BDCS.Exceptions

Utilities for working with database-related exceptions.

Documentation

data DBException

A general purpose exception type for dealing with things that go wrong when working with the database. This type could grow into a more complex system in the future, if needed. This type is most helpful because runSqlite will roll back the entire transaction if an exception is raised.

Constructors

DBException String

A general purpose exception type, including an error message.

MissingRPMTag String

A required tag was missing from the RPM being processed. The argument should be the name of the missing tag.

BadName String

The name of the package is not parseable.

Instances

Eq DBException

Methods

(==) :: DBException -> DBException -> Bool

(/=) :: DBException -> DBException -> Bool

Show DBException

Methods

showsPrec :: Int -> DBException -> ShowS

show :: DBException -> String

showList :: [DBException] -> ShowS

Exception DBException

Methods

toException :: DBException -> SomeException

fromException :: SomeException -> Maybe DBException

displayException :: DBException -> String

isBadNameException :: DBException -> Bool

Is a given DBException type a BadName?

isDBExceptionException :: DBException -> Bool

Is a given DBException type the general DBException?

isMissingRPMTagException :: DBException -> Bool

Is a given DBException type a MissingRPMTag?

throwIfNothing :: Exception e => Maybe a -> e -> a

If a Maybe value is Nothing, throw the given exception. Otherwise, return the value inside.

throwIfNothingOtherwise :: Exception e => Maybe a -> e -> (a -> b) -> b

If a Maybe value is Nothing, throw the given exception. Otherwise, run the provided function on the value inside and return the result.