Godeps/_workspace/src/github.com/pborman/uuid/sql.go


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// 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
}