| // Copyright 2015 Google Inc. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package uuid |
| |
| import ( |
| "errors" |
| "fmt" |
| ) |
| |
| // Scan implements sql.Scanner so UUIDs can be read from databases transparently |
| // Currently, database types that map to string and []byte are supported. Please |
| // consult database-specific driver documentation for matching types. |
| func (uuid *UUID) Scan(src interface{}) error { |
| switch src.(type) { |
| case string: |
| // see uuid.Parse for required string format |
| parsed := Parse(src.(string)) |
| |
| if parsed == nil { |
| return errors.New("Scan: invalid UUID format") |
| } |
| |
| *uuid = parsed |
| case []byte: |
| // assumes a simple slice of bytes, just check validity and store |
| u := UUID(src.([]byte)) |
| |
| if u.Variant() == Invalid { |
| return errors.New("Scan: invalid UUID format") |
| } |
| |
| *uuid = u |
| default: |
| return fmt.Errorf("Scan: unable to scan type %T into UUID", src) |
| } |
| |
| return nil |
| } |