Chris@1296: # Redmine - project management software
Chris@1296: # Copyright (C) 2006-2012  Jean-Philippe Lang
Chris@1296: #
Chris@1296: # This program is free software; you can redistribute it and/or
Chris@1296: # modify it under the terms of the GNU General Public License
Chris@1296: # as published by the Free Software Foundation; either version 2
Chris@1296: # of the License, or (at your option) any later version.
Chris@1296: #
Chris@1296: # This program is distributed in the hope that it will be useful,
Chris@1296: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@1296: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@1296: # GNU General Public License for more details.
Chris@1296: #
Chris@1296: # You should have received a copy of the GNU General Public License
Chris@1296: # along with this program; if not, write to the Free Software
Chris@1296: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@1296: 
Chris@1296: module Redmine
Chris@1296:   module SubclassFactory
Chris@1296:     def self.included(base) 
Chris@1296:       base.extend ClassMethods
Chris@1296:     end 
Chris@1296: 
Chris@1296:     module ClassMethods
Chris@1296:       def get_subclass(class_name)
Chris@1296:         klass = nil
Chris@1296:         begin
Chris@1296:           klass = class_name.to_s.classify.constantize
Chris@1296:         rescue
Chris@1296:           # invalid class name
Chris@1296:         end
Chris@1296:         unless subclasses.include? klass
Chris@1296:           klass = nil
Chris@1296:         end
Chris@1296:         klass
Chris@1296:       end
Chris@1296: 
Chris@1296:       # Returns an instance of the given subclass name
Chris@1296:       def new_subclass_instance(class_name, *args)
Chris@1296:         klass = get_subclass(class_name)
Chris@1296:         if klass
Chris@1296:           klass.new(*args)
Chris@1296:         end
Chris@1296:       end
Chris@1296:     end
Chris@1296:   end
Chris@1296: end