/* -*- 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.AbstractCollection;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
/**
* 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_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);
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];
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];
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 = ensureScriptable(arg);
return obj.getPrototype();
}
case ConstructorId_keys:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable obj = ensureScriptable(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];
ScriptableObject obj = ensureScriptableObject(arg);
Object[] ids = obj.getAllIds();
for (int i = 0; i < ids.length; i++) {
ids[i] = ScriptRuntime.toString(ids[i]);
}
return cx.newArray(scope, ids);
}
case ConstructorId_getOwnPropertyDescriptor:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
// TODO(norris): There's a deeper issue here if
// arg instanceof Scriptable. Should we create a new
// interface to admit the new ECMAScript 5 operations?
ScriptableObject obj = ensureScriptableObject(arg);
Object nameArg = args.length < 2 ? Undefined.instance : args[1];
String name = ScriptRuntime.toString(nameArg);
Scriptable desc = obj.getOwnPropertyDescriptor(cx, name);
return desc == null ? Undefined.instance : desc;
}
case ConstructorId_defineProperty:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
Object name = args.length < 2 ? Undefined.instance : args[1];
Object descArg = args.length < 3 ? Undefined.instance : args[2];
ScriptableObject desc = ensureScriptableObject(descArg);
obj.defineOwnProperty(cx, name, desc);
return obj;
}
case ConstructorId_isExtensible:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
return Boolean.valueOf(obj.isExtensible());
}
case ConstructorId_preventExtensions:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
obj.preventExtensions();
return obj;
}
case ConstructorId_defineProperties:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
Object propsObj = args.length < 2 ? Undefined.instance : args[1];
Scriptable props = Context.toObject(propsObj, getParentScope());
obj.defineOwnProperties(cx, ensureScriptableObject(props));
return obj;
}
case ConstructorId_create:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
Scriptable obj = (arg == null) ? null : ensureScriptable(arg);
ScriptableObject newObject = new NativeObject();
newObject.setParentScope(getParentScope());
newObject.setPrototype(obj);
if (args.length > 1 && args[1] != Undefined.instance) {
Scriptable props = Context.toObject(args[1], getParentScope());
newObject.defineOwnProperties(cx, ensureScriptableObject(props));
}
return newObject;
}
case ConstructorId_isSealed:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
if (obj.isExtensible()) return Boolean.FALSE;
for (Object name: obj.getAllIds()) {
Object configurable = obj.getOwnPropertyDescriptor(cx, name).get("configurable");
if (Boolean.TRUE.equals(configurable))
return Boolean.FALSE;
}
return Boolean.TRUE;
}
case ConstructorId_isFrozen:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
if (obj.isExtensible()) return Boolean.FALSE;
for (Object name: obj.getAllIds()) {
ScriptableObject desc = obj.getOwnPropertyDescriptor(cx, name);
if (Boolean.TRUE.equals(desc.get("configurable")))
return Boolean.FALSE;
if (isDataDescriptor(desc) && Boolean.TRUE.equals(desc.get("writable")))
return Boolean.FALSE;
}
return Boolean.TRUE;
}
case ConstructorId_seal:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
for (Object name: obj.getAllIds()) {
ScriptableObject desc = obj.getOwnPropertyDescriptor(cx, name);
if (Boolean.TRUE.equals(desc.get("configurable"))) {
desc.put("configurable", desc, Boolean.FALSE);
obj.defineOwnProperty(cx, name, desc, false);
}
}
obj.preventExtensions();
return obj;
}
case ConstructorId_freeze:
{
Object arg = args.length < 1 ? Undefined.instance : args[0];
ScriptableObject obj = ensureScriptableObject(arg);
for (Object name: obj.getAllIds()) {
ScriptableObject desc = obj.getOwnPropertyDescriptor(cx, name);
if (isDataDescriptor(desc) && Boolean.TRUE.equals(desc.get("writable")))
desc.put("writable", desc, Boolean.FALSE);
