| Bio::Ontology::OntologyStore(3pm) | User Contributed Perl Documentation | Bio::Ontology::OntologyStore(3pm) |
Bio::Ontology::OntologyStore - A repository of ontologies
#----------
#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' instance...
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');
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.
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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.
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Hilmar Lapp E<lt>hlapp@gmx.netE<gt> Allen Day E<lt>allenday@ucla.eduE<gt>
The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _
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 :
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.
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.
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.
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.
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.
| 2018-10-27 | perl v5.26.2 |