Source Code Cross Referenced for NativeObject.java in  » EJB-Server-resin-3.1.5 » ecmascript » com » caucho » es » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » ecmascript » com.caucho.es 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.es;
030:
031:        import com.caucho.util.IntMap;
032:
033:        /**
034:         * JavaScript object
035:         */
036:        class NativeObject extends Native {
037:            static final int TO_OBJECT = 2;
038:            static final int TO_STRING = TO_OBJECT + 1;
039:            static final int VALUE_OF = TO_STRING + 1;
040:            static final int TO_SOURCE = VALUE_OF + 1;
041:            static final int WATCH = TO_SOURCE + 1;
042:            static final int UNWATCH = WATCH + 1;
043:
044:            /**
045:             * Create a new object based on a prototype
046:             */
047:            private NativeObject(String name, int n, int len) {
048:                super (name, len);
049:
050:                this .n = n;
051:            }
052:
053:            /**
054:             * Creates the native Object object
055:             */
056:            static ESObject create(Global resin) {
057:                Native nativeObj = new NativeObject("Object", TO_OBJECT, 1);
058:                resin.objProto = new ESObject("Object", esBase);
059:
060:                NativeWrapper obj = new NativeWrapper(resin, nativeObj,
061:                        resin.objProto, ESThunk.OBJ_THUNK);
062:
063:                put(resin.objProto, "toString", TO_STRING, 0, DONT_ENUM);
064:                put(resin.objProto, "valueOf", VALUE_OF, 0, DONT_ENUM);
065:
066:                put(resin.objProto, "toSource", TO_SOURCE, 0, DONT_ENUM);
067:                put(resin.objProto, "watch", WATCH, 0, DONT_ENUM);
068:                put(resin.objProto, "unwatch", UNWATCH, 0, DONT_ENUM);
069:
070:                resin.objProto.setClean();
071:                obj.setClean();
072:
073:                return obj;
074:            }
075:
076:            private static void put(ESObject obj, String name, int n, int len,
077:                    int flags) {
078:                ESId id = ESId.intern(name);
079:                NativeObject fun = new NativeObject(name, n, len);
080:
081:                try {
082:                    obj.put(id, fun, flags);
083:                } catch (Exception e) {
084:                    throw new RuntimeException();
085:                }
086:            }
087:
088:            public ESBase call(Call eval, int length) throws Throwable {
089:                switch (n) {
090:                // Object prototype stuff
091:                case TO_STRING:
092:                    // XXX: Is this correct?  Test.
093:                    ESBase arg = eval.getArg(-1);
094:
095:                    if (arg instanceof  ESObject)
096:                        return toString((ESObject) arg);
097:                    else
098:                        return toString(arg.toObject());
099:
100:                case VALUE_OF:
101:                    arg = eval.getArg(-1);
102:                    if (arg instanceof  ESWrapper) {
103:                        ESWrapper obj = (ESWrapper) arg;
104:
105:                        if (obj.value instanceof  ESBase)
106:                            return (ESBase) obj.value;
107:                        else
108:                            return obj.toStr();
109:                    }
110:                    return arg;
111:
112:                case TO_OBJECT:
113:                    if (length <= 0 || (arg = eval.getArg(0)) == ESBase.esNull
114:                            || arg == ESBase.esUndefined
115:                            || arg == ESBase.esEmpty)
116:                        return Global.getGlobalProto().createObject();
117:
118:                    else if (length > 1)
119:                        return createObjectLiteral(eval, length);
120:
121:                    else
122:                        return arg.toObject();
123:
124:                case TO_SOURCE:
125:                    arg = eval.getThis();
126:                    Global.getGlobalProto().clearMark();
127:                    IntMap map = new IntMap();
128:
129:                    arg.toSource(map, true);
130:                    return arg.toSource(map, false);
131:
132:                case WATCH:
133:                    if (length < 2)
134:                        throw new ESException("watch expects two arguments");
135:
136:                    ESBase obj = eval.getThis();
137:
138:                    ESString key = eval.getArg(0).toStr();
139:                    ESBase fun = eval.getArg(1);
140:                    if (!(fun instanceof  ESClosure) && !(fun instanceof  Native))
141:                        throw new ESException("watch requires function");
142:
143:                    ((ESObject) obj).watch(key, fun);
144:
145:                    return esUndefined;
146:
147:                case UNWATCH:
148:                    if (length < 1)
149:                        throw new ESException("unwatch expects one argument");
150:
151:                    obj = eval.getThis();
152:
153:                    key = eval.getArg(0).toStr();
154:
155:                    ((ESObject) obj).unwatch(key);
156:
157:                    return esUndefined;
158:
159:                default:
160:                    throw new RuntimeException("Unknown object function");
161:                }
162:            }
163:
164:            public ESBase construct(Call eval, int length) throws Throwable {
165:                if (n != TO_OBJECT)
166:                    return super .construct(eval, length);
167:
168:                if (length == 0 || eval.getArg(0) == esNull
169:                        || eval.getArg(0) == esUndefined
170:                        || eval.getArg(0) == esEmpty) {
171:                    return Global.getGlobalProto().createObject();
172:                }
173:                if (length > 1) {
174:                    return createObjectLiteral(eval, length);
175:                }
176:
177:                return eval.getArg(0).toObject();
178:            }
179:
180:            private ESBase createObjectLiteral(Call call, int length)
181:                    throws Throwable {
182:                ESObject obj = Global.getGlobalProto().createObject();
183:
184:                for (int i = 0; i + 1 < length; i += 2) {
185:                    ESString key = call.getArg(i, length).toStr();
186:                    ESBase value = call.getArg(i + 1, length);
187:
188:                    obj.setProperty(key, value);
189:                }
190:
191:                return obj;
192:            }
193:
194:            static public ESBase toString(ESObject obj) throws ESException {
195:                return ESString.create("[object " + obj.getClassName() + "]");
196:            }
197:        }
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