[Biojava-l] ProfileHMM Serialization Problem
Todd Riley
toddri at eden.rutgers.edu
Fri Mar 17 02:33:05 UTC 2006
Hello all,
I am having a problem with serialized ProfileHMM objects. I can read in
one serialized ProfileHMM object, but never more than one (I can't even
read in the same serialized object again.) It appears that the problem
lies with the AlphabetManager. Maybe a clash with alphabet names and/or
indexes? I looked in the archives and found the problem seemed to exist
back in Oct of 2002. Has this ever been addressed? Any help here would
be greatly appreciated.
Thanks,
Todd
RE: [Biojava-l] Re: Biojava-l digest, Vol 1 #776 - 5 msgs
Schreiber, Mark
Tue, 08 Oct 2002 13:11:33 -0700
Yup,
It needs fixing, serialization and BioJava just don't seem to play that
well :(
The question is what kind of API. The attractive part about
serialization is that when it works you get back what you started with.
You can also do RMI. The downside of the XML model is you don't get back
what you had before, you get back a MarkovModel, all of your custom
designed methods etc are lost.
Two ways I can see to get around this. One right a wrapper class that
makes your custom model and the thing returned by the XMLMarkovModel
look the same (look like the same interface generally). The other option
is to mimic something like JAXB (not JAXB though as it won't cope well
with BioJava flyweight symbols and alphabets). Somewhere the class name
is stored in the XML and through the wonders of introspection things are
returned to how they were. This generally requires the class to be
designed as a valid bean, or at least point to a nice FactoryClass or
something.
Ultimately this would be good for all of BioJava. I know people hate the
idea of another XML format but I think that there really isn't one that
represents what we are trying to do here. You could also write XSLT to
transform into XML flavours that aren't as interested in gory details
such as classnames etc which are needed for serialization.
Just my $0.02
- Mark
> -----Original Message-----
> From: Matthew Pocock [mailto:[EMAIL PROTECTED] <mailto:%5BEMAIL%20PROTECTED%5D>]
> Sent: Wednesday, 9 October 2002 7:08 a.m.
> To: Lachlan Coin; [EMAIL PROTECTED]
> Subject: Re: [Biojava-l] Re: Biojava-l digest, Vol 1 #776 - 5 msgs
>
>
> Hi,
>
> HMM serialization (or persistance) seems to be an
> ongoing problem for people. We (OK - I) wrote this
> code a long time ago, back in the dark ages when I
> didn't know much about programming. Does anyone want
> to fix this mess once and for all, and write a HMM
> persistance API? It sounds like that would be a realy
> helpfull thing to have.
>
> Matthew
>
> --- Lachlan Coin <[EMAIL PROTECTED]> wrote: > Hi
> >
> > Having made a mistake in serialising HMMs before -
> > are you writing your
> > serialised object at several points in the code?
> > Unless you write all of
> > the models at the same point, they will not work
> > when you read them back
> > in.
> >
> > Cheers,
> >
> > Lachlan
> >
> > >
> > > Message: 1
> > > Subject: RE: [Biojava-l] Create DP object from
> > profileHMM class file
> > > Date: Tue, 8 Oct 2002 08:53:41 +1300
> > > From: "Schreiber, Mark"
> > <[EMAIL PROTECTED]>
> > > To: "Tisanai" <[EMAIL PROTECTED]>,
> > <[EMAIL PROTECTED]>
> > >
> > > Hi -
> > >
> > > The error is coming from the 64th line of your
> > program (at
> > > T_Zscore.main(T_Zscore.java:64))
> > >
> > > I can see two places that the error might be
> > coming from but I need to
> > > know which line is the 64th line of the program.
> > >
> > > Is it: ProfileHMM model = (ProfileHMM)
> > ois_md.readObject();
> > >
> > > Or is it: dp[i] =
> > DPFactory.DEFAULT.createDP(model);
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Tisanai
> > [mailto:[EMAIL PROTECTED] <mailto:%5BEMAIL%20PROTECTED%5D>]
> > > > Sent: Tuesday, 8 October 2002 2:40 a.m.
> > > > To: [EMAIL PROTECTED]
> > > > Subject: [Biojava-l] Create DP object from
> > profileHMM class file
> > > >
> > > >
> > > > Hi
> > > >
> > > > By this code I would like to create DP object
> > from several
> > > > phmm file.
> > > >
> > > > for(int
> > i=0;i<md_out_lst.align.length;i++){
> > > > String model_out_name =
> > md_out_lst.align[i];
> > > > File md_file = new File(model_out_name);
> > > >
> > > > FileInputStream fis_md = new
> > FileInputStream(md_file);
> > > > ObjectInputStream ois_md = new
> > ObjectInputStream(fis_md);
> > > > ProfileHMM model = (ProfileHMM)
> > ois_md.readObject();
> > > > ois_md.close();
> > > > dp[i] =
> > DPFactory.DEFAULT.createDP(model);
> > > > }
> > > >
> > > > I found that it always stuck at the second file (i=2). If there is only one file in my list this code will
> > work fine. But if there is more than one file in the list when it try to
> > > > create the second dp object (dp[1]). This kind of error will shown out:
> > > >
> > > > org.biojava.bio.BioError: State d-15
> > is known in
> > > > states but is not listed in the transFrom table
> > > > at
> > > >
> >
> org.biojava.bio.dp.SimpleMarkovModel.transitionsFrom(SimpleMar
> > > > kovModel.java:227)
> > > > at
> > > >
> >
> org.biojava.bio.dp.DP$HMMOrderByTransition.transitionsTo(DP.java:599)
> > > > at
> > > >
> >
> org.biojava.bio.dp.DP$HMMOrderByTransition.compare(DP.java:586)
> > > > at org.biojava.bio.dp.DP.stateList(DP.java:123)
> > > > at org.biojava.bio.dp.DP.update(DP.java:353)
> > > > at
> >
> org.biojava.bio.dp.onehead.SingleDP.update(SingleDP.java:49)
> > > > at org.biojava.bio.dp.DP.<init>(DP.java:377)
> > > > at
> >
> org.biojava.bio.dp.onehead.SingleDP.<init>(SingleDP.java:41)
> > > > at
> > > >
> >
> org.biojava.bio.dp.DPFactory$DefaultFactory.createDP(DPFactory
> > > .java:53)
> > > > at T_Zscore.main(T_Zscore.java:64)
> > > >
> > > > How can I fix my code?
> > > >
> > > > Thank
> > > > Tisanai
> > > >
> > > > _______________________________________________
> > > > Biojava-l mailing list - [EMAIL PROTECTED]
> > > > http://biojava.org/mailman/listinfo/biojava-l
> > > >
> > >
> >
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[Biojava-l] Re: Biojava-l digest, Vol 1 #776 - 5 msgs
<http://www.mail-archive.com/biojava-l@biojava.org/msg02132.html>
Lachlan Coin
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