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