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Contents
#
# ActiveFacts API
# Role class.
# Each accessor method created on an instance corresponds to a Role object in the instance's class.
# Binary fact types construct a Role at each end.
#
# Copyright (c) 2009 Clifford Heath. Read the LICENSE file.
#
module ActiveFacts
module API
class FactType
attr_accessor :all_role
# invariant { self.all_role.each {|role| self.is_a?(ObjectifiedFactType) ? role.counterpart.object_type == self.objectified_as : role.fact_type == self } }
def initialize
@all_role ||= []
end
end
class ObjectifiedFactType < FactType
# The roles of an ObjectifiedFactType are roles in the link fact types.
# This means that all_role[*].fact_type does not point to this fact type,
# as would normally be the case.
# invariant { self.all_role.each {|role| role.counterpart.object_type == self.objectified_as } }
attr_reader :objectified_as
# invariant { self.objectified_as.objectification_of == self }
end
class TypeInheritanceFactType < FactType
attr_reader :supertype_role, :subtype_role
def initialize(supertype, subtype)
super()
# The supertype role is not mandatory, but the subtype role is. Both are unique.
@supertype_role = Role.new(self, supertype, subtype.name.gsub(/.*::/,'').to_sym, false, true)
@subtype_role = Role.new(self, subtype, supertype.name.gsub(/.*::/,'').to_sym, true, true)
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems