/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Netscape are * Copyright (C) 1997-1999 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): * Norris Boyd * Igor Bukanov * Mike McCabe * * Alternatively, the contents of this file may be used under the * terms of the GNU Public License (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 NPL, indicate your decision by * deleting the provisions above and replace 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 NPL or the GPL. */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;          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);          default: throw new IllegalArgumentException(String.valueOf(id));        }    }// #string_id_map#    protected int findPrototypeId(String s)    {        int id;// #generated# Last update: 2003-11-11 01:51:40 CET        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 20: X="propertyIsEnumerable";id=Id_propertyIsEnumerable; break L;            }            if (X!=null && X!=s && !X.equals(s)) id = 0;        }// #/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,        MAX_PROTOTYPE_ID         = 8;// #/string_id_map#}