func (e batchExpireJobError) Error() string {
	return e.Description
}

// maxBatchRules maximum number of rules a batch-expiry job supports
const maxBatchRules = 50

// Validate validates the job definition input
func (r *BatchJobExpire) Validate(ctx context.Context, job BatchJobRequest, o ObjectLayer) error {
	if r == nil {
		return nil
	}

	if r.APIVersion != batchExpireAPIVersion {
		return batchExpireJobError{