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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. 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 General Public License Version 2 or later (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
* MPL, indicate your decision by deleting the provisions above and replacing
* 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 MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
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: 2007-05-09 08:16:01 EDT
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;
break L0;
}
// #/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;
}
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