{- |

Module : $Header$

Description : OWL Morphisms

Copyright : (c) Dominik Luecke, 2008, Felix Gabriel Mance, 2011

License : GPLv2 or higher, see LICENSE.txt

Maintainer : f.mance@jacobs-university.de

Stability : provisional

Portability : portable

Morphisms for OWL

-}

module OWL2.Morphism

( OWLMorphism (..)

, isOWLInclusion

, inclOWLMorphism

, legalMor

, composeMor

, cogeneratedSign

, generatedSign

, matchesSym

, statSymbItems

, statSymbMapItems

, inducedFromMor

, symMapOf

, mapSen

) where

import OWL2.AS

import OWL2.MS

import OWL2.Sign

import OWL2.ManchesterPrint ()

import OWL2.StaticAnalysis

import OWL2.Symbols

import OWL2.Function

import Common.DocUtils

import Common.Doc

import Common.Result

import Common.Utils (composeMap)

import Common.Lib.State (execState)

import Common.Lib.MapSet (setToMap)

import Control.Monad

import Data.Maybe

import qualified Data.Map as Map

import qualified Data.Set as Set

data OWLMorphism = OWLMorphism

{ osource :: Sign

, otarget :: Sign

, mmaps :: MorphMap

, pmap :: StringMap

} deriving (Show, Eq, Ord)

inclOWLMorphism :: Sign -> Sign -> OWLMorphism

inclOWLMorphism s t = OWLMorphism

{ osource = s

, otarget = t

, pmap = Map.empty

, mmaps = Map.empty }

isOWLInclusion :: OWLMorphism -> Bool

isOWLInclusion m = Map.null (pmap m)

&& Map.null (mmaps m) && isSubSign (osource m) (otarget m)

symMap :: MorphMap -> Map.Map Entity Entity

symMap = Map.mapWithKey (\ (Entity ty _) -> Entity ty)

inducedElems :: MorphMap -> [Entity]

inducedElems = Map.elems . symMap

inducedSign :: MorphMap -> StringMap -> Sign -> Sign

inducedSign m t s =

let new = execState (do

mapM_ (modEntity Set.delete) $ Map.keys m

mapM_ (modEntity Set.insert) $ inducedElems m) s

in function Rename (StringMap t) new

inducedPref :: String -> String -> Sign -> (MorphMap, StringMap)

-> (MorphMap, StringMap)

inducedPref v u sig (m, t) =

let pm = prefixMap sig

in if Set.member v $ Map.keysSet pm

then if u == v then (m, t) else (m, Map.insert v u t)

else error $ "unknown symbol: " ++ showDoc v "\n" ++ shows sig ""

inducedFromMor :: Map.Map RawSymb RawSymb -> Sign -> Result OWLMorphism

inducedFromMor rm sig = do

let syms = symOf sig

(mm, tm) <- foldM (\ (m, t) p -> case p of

(ASymbol s@(Entity _ v), ASymbol (Entity _ u)) ->

if Set.member s syms

then return $ if u == v then (m, t) else (Map.insert s u m, t)

else fail $ "unknown symbol: " ++ showDoc s "\n" ++ shows sig ""

(AnUri v, AnUri u) -> case filter (`Set.member` syms)

$ map (`Entity` v) entityTypes of

[] -> let v2 = showQU v

u2 = showQU u

in return $ inducedPref v2 u2 sig (m, t)

l -> return $ if u == v then (m, t) else

(foldr (`Map.insert` u) m l, t)

(APrefix v, APrefix u) -> return $ inducedPref v u sig (m, t)

_ -> error "OWL2.Morphism.inducedFromMor") (Map.empty, Map.empty)

$ Map.toList rm

return OWLMorphism

{ osource = sig

, otarget = inducedSign mm tm sig

, pmap = tm

, mmaps = mm }

symMapOf :: OWLMorphism -> Map.Map Entity Entity

symMapOf mor = Map.union (symMap $ mmaps mor) $ setToMap $ symOf $ osource mor

instance Pretty OWLMorphism where

pretty m = let

s = osource m

srcD = specBraces $ space <> pretty s

t = otarget m

in if isOWLInclusion m then

if isSubSign t s then

fsep [text "identity morphism over", srcD]

else fsep

[ text "inclusion morphism of"

