Bio::Factory::DriverFactory - Base class for factory classes loading drivers

BioPerl documentation Contained in the BioPerl distribution.

Index

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NAME

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Bio::Factory::DriverFactory - Base class for factory classes loading drivers

SYNOPSIS

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 #this class is not instantiable

DESCRIPTION

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This a base class for factory classes that load drivers. Normally, you don't instantiate this class directly.

FEEDBACK

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Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists. 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 the bugs and their resolution. Bug reports can be submitted via the web:

  https://redmine.open-bio.org/projects/bioperl/

AUTHOR - Jason Stajich

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Email Jason Stajich <jason@bioperl.org>

APPENDIX

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

register_driver

 Title   : register_driver
 Usage   : $factory->register_driver("genscan", "Bio::Tools::Genscan");
 Function: Registers a driver a factory class should be able to instantiate.

           This method can be called both as an instance and as a class
           method.

 Returns : 
 Args    : Key of the driver (string) and the module implementing the driver
           (string).

driver_table

 Title   : driver_table
 Usage   : $table = $factory->driver_table();
 Function: Returns a reference to the hash table storing associations of
           methods with drivers.

           You use this table to look up registered methods (keys) and
           drivers (values).

           In this implementation the table is class-specific and therefore
           shared by all instances. You can override this in a derived class,
           but note that this method can be called both as an instance and a
           class method.

           This will be the table used by the object internally. You should
           definitely know what you're doing if you modify the table's
           contents. Modifications are shared by _all_ instances, those present
           and those yet to be created.

 Returns : A reference to a hash table.
 Args    :

get_driver

 Title   : get_driver
 Usage   : $module = $factory->get_driver("genscan");
 Function: Returns the module implementing a driver registered under the
           given key.
 Example : 
 Returns : A string.
 Args    : Key of the driver (string).

_load_module

 Title   : _load_module
 Usage   : $self->_load_module("Bio::Tools::Genscan");
 Function: Loads up (like use) a module at run time on demand.
 Example : 
 Returns : TRUE on success
 Args    :
BioPerl documentation Contained in the BioPerl distribution. 
#
# BioPerl module for Bio::Factory::DriverFactory
#
# Please direct questions and support issues to <bioperl-l@bioperl.org> 
#
# Cared for by Jason Stajich <jason@bioperl.org> and
#              Hilmar Lapp <hlapp@gmx.net>
#
# Copyright Jason Stajich, Hilmar Lapp
#
# You may distribute this module under the same terms as perl itself

# POD documentation - main docs before the code


#'
package Bio::Factory::DriverFactory;
use strict;
use File::Spec;

use vars qw(%DRIVERS);

use base qw(Bio::Root::Root);

BEGIN {
    %DRIVERS = ();
}

sub new {
    my ($class, @args) = @_;
    my $self = $class->SUPER::new(@args);
    return $self;
}


sub register_driver {
    my ($self, @args) = @_;
    my %drivers = @args;

    foreach my $drv (keys(%drivers)) {
	# note that this doesn't care whether $self is the class or the object
	$self->driver_table()->{$drv} = $drivers{$drv};
    }
}


sub driver_table {
    my ($self, @args) = @_;

    return \%DRIVERS;
}


sub get_driver {
    my ($self, $key) = @_;

    if(exists($self->driver_table()->{$key})) {
	return $self->driver_table()->{$key};
    }
    return;
}


sub _load_module {
    my ($self, $name) = @_;
    my ($module, $load, $m);
    $module = "_<$name.pm";
    return 1 if $main::{$module};
    $load = "$name.pm";

    $load = File::Spec->catfile((split(/::/,$load)));
    eval {
	require $load;
    };
    if ( $@ ) {
	$self->throw("$load: $name cannot be found: ".$@);
    }
    return 1;
}

1;