/** * Make a script object mirror on given object if needed. * * @param obj object to be wrapped/converted * @param homeGlobal global to which this object belongs. * @param jsonCompatible if true, the created wrapper will implement the Java {@code List} interface if * {@code obj} is a JavaScript {@code Array} object. Arrays retrieved through its properties (transitively) * will also implement the list interface. * @return wrapped/converted object */ private static Object wrap(final Object obj, final Object homeGlobal, final boolean jsonCompatible) { if(obj instanceof ScriptObject) { if (!(homeGlobal instanceof Global)) { return obj; } final ScriptObject sobj = (ScriptObject)obj; final Global global = (Global)homeGlobal; final ScriptObjectMirror mirror = new ScriptObjectMirror(sobj, global, jsonCompatible); if (jsonCompatible && sobj.isArray()) { return new JSONListAdapter(mirror, global); } return mirror; } else if(obj instanceof ConsString) { return obj.toString(); } else if (jsonCompatible && obj instanceof ScriptObjectMirror) { // Since choosing JSON compatible representation is an explicit decision on user's part, if we're asked to // wrap a mirror that was not JSON compatible, explicitly create its compatible counterpart following the // principle of least surprise. return ((ScriptObjectMirror)obj).asJSONCompatible(); } return obj; }
/** * Make a script object mirror on given object if needed. Also converts ConsString instances to Strings. * * @param obj object to be wrapped/converted * @param homeGlobal global to which this object belongs. Not used for ConsStrings. * @param jsonCompatible if true, the created wrapper will implement the Java {@code List} interface if * {@code obj} is a JavaScript {@code Array} object. Arrays retrieved through its properties (transitively) * will also implement the list interface. * @return wrapped/converted object */ private static Object wrap(final Object obj, final Object homeGlobal, final boolean jsonCompatible) { if(obj instanceof ScriptObject) { if (!(homeGlobal instanceof Global)) { return obj; } final ScriptObject sobj = (ScriptObject)obj; final Global global = (Global)homeGlobal; final ScriptObjectMirror mirror = new ScriptObjectMirror(sobj, global, jsonCompatible); if (jsonCompatible && sobj.isArray()) { return new JSONListAdapter(mirror, global); } return mirror; } else if(obj instanceof ConsString) { return obj.toString(); } else if (jsonCompatible && obj instanceof ScriptObjectMirror) { // Since choosing JSON compatible representation is an explicit decision on user's part, if we're asked to // wrap a mirror that was not JSON compatible, explicitly create its compatible counterpart following the // principle of least surprise. return ((ScriptObjectMirror)obj).asJSONCompatible(); } return obj; }
/** * Unwrap a script object mirror if needed. * * @param obj object to be unwrapped * @param homeGlobal global to which this object belongs * @return unwrapped object */ public static Object unwrap(final Object obj, final Object homeGlobal) { if (obj instanceof ScriptObjectMirror) { final ScriptObjectMirror mirror = (ScriptObjectMirror)obj; return (mirror.global == homeGlobal)? mirror.sobj : obj; } else if (obj instanceof JSONListAdapter) { return ((JSONListAdapter)obj).unwrap(homeGlobal); } return obj; }
/** * When passed an {@link AbstractJSObject}, invokes its {@link #getDefaultValue(Class)} method. When passed any * other {@link JSObject}, it will obtain its {@code [[DefaultValue]]} method as per ECMAScript 5.1 section * 8.6.2. * * @param jsobj the {@link JSObject} whose {@code [[DefaultValue]]} is obtained. * @param hint the type hint. Should be either {@code null}, {@code Number.class} or {@code String.class}. * @return this object's default value. * @throws UnsupportedOperationException if the conversion can't be performed. The engine will convert this * exception into a JavaScript {@code TypeError}. */ public static Object getDefaultValue(final JSObject jsobj, final Class<?> hint) { if (jsobj instanceof AbstractJSObject) { return ((AbstractJSObject)jsobj).getDefaultValue(hint); } else if (jsobj instanceof JSONListAdapter) { return ((JSONListAdapter)jsobj).getDefaultValue(hint); } return DefaultValueImpl.getDefaultValue(jsobj, hint); }