[0]);
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int index = (name != null ? 0
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: ScriptRuntime.lastIndexResult(cx));
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Callable getterOrSetter = (Callable)args[1];
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boolean isSetter = (id == Id___defineSetter__);
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so.setGetterOrSetter(name, index, getterOrSetter, isSetter);
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if (so instanceof NativeArray)
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((NativeArray)so).setDenseOnly(false);
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}
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return Undefined.instance;
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case Id___lookupGetter__:
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case Id___lookupSetter__:
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{
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if (args.length < 1 ||
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!(thisObj instanceof ScriptableObject))
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return Undefined.instance;
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ScriptableObject so = (ScriptableObject)thisObj;
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String name = ScriptRuntime.toStringIdOrIndex(cx, args[0]);
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int index = (name != null ? 0
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: ScriptRuntime.lastIndexResult(cx));
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boolean isSetter = (id == Id___lookupSetter__);
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Object gs;
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for (;;) {
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gs = so.getGetterOrSetter(name, index, isSetter);
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if (gs != null)
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break;
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// If there is no getter or setter for the object itself,
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// how about the prototype?
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Scriptable v = so.getPrototype();
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if (v == null)
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break;
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if (v instanceof ScriptableObject)
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so = (ScriptableObject)v;
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else
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break;
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}
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if (gs != null)
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return gs;
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}
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return Undefined.instance;
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default:
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throw new IllegalArgumentException(String.valueOf(id));
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}
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}
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// #string_id_map#
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@Override
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protected int findPrototypeId(String s)
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{
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int id;
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// #generated# Last update: 2007-05-09 08:15:55 EDT
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L0: { id = 0; String X = null; int c;
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L: switch (s.length()) {
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case 7: X="valueOf";id=Id_valueOf; break L;
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case 8: c=s.charAt(3);
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if (c=='o') { X="toSource";id=Id_toSource; }
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else if (c=='t') { X="toString";id=Id_toString; }
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break L;
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case 11: X="constructor";id=Id_constructor; break L;
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case 13: X="isPrototypeOf";id=Id_isPrototypeOf; break L;
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case 14: c=s.charAt(0);
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if (c=='h') { X="hasOwnProperty";id=Id_hasOwnProperty; }
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else if (c=='t') { X="toLocaleString";id=Id_toLocaleString; }
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break L;
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case 16: c=s.charAt(2);
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if (c=='d') {
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c=s.charAt(8);
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if (c=='G') { X="__defineGetter__";id=Id___defineGetter__; }
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else if (c=='S') { X="__defineSetter__";id=Id___defineSetter__; }
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}
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else if (c=='l') {
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c=s.charAt(8);
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if (c=='G') { X="__lookupGetter__";id=Id___lookupGetter__; }
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else if (c=='S') { X="__lookupSetter__";id=Id___lookupSetter__; }
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}
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break L;
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case 20: X="propertyIsEnumerable";id=Id_propertyIsEnumerable; break L;
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}
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if (X!=null && X!=s && !X.equals(s)) id = 0;
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break L0;
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}
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// #/generated#
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return id;
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}
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private static final int
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Id_constructor = 1,
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Id_toString = 2,
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Id_toLocaleString = 3,
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Id_valueOf = 4,
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Id_hasOwnProperty = 5,
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Id_propertyIsEnumerable = 6,
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Id_isPrototypeOf = 7,
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Id_toSource = 8,
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Id___defineGetter__ = 9,
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Id___defineSetter__ = 10,
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Id___lookupGetter__ = 11,
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Id___lookupSetter__ = 12,
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MAX_PROTOTYPE_ID = 12;
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// #/string_id_map#
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}
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