[Biojava-l] unigene cluster ?

[shakiba jalal]

Hi everyone :
Can you use the UnigeneTools in order to access a unigene cluster from
Unigene on NCBI ?? OR is it used only for local unigene database ?
If you can, how would you make a UnigeneData Object using UnigeneTools?
with what url ? What if i don't know the cluster id, but i know the urn
for a gene ? How can i use the urn to get the Unigene cluster ?
I would really appreciate your help.
thank you

P.S- i keep getting this error message
Exception in thread "main" org.biojava.bio.BioException: No factory for
unigene url: http://www.ncbi.nlm.nih.gov/
nigene
        at
org.biojava.bio.program.unigene.UnigeneTools.findFactory(UnigeneTools.java:375)