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|
package pgtype
import (
"database/sql/driver"
"fmt"
)
// ACLItem is used for PostgreSQL's aclitem data type. A sample aclitem
// might look like this:
//
// postgres=arwdDxt/postgres
//
// Note, however, that because the user/role name part of an aclitem is
// an identifier, it follows all the usual formatting rules for SQL
// identifiers: if it contains spaces and other special characters,
// it should appear in double-quotes:
//
// postgres=arwdDxt/"role with spaces"
//
type ACLItem struct {
String string
Status Status
}
func (dst *ACLItem) Set(src interface{}) error {
if src == nil {
*dst = ACLItem{Status: Null}
return nil
}
if value, ok := src.(interface{ Get() interface{} }); ok {
value2 := value.Get()
if value2 != value {
return dst.Set(value2)
}
}
switch value := src.(type) {
case string:
*dst = ACLItem{String: value, Status: Present}
case *string:
if value == nil {
*dst = ACLItem{Status: Null}
} else {
*dst = ACLItem{String: *value, Status: Present}
}
default:
if originalSrc, ok := underlyingStringType(src); ok {
return dst.Set(originalSrc)
}
return fmt.Errorf("cannot convert %v to ACLItem", value)
}
return nil
}
func (dst ACLItem) Get() interface{} {
switch dst.Status {
case Present:
return dst.String
case Null:
return nil
default:
return dst.Status
}
}
func (src *ACLItem) AssignTo(dst interface{}) error {
switch src.Status {
case Present:
switch v := dst.(type) {
case *string:
*v = src.String
return nil
default:
if nextDst, retry := GetAssignToDstType(dst); retry {
return src.AssignTo(nextDst)
}
return fmt.Errorf("unable to assign to %T", dst)
}
case Null:
return NullAssignTo(dst)
}
return fmt.Errorf("cannot decode %#v into %T", src, dst)
}
func (dst *ACLItem) DecodeText(ci *ConnInfo, src []byte) error {
if src == nil {
*dst = ACLItem{Status: Null}
return nil
}
*dst = ACLItem{String: string(src), Status: Present}
return nil
}
func (src ACLItem) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
switch src.Status {
case Null:
return nil, nil
case Undefined:
return nil, errUndefined
}
return append(buf, src.String...), nil
}
// Scan implements the database/sql Scanner interface.
func (dst *ACLItem) Scan(src interface{}) error {
if src == nil {
*dst = ACLItem{Status: Null}
return nil
}
switch src := src.(type) {
case string:
return dst.DecodeText(nil, []byte(src))
case []byte:
srcCopy := make([]byte, len(src))
copy(srcCopy, src)
return dst.DecodeText(nil, srcCopy)
}
return fmt.Errorf("cannot scan %T", src)
}
// Value implements the database/sql/driver Valuer interface.
func (src ACLItem) Value() (driver.Value, error) {
switch src.Status {
case Present:
return src.String, nil
case Null:
return nil, nil
default:
return nil, errUndefined
}
}
|
