Bio::Index::AbstractSeq - base class for AbstractSeq


  # Make a new sequence file indexing package

  package MyShinyNewIndexer;

  use base qw(Bio::Index::AbstractSeq);

  # Now provide the necessary methods...


Provides a common base class for multiple sequence files built using the Bio::Index::Abstract system, and provides a Bio::DB::SeqI interface.


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AUTHOR - Ewan Birney



The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _


Bio::Index::Abstract, which provides dbm indexing for flat files of any type, containing sequence or not. Bio::Index::AbstractSeq inherits from Bio::Index::Abstract


 Title   : _file_format
 Usage   : $self->_file_format
 Function: Derived classes should override this
           method (it throws an exception here)
           to give the file format of the files used
 Example :
 Returns : 
 Args    :


  Title   : fetch
  Usage   : $index->fetch( $id )
  Function: Returns a Bio::Seq object from the index
  Example : $seq = $index->fetch( 'dJ67B12' )
  Returns : Bio::Seq object
  Args    : ID


  Title   : _get_SeqIO_object
  Usage   : $index->_get_SeqIO_object( $file )
  Function: Returns a Bio::SeqIO object for the file
  Example : $seq = $index->_get_SeqIO_object( 0 )
  Returns : Bio::SeqIO object
  Args    : File number (an integer)


 Title   : get_Seq_by_id
 Usage   : $seq = $db->get_Seq_by_id()
 Function: retrieves a sequence object, identically to
           ->fetch, but here behaving as a Bio::DB::BioSeqI
 Returns : new Bio::Seq object
 Args    : string represents the id


 Title   : get_Seq_by_acc
 Usage   : $seq = $db->get_Seq_by_acc()
 Function: retrieves a sequence object, identically to
           ->fetch, but here behaving as a Bio::DB::BioSeqI
 Returns : new Bio::Seq object
 Args    : string represents the accession number


 Title   : get_PrimarySeq_stream
 Usage   : $stream = get_PrimarySeq_stream
 Function: Makes a Bio::DB::SeqStreamI compliant object
           which provides a single method, next_primary_seq
 Returns : Bio::DB::SeqStreamI
 Args    : none


 Title   : get_all_primary_ids
 Usage   : @ids = $seqdb->get_all_primary_ids()
 Function: gives an array of all the primary_ids of the 
           sequence objects in the database. These
           maybe ids (display style) or accession numbers
           or something else completely different - they
           *are not* meaningful outside of this database
 Example :
 Returns : an array of strings
 Args    : none


 Title   : get_Seq_by_primary_id
 Usage   : $seq = $db->get_Seq_by_primary_id($primary_id_string);
 Function: Gets a Bio::Seq object by the primary id. The primary
           id in these cases has to come from $db->get_all_primary_ids.
           There is no other way to get (or guess) the primary_ids
           in a database.

           The other possibility is to get Bio::PrimarySeqI objects
           via the get_PrimarySeq_stream and the primary_id field
           on these objects are specified as the ids to use here.
 Returns : A Bio::Seq object
 Args    : primary id (as a string)
 Throws  : "acc does not exist" exception