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