{- |

Module : $Header$

Description : abstract ADL syntax

Copyright : (c) Stef Joosten, Christian Maeder DFKI GmbH 2010

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

Maintainer : Christian.Maeder@dfki.de

Stability : provisional

Portability : portable

-}

module Adl.As where

import Data.Char

import Common.Id

data Concept

= C Token -- ^ The name of this Concept

| Anything -- ^ Really anything as introduced by I and V

deriving (Eq, Ord, Show)

data Relation = Sgn

{ decnm :: Token -- ^ the name

, desrc :: Concept -- ^ the source concept

, detrg :: Concept -- ^ the target concept

} deriving (Eq, Ord, Show)

data UnOp

= K0 -- ^ Reflexive and transitive closure *

| K1 -- ^ Transitive closure +

| Cp -- ^ Complement -

| Co -- ^ Converse ~

deriving (Eq, Ord, Show)

data MulOp

= Fc -- ^ composition ;

| Fd -- ^ relative addition !

| Fi -- ^ intersection /\.

| Fu -- ^ union \/

deriving (Eq, Ord, Show)

data Expression

= Tm Relation

| MulExp MulOp [Expression]

| UnExp UnOp Expression

deriving (Eq, Ord, Show)

data RuleType = Implication | ReverseImpl | Equivalence deriving (Eq, Ord, Show)

data Rule

= Rule Expression RuleType Expression

| Truth Expression

deriving (Eq, Ord, Show)

data Prop

= Uni -- ^ univalent

| Inj -- ^ injective

| Sur -- ^ surjective

| Tot -- ^ total

| Sym -- ^ symmetric

| Asy -- ^ antisymmetric

| Trn -- ^ transitive

| Rfx -- ^ reflexive

| Prop -- ^ meta property

deriving (Enum, Eq, Ord, Show)

showUp :: Show a => a -> String

showUp = map toUpper . show

allProps :: [Prop]

allProps = [Uni .. Rfx]

data RangedProp = RangedProp

{ propProp :: Prop

, propRange :: Range }

deriving (Eq, Ord, Show) -- should be fine since ranges are always equal

-- | create a ranged property

rProp :: Prop -> RangedProp

rProp p = RangedProp p nullRange

data Object = Object

{ label :: Token

, expr :: Expression

, props :: [RangedProp]

, subobjs :: [Object]

} deriving Show

data KeyAtt = KeyAtt (Maybe Token) Expression deriving Show

data KeyDef = KeyDef

{ kdlbl :: Token

, kdcpt :: Concept

, kdats :: [KeyAtt]

} deriving Show

data RuleKind = SignalOn | Signals | Maintains deriving (Eq, Ord, Show)

showRuleKind :: RuleKind -> String

showRuleKind k = if k == SignalOn then "ON"

else showUp k

data RuleHeader = Always | RuleHeader RuleKind Token deriving Show

data Pair = Pair Token Token deriving Show

data Plugin = Service | Sqlplug | Phpplug deriving Show

data PatElem

= Pr RuleHeader Rule

| Pg Concept Concept -- specific and generic concept

| Pk KeyDef

| Pm [RangedProp] Relation Bool -- True indicates population

| Plug Plugin Object

| Population Bool Relation [Pair] -- True indicates declaration

deriving Show

data Context = Context (Maybe Token) [PatElem] deriving Show