module AWS::SNS::HasDeliveryPolicy

def delivery_policy
  parse_delivery_policy(delivery_policy_json)
end

def delivery_policy= policy
  policy_json = case policy
  when nil then ''
  when String then policy
  else policy.to_json
  end
  update_delivery_policy(policy_json)
end

def delivery_policy_json
  raise NotImplementedError
end

def effective_delivery_policy
  parse_delivery_policy(effective_delivery_policy_json)
end

def effective_delivery_policy_json
  raise NotImplementedError
end

def parse_delivery_policy policy_json
  policy_json.nil? ? nil : JSON.parse(policy_json)
end

def update_delivery_policy policy_json
  raise NotImplementedError
end