# File lib/authorization.rb, line 253
253:     def initialize (role, privileges_or_context = [], context = nil)
254:       @role = role
255:       @privileges = Set.new
256:       if privileges_or_context.is_a?(Array)
257:         @context = context
258:         append_privileges(privileges_or_context)
259:       else
260:         @context = privileges_or_context
261:       end
262:       @attributes = []
263:     end

     # File lib/authorization.rb, line 269
269:     def append_attribute (attribute)
270:       @attributes << attribute
271:     end

     # File lib/authorization.rb, line 265
265:     def append_privileges (privs)
266:       @privileges.merge(privs)
267:     end

     # File lib/authorization.rb, line 273
273:     def matches? (roles, privs, context = nil)
274:       roles = [roles] unless roles.is_a?(Array)
275:       @context == context and roles.include?(@role) and 
276:         not (@privileges & privs).empty?
277:     end