{- |

Module : $Header$

Description : Translation of development graphs along comorphisms

Copyright : Heng Jiang, Uni Bremen 2004-2006

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : jiang@informatik.uni-bremen.de

Stability : provisional

Portability : non-portable(Logic)

Translation of development graphs along comorphisms

Follows Sect. IV:4.3 of the CASL Reference Manual.

-}

module Static.DGTranslation

( libEnv_translation

) where

import Static.GTheory

import Static.DevGraph

import Logic.Logic

import Logic.Coerce

import Logic.Comorphism

import Logic.Grothendieck

import Logic.Prover

import Common.ExtSign

import Common.LibName

import Common.Result

import qualified Data.Map as Map

import qualified List as List (nub)

import Data.Maybe

import Data.Graph.Inductive.Graph

import Control.Exception

-- | translation of a LibEnv (a map of globalcontext)

libEnv_translation :: LibEnv -> AnyComorphism -> Result LibEnv

libEnv_translation libEnv comorphism =

updateGc (Map.keys libEnv) libEnv []

where updateGc :: [LIB_NAME] -> LibEnv -> [Diagnosis] -> Result LibEnv

updateGc [] le diag = Result diag (Just le)

updateGc (k1:kr) le diagnosis =

let gc = lookupDGraph k1 le

Result diagTran gc' = dg_translation gc comorphism

in updateGc kr (Map.update (\_ -> gc') k1 le)

(diagnosis ++ diagTran)

dg_translation :: DGraph -> AnyComorphism -> Result DGraph

dg_translation gc acm@(Comorphism cidMor) =

let labNodesList = labNodesDG gc

labEdgesList = labEdgesDG gc

in do

resOfEdges <- mapR updateEdges labEdgesList

resOfNodes <- mapR updateNodes labNodesList

return $ mkGraphDG resOfNodes resOfEdges emptyDG

where

slid = sourceLogic cidMor

tlid = targetLogic cidMor

updateEdges :: LEdge DGLinkLab -> Result (LEdge DGLinkLab)

updateEdges

(from,to,(links@(DGLink { dgl_morphism=

gm@(GMorphism cid' (ExtSign lsign _) ind1 lmorphism ind2)}))) =

if isHomogeneous gm

then

let sourceLid = sourceLogic cid'

targetLid = targetLogic cid'

minTargetSublogic = G_sublogics targetLid $ minSublogic lmorphism

in if lessSublogicComor (G_sublogics sourceLid $ minSublogic lsign) acm

&& lessSublogicComor minTargetSublogic acm

then

do -- translate sign of GMorphism

(lsign', _) <- fSign sourceLid lsign

-- translate morphism of GMorphism

lmorphism' <- fMor targetLid lmorphism

-- build a new GMorphism of an edge

case idComorphism (Logic tlid) of

Comorphism cid2 ->

let newSign = fromJust $ coercePlainSign tlid

(sourceLogic cid2) "DGTranslation.updateEdges"

lsign'

newMor = fromJust $ coerceMorphism tlid

(targetLogic cid2) "DGTranslation.updateEdges"

lmorphism'

slNewSign = G_sublogics (sourceLogic cid2)

$ minSublogic newSign

targetLogic2 = targetLogic cid2

domMor = G_sublogics targetLogic2

$ minSublogic $ dom newMor

in

-- ("old:\n" ++ showDoc lsign "\nnew:\n" ++ showDoc newSign "\n\n")

return $ assert (slNewSign == domMor) $

(from, to,

links{dgl_morphism= GMorphism cid2

(mkExtSign newSign)

ind1 newMor ind2

}

)

else Result [mkDiag Error ("the sublogic of GMorphism :\"" ++

show minTargetSublogic

++ " of edge " ++ showFromTo from to gc

++ " is not less than " ++ show acm) ()] Nothing

else Result [mkDiag Error ("Link "++ showFromTo from to gc ++

" is not homogeneous.") ()] Nothing

updateNodes :: LNode DGNodeLab -> Result (LNode DGNodeLab)

updateNodes (node, dgNodeLab) =

case fTh node $ dgn_theory dgNodeLab of

Result diagsT maybeTh ->

maybe (Result diagsT (Nothing))

(\th' -> Result diagsT

(Just (node, dgNodeLab {dgn_theory = th'

,dgn_nf = Nothing

,dgn_sigma = Nothing

}))) maybeTh

-- !! the sign from fSign and from fTh maybe different.

-- to translate sign

fSign sourceID sign =

coercePlainSign sourceID slid "DGTranslation.fSign" sign >>=

map_sign cidMor

fTh _ (G_theory lid sign _ thSens _) = do

-- (sign', _) <- fSign lid sign

(ExtSign sign' _) <-

coerceSign lid slid "DGTranslation.fTh.sign" sign

thSens' <- coerceThSens lid slid "DGTranslation.fTh.sen" thSens

(sign'', namedS) <- wrapMapTheory cidMor (sign', toNamedList thSens')

return $ G_theory tlid (mkExtSign sign'') startSigId

(toThSens $ List.nub namedS) startThId

fMor sourceID mor =

coerceMorphism sourceID slid "DGTranslation.fMor" mor >>=

map_morphism cidMor

showFromTo :: Node -> Node -> DGraph -> String

showFromTo from to gc =

"from " ++ getNameOfNode from gc ++ " to " ++ getNameOfNode to gc