diff options
Diffstat (limited to 'entity/err.go')
| -rw-r--r-- | entity/err.go | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/entity/err.go b/entity/err.go index 408e27b4..4453d36e 100644 --- a/entity/err.go +++ b/entity/err.go @@ -5,13 +5,34 @@ import ( "strings" ) +// ErrNotFound is to be returned when an entity, item, element is +// not found. +type ErrNotFound struct { + typename string +} + +func NewErrNotFound(typename string) *ErrNotFound { + return &ErrNotFound{typename: typename} +} + +func (e ErrNotFound) Error() string { + return fmt.Sprintf("%s doesn't exist", e.typename) +} + +func IsErrNotFound(err error) bool { + _, ok := err.(*ErrNotFound) + return ok +} + +// ErrMultipleMatch is to be returned when more than one entity, item, element +// is found, where only one was expected. type ErrMultipleMatch struct { - entityType string - Matching []Id + typename string + Matching []Id } -func NewErrMultipleMatch(entityType string, matching []Id) *ErrMultipleMatch { - return &ErrMultipleMatch{entityType: entityType, Matching: matching} +func NewErrMultipleMatch(typename string, matching []Id) *ErrMultipleMatch { + return &ErrMultipleMatch{typename: typename, Matching: matching} } func (e ErrMultipleMatch) Error() string { @@ -22,7 +43,7 @@ func (e ErrMultipleMatch) Error() string { } return fmt.Sprintf("Multiple matching %s found:\n%s", - e.entityType, + e.typename, strings.Join(matching, "\n")) } @@ -31,6 +52,8 @@ func IsErrMultipleMatch(err error) bool { return ok } +// ErrInvalidFormat is to be returned when reading on-disk data with an unexpected +// format or version. type ErrInvalidFormat struct { version uint expected uint |