jro_apps/redmine Files · lib/redmine/subclass_factory.rb

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             subclass_factory.rb
        
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             / lib / redmine / subclass_factory.rb
          
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      # Redmine - project management software

      # Copyright (C) 2006-2014  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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				# Redmine - project management software
				# Copyright (C) 2006-2014 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