Bio::Factory::ObjectFactory - Instantiates a new Bio::Root::RootI (or derived class) through a factory


    use Bio::Factory::ObjectFactory;

    my $factory = Bio::Factory::ObjectFactory->new(-type => 'Bio::Ontology::GOterm');
    my $term = $factory->create_object(-name => 'peroxisome',
                                       -ontology => 'Gene Factory',
                                       -identifier => 'GO:0005777');


This object will build Bio::Root::RootI objects generically.


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AUTHOR - Hilmar Lapp

Email hlapp at


This is mostly copy-and-paste with subsequent adaptation from Bio::Seq::SeqFactory by Jason Stajich. Most credits should in fact go to him.


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


 Title   : new
 Usage   : my $obj = Bio::Factory::ObjectFactory->new();
 Function: Builds a new Bio::Factory::ObjectFactory object 
 Returns : Bio::Factory::ObjectFactory
 Args    : -type      => string, name of a L<Bio::Root::RootI> derived class.
                         There is no default.
           -interface => string, name of the interface or class any type
                         specified needs to at least implement.
                         The default is Bio::Root::RootI.


 Title   : create_object
 Usage   : my $seq = $factory->create_object(<named parameters>);
 Function: Instantiates a new object of the previously set type.

           This object allows us to genericize the instantiation of

           You must have provided -type at instantiation, or have
           called type($mytype) before you can call this method.

 Returns : an object of the type returned by type()

           The return type is configurable using new(-type =>"..."),
           or by calling $self->type("My::Fancy::Class").
 Args    : Initialization parameters specific to the type of
           object we want. Check the POD of the class you set as type.


 Title   : type
 Usage   : $obj->type($newval)
 Function: Get/set the type of object to be created.

           This may be changed at any time during the lifetime of this

 Returns : value of type (a string)
 Args    : newvalue (optional, a string)


 Title   : interface
 Usage   : $obj->interface($newval)
 Function: Get/set the interface or base class that supplied types
           must at least implement (inherit from).
 Example : 
 Returns : value of interface (a scalar)
 Args    : on set, new value (a scalar or undef, optional)


 Title   : _validate_type
 Usage   : $factory->_validate_type($object)
 Function: Called to let derived factories validate the type set
           via type().

           The default implementation here checks whether the supplied
           object skeleton implements the interface set via -interface
           upon factory instantiation.

 Example :
 Returns : TRUE if the type is to be considered valid, and FALSE otherwise.
           Instead of returning FALSE this method may also just throw
           an informative exception.

           The default implementation here will throw an exception
           if the supplied object does not inherit from the interface
           provided by the interface() method.

 Args    : A hash reference blessed into the specified type, allowing
           queries like isa().