2 module Java.ClassPath.Common where
5 import Data.String.Utils (split)
7 import Java.ClassPath.Types
9 mapF :: (t -> a) -> [Tree t] -> [Tree a]
10 mapF fn forest = map (mapT fn) forest
12 mapFM fn forest = mapM (mapTM fn) forest
14 mapTM fn (Directory dir forest) = Directory dir `fmap` mapFM fn forest
15 mapTM fn (File a) = File `fmap` fn a
17 mapT :: (t -> a) -> Tree t -> Tree a
18 mapT fn (Directory dir forest) = Directory dir (mapF fn forest)
19 mapT fn (File a) = File (fn a)
21 buildTree :: [FilePath] -> [Tree FilePath]
23 let build :: [[String]] -> [Tree FilePath]
24 build [[name]] = [File name]
25 build ss = map node $ groupBy eq (sort ss)
27 node [] = error "Impossible: groupBy give an empty group!"
29 node l | all (null . tail) l = File (head $ head l)
30 | otherwise = Directory (head $ head l) (build $ map tail l)
32 ls = map (split "/") strs
35 eq (x:_) (y:_) = x == y
39 merge :: [Tree CPEntry] -> [Tree CPEntry]
41 merge [t1,t2] = merge1 [t1] t2
42 merge (t:ts) = foldl merge1 [t] ts
44 merge1 :: [Tree CPEntry] -> Tree CPEntry -> [Tree CPEntry]
46 merge1 (x@(File e): es) y@(File e') | e == e' = x: es
47 | otherwise = x: merge1 es y
48 merge1 (d@(Directory _ _):es) f@(File _) = d: merge1 es f
49 merge1 (x@(Directory dir f):es) y@(Directory dir' f')
50 | dir == dir' = Directory dir (merge $ f ++ f'): es
51 | otherwise = x: merge1 es y