Re: [Jikesrvm-researchers] Problem geting static field value

[Fu, C. <ch...@cs...>]

Thanks for the prompt reply, the ObjectStreamField is not in the bootImage,
while HashMap is in.
I'm using BaseBaseSemispace. How to get ObjectStreamField included in the
bootImage? I don't want the configuration of Full or Fast for it takes too
long to compile.

Thanks!
----- Original Message -----
From: "Igor Pechtchanski" <ig...@wa...>
To: <jik...@ww...>
Sent: Tuesday, August 13, 2002 7:25 PM
Subject: Re: [Jikesrvm-researchers] Problem geting static field value


> Did you put the HashMap object in the bootimage?  If so, you should have
> made "[Ljava/io/ObjectSteamField;" a primordial class as well.
> Build your bootimage with the "-trace" option and search the output for
> "ObjectStreamField".  If you see something like "not in bootimage, writing
> null", my guess was right.
> Igor
>
> On Tue, 13 Aug 2002, Fu, Chen wrote:
>
> > Hi,
> > Thanks very much for David to answer my questions.
> >
> > I got another problem here, the following java program is trying to get
the
> > value of java.util.HashMap.serialPersistentFields, which should be an
array
> > of ObjectStreamField. While actually it returns null.
> > I'm working on it while would anyone please give me a hand on it.
> >
> > Thanks!
> >
> > import java.io.*;
> > import java.lang.reflect.*;
> > import java.net.*;
> > import java.util.*;
> > file://import JSX.*;
> >
> > public class FieldTest {
> >
> >   static public HashMap table;
> >
> >   public static void main(String arg[])
> >     throws IOException{
> >     table = new HashMap();
> >     table.put("coda", "3501");
> >     table.put("athena", "3502");
> >
> >
> >     try{
> >       Field f =
table.getClass().getDeclaredField("serialPersistentFields");
> >       f.setAccessible(true);
> >       Object[] fields = (Object [])f.get(null);
> >       if (fields == null)
> >         System.err.println("Wrong!");
> >     } catch (Exception e) {
> >       e.printStackTrace();
> >     }
> >   }
> > }
> >
> >
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> >
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> >
>
> --
> Igor Pechtchanski               With Perl you can manipulate text,
interact with
> IBM T.J.Watson Research Center  programs, talk over networks, drive Web
pages,
> ig...@wa...             perform arbitrary precision arithmetic,
and
> (914)784-6162                   write programs that look like Snoopy
swearing.
>
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