if (Boolean.TRUE.equals(desc.get("configurable")))
desc.put("configurable", desc, Boolean.FALSE);
obj.defineOwnProperty(cx, name, desc, false);
}
obj.preventExtensions();
return obj;
}
default:
throw new IllegalArgumentException(String.valueOf(id));
}
}
// methods implementing java.util.Map
public boolean containsKey(Object key) {
if (key instanceof String) {
return has((String) key, this);
} else if (key instanceof Number) {
return has(((Number) key).intValue(), this);
}
return false;
}
public boolean containsValue(Object value) {
for (Object obj : values()) {
if (value == obj ||
value != null && value.equals(obj)) {
return true;
}
}
return false;
}
public Object remove(Object key) {
Object value = get(key);
if (key instanceof String) {
delete((String) key);
} else if (key instanceof Number) {
delete(((Number) key).intValue());
}
return value;
}
public Set<Object> keySet() {
return new KeySet();
}
public Collection<Object> values() {
return new ValueCollection();
}
public Set<Map.Entry<Object, Object>> entrySet() {
return new EntrySet();
}
public Object put(Object key, Object value) {
throw new UnsupportedOperationException();
}
public void putAll(Map m) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
class EntrySet extends AbstractSet<Entry<Object, Object>> {
@Override
public Iterator<Entry<Object, Object>> iterator() {
return new Iterator<Map.Entry<Object, Object>>() {
Object[] ids = getIds();
Object key = null;
int index = 0;
public boolean hasNext() {
return index < ids.length;
}
public Map.Entry<Object, Object> next() {
final Object ekey = key = ids[index++];
final Object value = get(key);
return new Map.Entry<Object, Object>() {
public Object getKey() {
return ekey;
}
public Object getValue() {
return value;
}
public Object setValue(Object value) {
throw new UnsupportedOperationException();
}
@Override
public boolean equals(Object other) {
if (!(other instanceof Map.Entry)) {
return false;
}
Map.Entry<?, ?> e = (Map.Entry<?, ?>) other;
return (ekey == null ? e.getKey() == null : ekey.equals(e.getKey()))
&& (value == null ? e.getValue() == null : value.equals(e.getValue()));
}
@Override
public int hashCode() {
return (ekey == null ? 0 : ekey.hashCode()) ^
(value == null ? 0 : value.hashCode());
}
@Override
public String toString() {
return ekey + "=" + value;
}
};
}
public void remove() {
if (key == null) {
throw new IllegalStateException();
}
NativeObject.this.remove(key);
key = null;
}
};
}
@Override
public int size() {
return NativeObject.this.size();
}
}
class KeySet extends AbstractSet<Object> {
@Override
public boolean contains(Object key) {
return containsKey(key);
}
@Override
public Iterator<Object> iterator() {
return new Iterator<Object>() {
Object[] ids = getIds();
Object key;
int index = 0;
public boolean hasNext() {
return index < ids.length;
}
public Object next() {
try {
return (key = ids[index++]);
} catch(ArrayIndexOutOfBoundsException e) {
key = null;
throw new NoSuchElementException();
}
}
public void remove() {
if (key == null) {
throw new IllegalStateException();
}
NativeObject.this.remove(key);
key = null;
}
};
}
@Override
public int size() {
return NativeObject.this.size();
}
}
class ValueCollection extends AbstractCollection<Object> {
@Override
public Iterator<Object> iterator() {
return new Iterator<Object>() {
Object[] ids = getIds();
Object key;
int index = 0;
public boolean hasNext() {
return index < ids.length;
}
public Object next() {
return get((key = ids[index++]));
}
public void remove() {
if (key == null) {
throw new IllegalStateException();
}
NativeObject.this.remove(key);
key = null;
}
};
}
@Override
public int size() {
return NativeObject.this.size();
}
}
// #string_id_map#
@Override
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
ConstructorId_getPrototypeOf = -1,
ConstructorId_keys = -2,
ConstructorId_getOwnPropertyNames = -3,
ConstructorId_getOwnPropertyDescriptor = -4,
ConstructorId_defineProperty = -5,
ConstructorId_isExtensible = -6,
ConstructorId_preventExtensions = -7,
ConstructorId_defineProperties= -8,
ConstructorId_create = -9,
ConstructorId_isSealed = -10,
ConstructorId_isFrozen = -11,
ConstructorId_seal = -12,
ConstructorId_freeze = -13,
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#
}