/* -*- 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 * Roger Lawrence * 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;/** * The JavaScript Script object. * * Note that the C version of the engine uses XDR as the format used * by freeze and thaw. Since this depends on the internal format of * structures in the C runtime, we cannot duplicate it. * * Since we cannot replace 'this' as a result of the compile method, * will forward requests to execute to the nonnull 'script' field. * * @since 1.3 * @author Norris Boyd */class NativeScript extends BaseFunction{    static final long serialVersionUID = -6795101161980121700L;    private static final Object SCRIPT_TAG = new Object();    static void init(Scriptable scope, boolean sealed)    {        NativeScript obj = new NativeScript(null);        obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);    }    private NativeScript(Script script)    {        this.script = script;    }    /**     * Returns the name of this JavaScript class, "Script".     */    public String getClassName()    {        return "Script";    }    public Object call(Context cx, Scriptable scope, Scriptable thisObj,                       Object[] args)    {        if (script != null) {            return script.exec(cx, scope);        }        return Undefined.instance;    }    public Scriptable construct(Context cx, Scriptable scope, Object[] args)    {        throw Context.reportRuntimeError0("msg.script.is.not.constructor");    }    public int getLength()    {        return 0;    }    public int getArity()    {        return 0;    }    String decompile(int indent, int flags)    {        if (script instanceof NativeFunction) {            return ((NativeFunction)script).decompile(indent, flags);        }        return super.decompile(indent, flags);    }    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_exec:        arity=0; s="exec";        break;          case Id_compile:     arity=1; s="compile";     break;          default: throw new IllegalArgumentException(String.valueOf(id));        }        initPrototypeMethod(SCRIPT_TAG, id, s, arity);    }    public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,                             Scriptable thisObj, Object[] args)    {        if (!f.hasTag(SCRIPT_TAG)) {            return super.execIdCall(f, cx, scope, thisObj, args);        }        int id = f.methodId();        switch (id) {          case Id_constructor: {            String source = (args.length == 0)                            ? ""                            : ScriptRuntime.toString(args[0]);            Script script = compile(cx, source);            NativeScript nscript = new NativeScript(script);            ScriptRuntime.setObjectProtoAndParent(nscript, scope);            return nscript;          }          case Id_toString: {            NativeScript real = realThis(thisObj, f);            Script realScript = real.script;            if (realScript == null) { return ""; }            return cx.decompileScript(realScript, 0);          }          case Id_exec: {            throw Context.reportRuntimeError1(                "msg.cant.call.indirect", "exec");          }          case Id_compile: {            NativeScript real = realThis(thisObj, f);            String source = ScriptRuntime.toString(args, 0);            real.script = compile(cx, source);            return real;          }        }        throw new IllegalArgumentException(String.valueOf(id));    }    private static NativeScript realThis(Scriptable thisObj, IdFunctionObject f)    {        if (!(thisObj instanceof NativeScript))            throw incompatibleCallError(f);        return (NativeScript)thisObj;    }    private static Script compile(Context cx, String source)    {        int[] linep = { 0 };        String filename = Context.getSourcePositionFromStack(linep);        if (filename == null) {            filename = "<Script object>";            linep[0] = 1;        }        ErrorReporter reporter;        reporter = DefaultErrorReporter.forEval(cx.getErrorReporter());        return cx.compileString(source, null, reporter, filename,                                linep[0], null);    }// #string_id_map#    protected int findPrototypeId(String s)    {        int id;// #generated# Last update: 2001-05-23 13:25:01 GMT+02:00        L0: { id = 0; String X = null;            L: switch (s.length()) {            case 4: X="exec";id=Id_exec; break L;            case 7: X="compile";id=Id_compile; break L;            case 8: X="toString";id=Id_toString; break L;            case 11: X="constructor";id=Id_constructor; 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_compile        = 3,        Id_exec           = 4,        MAX_PROTOTYPE_ID  = 4;// #/string_id_map#    private Script script;}