, srcD

, text "extended with"

, pretty $ Set.difference (symOf t) $ symOf s ]

else fsep

[ pretty $ mmaps m

, pretty $ pmap m

, colon <+> srcD, mapsto <+> specBraces (space <> pretty t) ]

legalMor :: OWLMorphism -> Result ()

legalMor m = let mm = mmaps m in if

Set.isSubsetOf (Map.keysSet mm) (symOf $ osource m)

&& Set.isSubsetOf (Set.fromList $ inducedElems mm) (symOf $ otarget m)

then return () else fail "illegal OWL2 morphism"

composeMor :: OWLMorphism -> OWLMorphism -> Result OWLMorphism

composeMor m1 m2 =

let nm = Set.fold (\ s@(Entity ty u) -> let

t = getIri ty u $ mmaps m1

r = getIri ty t $ mmaps m2

in if r == u then id else Map.insert s r) Map.empty

. symOf $ osource m1

in return m1

{ otarget = otarget m2

, pmap = composeMap (prefixMap $ osource m1) (pmap m1) $ pmap m2

, mmaps = nm }

cogeneratedSign :: Set.Set Entity -> Sign -> Result OWLMorphism

cogeneratedSign s sign =

let sig2 = execState (mapM_ (modEntity Set.delete) $ Set.toList s) sign

in if isSubSign sig2 sign then return $ inclOWLMorphism sig2 sign else

fail "non OWL2 subsignatures for (co)generatedSign"

generatedSign :: Set.Set Entity -> Sign -> Result OWLMorphism

generatedSign s sign = cogeneratedSign (Set.difference (symOf sign) s) sign

matchesSym :: Entity -> RawSymb -> Bool

matchesSym e@(Entity _ u) r = case r of

ASymbol s -> s == e

AnUri s -> s == u || namePrefix u == localPart s && null (namePrefix s)

APrefix p -> p == namePrefix u

statSymbItems :: [SymbItems] -> [RawSymb]

statSymbItems = concatMap

$ \ (SymbItems m us) -> case m of

AnyEntity -> map AnUri us

EntityType ty -> map (ASymbol . Entity ty) us

Prefix -> map (APrefix . showQN) us

statSymbMapItems :: [SymbMapItems] -> Result (Map.Map RawSymb RawSymb)

statSymbMapItems =

foldM (\ m (s, t) -> case Map.lookup s m of

Nothing -> return $ Map.insert s t m

Just u -> case (u, t) of

(AnUri su, ASymbol (Entity _ tu)) | su == tu ->

return $ Map.insert s t m

(ASymbol (Entity _ su), AnUri tu) | su == tu -> return m

(AnUri su, APrefix tu) | showQU su == tu ->

return $ Map.insert s t m

(APrefix su, AnUri tu) | su == showQU tu -> return m

_ -> if u == t then return m else

fail $ "differently mapped symbol: " ++ showDoc s "\nmapped to "

++ showDoc u " and " ++ showDoc t "")

Map.empty

. concatMap (\ (SymbMapItems m us) ->

let ps = map (\ (u, v) -> (u, fromMaybe u v)) us in

case m of

AnyEntity -> map (\ (s, t) -> (AnUri s, AnUri t)) ps

EntityType ty ->

let mS = ASymbol . Entity ty

in map (\ (s, t) -> (mS s, mS t)) ps

Prefix ->

map (\ (s, t) -> (APrefix (showQU s), APrefix $ showQU t)) ps)

mapSen :: OWLMorphism -> Axiom -> Result Axiom

mapSen m a = do

let new = function Rename (MorphMap $ mmaps m) a

return $ function Rename (StringMap $ pmap m) new