/ 
BioPerl-1.007000
River stage two • 60 direct dependents • 65 total dependents
/ Bio::Ontology::OntologyStore

NAME

Bio::Ontology::OntologyStore - A repository of ontologies

SYNOPSIS

#----------
#SCENARIO 1
#----------

#make an ontology object manually. via OntologyIO
my $io = Bio::OntologyIO->new(
                              #params to fetch Cell Ontology here
                             );
my $cell_ontology = $io->next_ontology;

#this is a singleton that caches the fact that you've created
#a 'Cell Ontology' intance...
my $store = Bio::Ontology::OntologyStore->get_instance();

#...and it can hand you back a copy of it at any time.
my $cell_ontology_copy = $store->get_ontology('Cell Ontology');


#----------
#SCENARIO 2
#----------

my $store = Bio::Ontology::OntologyStore->get_instance();
#this use case allows the construction of an ontology on
#demand just by supplying the name.
my $ontology = $store->get_ontology('Sequence Ontology');

DESCRIPTION

The primary purpose of this module is that of a singleton repository of Bio::Ontology::OntologyI instances from which an Ontology instance can be retrieved by name or identifier. This enables TermI implementations to return their corresponding OntologyI through using this singleton store instead of storing a direct reference to the Ontology object. The latter would almost inevitably lead to memory cycles, and would therefore potentially blow up an application.

FEEDBACK

Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the Bioperl mailing list. Your participation is much appreciated.

bioperl-l@bioperl.org                  - General discussion
http://bioperl.org/wiki/Mailing_lists  - About the mailing lists

Support

Please direct usage questions or support issues to the mailing list:

bioperl-l@bioperl.org

rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible.

Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the web:

https://github.com/bioperl/bioperl-live/issues

AUTHOR - Hilmar Lapp

Hilmar Lapp E<lt>hlapp@gmx.netE<gt>
Allen Day E<lt>allenday@ucla.eduE<gt>

APPENDIX

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

new

Title   : new
Usage   : my $obj = Bio::Ontology::OntologyStore->new();
Function: Returns the Bio::Ontology::OntologyStore object.

          Unlike usual implementations of new, this implementation
          will try to return a previously instantiated store, if
          there is any. It is just a synonym for get_instance. In
          order to avoid ambiguities in your code, you may rather
          want to call rather get_instance explicitly, which also
          usually is better associated with this kind of behaviour.

Returns : an instance of Bio::Ontology::OntologyStore
Args    :

get_instance

Title   : get_instance
Usage   :
Function: Get an instance of this class for perusal.

          Since by design this class is meant to be used as a
          singleton, the implementation will return a previously
          instantianted store if there is one, and instantiate a new
          one otherwise. In order to use this class by means of an
          instance, call this method for added code clarity, not
          new().

Example :
Returns : an instance of this class
Args    : named parameters, if any (currently, there are no 
          class-specific parameters other than those accepted by
          Bio::Root::Root.

See Bio::Root::Root.

get_ontology

Title   : get_ontology
Usage   :
Function: Get a previously instantiated and registered instance of
          this class by name or by identifier. 

          One of the main purposes of this class is to enable TermI
          implementations to return their respective ontology without
          keeping a strong reference to the respective ontology
          object. Only objects previously registered objects can be
          retrieved.

          This is a class method, hence you can call it on the class
          name, without dereferencing an object.

Example :
Returns : a Bio::Ontology::OntologyI implementing object, or undef
          if the query could not be satisfied
Args    : Named parameters specifying the query. The following parameters
          are recognized:
             -name   query the store for an ontology with the given name
             -id     query for an ontology with the given identifier
          If both are specified, an implicit AND logical operator is
          assumed.

See Bio::Ontology::OntologyI.

register_ontology

Title   : register_ontology
Usage   :
Function: Registers the given Ontology object for later retrieval
          by name and identifier.

Example :
Returns : TRUE on success and FALSE otherwise
Args    : the Bio::Ontology::OntologyI object(s) to register

See Bio::Ontology::OntologyI.

remove_ontology

Title   : remove_ontology
Usage   :
Function: Remove the specified ontology from the store.
Example :
Returns : TRUE on success and FALSE otherwise
Args    : the Bio::Ontology::OntologyI implementing object(s)
          to be removed from the store

See Bio::Ontology::OntologyI.

guess_ontology()

Usage   : my $ontology = 
          Bio::Ontology::OntologyStore->guess_ontology('GO:0000001');
Function: tries to guess which ontology a term identifier comes from, 
          loads it as necessary,
          and returns it as a Bio::Ontology::Ontology object.
Example :
Returns : a Bio::Ontology::Ontology object, or warns and returns undef
Args    : an ontology term identifier in XXXX:DDDDDDD format.  
          Guessing is based on the XXXX string before the colon.