org.mozilla.javascript.NativeObject Maven / Gradle / Ivy
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
import java.util.*;
/**
* This class implements the Object native object.
* See ECMA 15.2.
* @author Norris Boyd
*/
public class NativeObject extends IdScriptableObject implements Map
{
static final long serialVersionUID = -6345305608474346996L;
private static final Object OBJECT_TAG = "Object";
static void init(Scriptable scope, boolean sealed)
{
NativeObject obj = new NativeObject();
obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
}
@Override
public String getClassName()
{
return "Object";
}
@Override
public String toString()
{
return ScriptRuntime.defaultObjectToString(this);
}
@Override
protected void fillConstructorProperties(IdFunctionObject ctor)
{
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_getPrototypeOf,
"getPrototypeOf", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_keys,
"keys", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_getOwnPropertyNames,
"getOwnPropertyNames", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_getOwnPropertySymbols,
"getOwnPropertySymbols", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_getOwnPropertyDescriptor,
"getOwnPropertyDescriptor", 2);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_defineProperty,
"defineProperty", 3);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_isExtensible,
"isExtensible", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_preventExtensions,
"preventExtensions", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_defineProperties,
"defineProperties", 2);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_create,
"create", 2);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_isSealed,
"isSealed", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_isFrozen,
"isFrozen", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_seal,
"seal", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_freeze,
"freeze", 1);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_assign,
"assign", 2);
addIdFunctionProperty(ctor, OBJECT_TAG, ConstructorId_is,
"is", 2);
super.fillConstructorProperties(ctor);
}
@Override
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);
}
@Override
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: {
Object toString = ScriptableObject.getProperty(thisObj, "toString");
if(!(toString instanceof Callable)) {
throw ScriptRuntime.notFunctionError(toString);
}
Callable fun = (Callable)toString;
return fun.call(cx, scope, thisObj, ScriptRuntime.emptyArgs);
}
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;
Object arg = args.length < 1 ? Undefined.instance : args[0];
if (arg instanceof Symbol) {
result = ensureSymbolScriptable(thisObj).has((Symbol) arg, thisObj);
} else {
String s = ScriptRuntime.toStringIdOrIndex(cx, arg);
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;
Object arg = args.length < 1 ? Undefined.instance : args[0];
if (arg instanceof Symbol) {
result = ((SymbolScriptable)thisObj).has((Symbol)arg, thisObj);
if (result && thisObj instanceof ScriptableObject) {
ScriptableObject so = (ScriptableObject)thisObj;
int attrs = so.getAttributes((Symbol)arg);
result = ((attrs & ScriptableObject.DONTENUM) == 0);
}
} else {
String s = ScriptRuntime.toStringIdOrIndex(cx, arg);
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);
if (so instanceof NativeArray)
((NativeArray)so).setDenseOnly(false);
}
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;
case ConstructorId_getPrototypeOf:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable obj = getCompatibleObject(cx, scope, arg);
return obj.getPrototype();
}
case ConstructorId_keys:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable obj = getCompatibleObject(cx, scope, arg);
Object[] ids = obj.getIds();
for (int i = 0; i < ids.length; i++) {
ids[i] = ScriptRuntime.toString(ids[i]);
}
return cx.newArray(scope, ids);
}
case ConstructorId_getOwnPropertyNames:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable s = getCompatibleObject(cx, scope, arg);
ScriptableObject obj = ensureScriptableObject(s);
Object[] ids = obj.getIds(true, false);
for (int i = 0; i < ids.length; i++) {
ids[i] = ScriptRuntime.toString(ids[i]);
}
return cx.newArray(scope, ids);
}
case ConstructorId_getOwnPropertySymbols:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable s = getCompatibleObject(cx, scope, arg);
ScriptableObject obj = ensureScriptableObject(s);
Object[] ids = obj.getIds(true, true);
ArrayList