Re: class to JavaClass file

Tue, 01 Apr 2003 18:39:22 -0800

Hi,
This is a part of my ClassLoader , at the end of this section I have result ( an instance of Class ) which gets bytecode of system classes, I want to convert this into JavaClass. "object" in your example is an instance of Class or shall I say object and result of same type ..


public synchronized Class loadClass(String className, boolean resolveIt)
        throws ClassNotFoundException {
       Class result;
       byte  classData[];
        JavaClass java_class;

System.out.println(" >>>>>> Load class : "+className);

       /* Check our local cache of classes */
       result = (Class)classes.get(className);
       if (result != null) {
           System.out.println("        >>>>>> returning cached result.");
           return result;
       }

       /* Check with the primordial class loader */
       try {
           result = super.findSystemClass(className);
// >> I WANT TO CONVERT THIS result TO JavaClass <<<<

       } catch (ClassNotFoundException e) {
           System.out.println("        >>>>>> Not a system class.");
       }



Thanks for your help , I really appreciate it

Regards
Gaurav Shankar





From: "Juozas Baliuka" <[EMAIL PROTECTED]>
Reply-To: "BCEL Users List" <[EMAIL PROTECTED]>
To: "BCEL Users List" <[EMAIL PROTECTED]>
Subject: Re: class to JavaClass file
Date: Tue, 1 Apr 2003 08:11:26 +0200


You can load class file as resource with system classloader, but you can not
to define it twice in the same classloader:

 JavaClass jclass =  new
ClassParser(Object.class.getResource(Object.class.getName().replace('.','/')
+ ".class")),Object.class.getName());


> What I am trying to do is change in constant pool of every class my
> application loads (not all but that also includes some library classes )
for
> that im trying to change instance of Class that findSystemClass() returns
> into that of JavaClass so that I can change in the constant pool and then
> use defineClass on it. ClassParser converts DataInputStream into
JavaClass,
> how can I make it to change Class into JavaClass.
>
> Thanks
> Gaurav Shankar
> CS Deptt , Rutgers University
>
>
>
>
>
>
> >From: "Juozas Baliuka" <[EMAIL PROTECTED]>
> >Reply-To: "BCEL Users List" <[EMAIL PROTECTED]>
> >To: "BCEL Users List" <[EMAIL PROTECTED]>
> >Subject: Re: class to JavaClass file
> >Date: Mon, 31 Mar 2003 17:25:44 +0200
> >
> >
> >Sometimes it can work on system classes too,
> >classloader can not define system class, but you can try depricated
> >"defineClass(byte[] b, int pos, int len)" method, I am not sure this will
> >work for classes like Object or String,
> >and it is no way to define classes for arrays.
> >
> >
> > > Hi,
> > > Im trying my class loader with BCEL, Im looking Constant pool of each
> >class
> > > used by my application, even system classes, for that I need to
convert
> > > class file ( which I get as result of findSystemClass() ) and convert
it
> >to
> > > JavaClass file.
> > >
> > >
> > > regards
> > >
> > > Gaurav Shankar
> > >
> > > _________________________________________________________________
> > >
> > >
> > >
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> > >
> >
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>
>
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>
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