Copyright	(c) 2016-2017 Red Hat Inc.
License	LGPL
Maintainer	https://github.com/weldr
Stability	alpha
Portability	portable
Safe Haskell	Safe
Language	Haskell2010

BDCS.Exceptions

Description

Utilities for working with database-related exceptions.

Synopsis

Documentation

data DBException Source #

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 Source #
Methods (==) :: DBException -> DBException -> Bool # (/=) :: DBException -> DBException -> Bool #
Show DBException Source #
Methods showsPrec :: Int -> DBException -> ShowS # show :: DBException -> String # showList :: [DBException] -> ShowS #
Exception DBException Source #
Methods toException :: DBException -> SomeException # fromException :: SomeException -> Maybe DBException # displayException :: DBException -> String #

isBadNameException :: DBException -> Bool Source #

Is a given DBException type a BadName?

isDBExceptionException :: DBException -> Bool Source #

Is a given DBException type the general DBException?

isMissingRPMTagException :: DBException -> Bool Source #

Is a given DBException type a MissingRPMTag?

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

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

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

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