/* -*- 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) 1997-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Igor Bukanov
* Bob Jervis
* Roger Lawrence
*
* 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;
import org.mozilla.javascript.debug.DebuggableScript;
final class InterpretedFunction extends NativeFunction implements Script
{
static final long serialVersionUID = 541475680333911468L;
InterpreterData idata;
SecurityController securityController;
Object securityDomain;
Scriptable[] functionRegExps;
private InterpretedFunction(InterpreterData idata,
Object staticSecurityDomain)
{
this.idata = idata;
// Always get Context from the current thread to
// avoid security breaches via passing mangled Context instances
// with bogus SecurityController
Context cx = Context.getContext();
SecurityController sc = cx.getSecurityController();
Object dynamicDomain;
if (sc != null) {
dynamicDomain = sc.getDynamicSecurityDomain(staticSecurityDomain);
} else {
if (staticSecurityDomain != null) {
throw new IllegalArgumentException();
}
dynamicDomain = null;
}
this.securityController = sc;
this.securityDomain = dynamicDomain;
}
private InterpretedFunction(InterpretedFunction parent, int index)
{
this.idata = parent.idata.itsNestedFunctions[index];
this.securityController = parent.securityController;
this.securityDomain = parent.securityDomain;
}
/**
* Create script from compiled bytecode.
*/
static InterpretedFunction createScript(InterpreterData idata,
Object staticSecurityDomain)
{
InterpretedFunction f;
f = new InterpretedFunction(idata, staticSecurityDomain);
return f;
}
/**
* Create function compiled from Function(...) constructor.
*/
static InterpretedFunction createFunction(Context cx,Scriptable scope,
InterpreterData idata,
Object staticSecurityDomain)
{
InterpretedFunction f;
f = new InterpretedFunction(idata, staticSecurityDomain);
f.initInterpretedFunction(cx, scope);
return f;
}
/**
* Create function embedded in script or another function.
*/
static InterpretedFunction createFunction(Context cx, Scriptable scope,
InterpretedFunction parent,
int index)
{
InterpretedFunction f = new InterpretedFunction(parent, index);
f.initInterpretedFunction(cx, scope);
return f;
}
Scriptable[] createRegExpWraps(Context cx, Scriptable scope)
{
if (idata.itsRegExpLiterals == null) Kit.codeBug();
RegExpProxy rep = ScriptRuntime.checkRegExpProxy(cx);
int N = idata.itsRegExpLiterals.length;
Scriptable[] array = new Scriptable[N];
for (int i = 0; i != N; ++i) {
array[i] = rep.wrapRegExp(cx, scope, idata.itsRegExpLiterals[i]);
}
return array;
}
private void initInterpretedFunction(Context cx, Scriptable scope)
{
initScriptFunction(cx, scope);
if (idata.itsRegExpLiterals != null) {
functionRegExps = createRegExpWraps(cx, scope);
}
}
@Override
public String getFunctionName()
{
return (idata.itsName == null) ? "" : idata.itsName;
}
/**
* Calls the function.
* @param cx the current context
* @param scope the scope used for the call
* @param thisObj the value of "this"
* @param args function arguments. Must not be null. You can use
* {@link ScriptRuntime#emptyArgs} to pass empty arguments.
* @return the result of the function call.
*/
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
{
if (!ScriptRuntime.hasTopCall(cx)) {
return ScriptRuntime.doTopCall(this, cx, scope, thisObj, args);
}
return Interpreter.interpret(this, cx, scope, thisObj, args);
}
public Object exec(Context cx, Scriptable scope)
{
if (!isScript()) {
// Can only be applied to scripts
throw new IllegalStateException();
}
if (!ScriptRuntime.hasTopCall(cx)) {
// It will go through "call" path. but they are equivalent
return ScriptRuntime.doTopCall(
this, cx, scope, scope, ScriptRuntime.emptyArgs);
}
return Interpreter.interpret(
this, cx, scope, scope, ScriptRuntime.emptyArgs);
}
public boolean isScript() {
return idata.itsFunctionType == 0;
}
@Override
public String getEncodedSource()
{
return Interpreter.getEncodedSource(idata);
}
@Override
public DebuggableScript getDebuggableView()
{
return idata;
}
@Override
public Object resumeGenerator(Context cx, Scriptable scope, int operation,
Object state, Object value)
{
return Interpreter.resumeGenerator(cx, scope, operation, state, value);
}
@Override
protected int getLanguageVersion()
{
return idata.languageVersion;
}
@Override
protected int getParamCount()
{
return idata.argCount;
}
@Override
protected int getParamAndVarCount()
{
return idata.argNames.length;
}
@Override
protected String getParamOrVarName(int index)
{
return idata.argNames[index];
}
@Override
protected boolean getParamOrVarConst(int index)
{
return idata.argIsConst[index];
}
}