org.mozilla.javascript.IdFunctionObject Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of js Show documentation
Show all versions of js Show documentation
Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.
/* -*- 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):
* Igor Bukanov
*
* 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 ***** */
// API class
package org.mozilla.javascript;
public class IdFunctionObject extends BaseFunction
{
static final long serialVersionUID = -5332312783643935019L;
public IdFunctionObject(IdFunctionCall idcall, Object tag, int id, int arity)
{
if (arity < 0)
throw new IllegalArgumentException();
this.idcall = idcall;
this.tag = tag;
this.methodId = id;
this.arity = arity;
if (arity < 0) throw new IllegalArgumentException();
}
public IdFunctionObject(IdFunctionCall idcall, Object tag, int id,
String name, int arity, Scriptable scope)
{
super(scope, null);
if (arity < 0)
throw new IllegalArgumentException();
if (name == null)
throw new IllegalArgumentException();
this.idcall = idcall;
this.tag = tag;
this.methodId = id;
this.arity = arity;
this.functionName = name;
}
public void initFunction(String name, Scriptable scope)
{
if (name == null) throw new IllegalArgumentException();
if (scope == null) throw new IllegalArgumentException();
this.functionName = name;
setParentScope(scope);
}
public final boolean hasTag(Object tag)
{
return this.tag == tag;
}
public final int methodId()
{
return methodId;
}
public final void markAsConstructor(Scriptable prototypeProperty)
{
useCallAsConstructor = true;
setImmunePrototypeProperty(prototypeProperty);
}
public final void addAsProperty(Scriptable target)
{
ScriptableObject.defineProperty(target, functionName, this,
ScriptableObject.DONTENUM);
}
public void exportAsScopeProperty()
{
addAsProperty(getParentScope());
}
public Scriptable getPrototype()
{
// Lazy initialization of prototype: for native functions this
// may not be called at all
Scriptable proto = super.getPrototype();
if (proto == null) {
proto = getFunctionPrototype(getParentScope());
setPrototype(proto);
}
return proto;
}
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
{
return idcall.execIdCall(this, cx, scope, thisObj, args);
}
public Scriptable createObject(Context cx, Scriptable scope)
{
if (useCallAsConstructor) {
return null;
}
// Throw error if not explicitly coded to be used as constructor,
// to satisfy ECMAScript standard (see bugzilla 202019).
// To follow current (2003-05-01) SpiderMonkey behavior, change it to:
// return super.createObject(cx, scope);
throw ScriptRuntime.typeError1("msg.not.ctor", functionName);
}
String decompile(int indent, int flags)
{
StringBuffer sb = new StringBuffer();
boolean justbody = (0 != (flags & Decompiler.ONLY_BODY_FLAG));
if (!justbody) {
sb.append("function ");
sb.append(getFunctionName());
sb.append("() { ");
}
sb.append("[native code for ");
if (idcall instanceof Scriptable) {
Scriptable sobj = (Scriptable)idcall;
sb.append(sobj.getClassName());
sb.append('.');
}
sb.append(getFunctionName());
sb.append(", arity=");
sb.append(getArity());
sb.append(justbody ? "]\n" : "] }\n");
return sb.toString();
}
public int getArity()
{
return arity;
}
public int getLength() { return getArity(); }
public String getFunctionName()
{
return (functionName == null) ? "" : functionName;
}
public final RuntimeException unknown()
{
// It is program error to call id-like methods for unknown function
return new IllegalArgumentException(
"BAD FUNCTION ID="+methodId+" MASTER="+idcall);
}
private final IdFunctionCall idcall;
private final Object tag;
private final int methodId;
private int arity;
private boolean useCallAsConstructor;
private String functionName;
}