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# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
module Redmine
module SubclassFactory
def self.included(base)
base.extend ClassMethods
end
module ClassMethods
def get_subclass(class_name)
klass = nil
begin
klass = class_name.to_s.classify.constantize
rescue
# invalid class name
end
unless subclasses.include? klass
klass = nil
end
klass
end
# Returns an instance of the given subclass name
def new_subclass_instance(class_name, *args)
klass = get_subclass(class_name)
if klass
klass.new(*args)
end
end
end
end
end
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