1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
{-# Language TypeSynonymInstances #-}
{-# Language FlexibleInstances #-}
{-# Language OverlappingInstances #-}
{-# Language IncoherentInstances #-}
{-# Language DeriveDataTypeable #-}
--------------------------------------------------------------------
-- |
-- Module : Data.MessagePack.Object
-- Copyright : (c) Hideyuki Tanaka, 2009-2010
-- License : BSD3
--
-- Maintainer: tanaka.hideyuki@gmail.com
-- Stability : experimental
-- Portability: portable
--
-- MessagePack object definition
--
--------------------------------------------------------------------
module Data.MessagePack.Object(
-- * MessagePack Object
Object(..),
-- * Serialization to and from Object
OBJECT(..),
-- Result,
) where
import Control.DeepSeq
import Control.Exception
import Control.Monad
import Control.Monad.Trans.Error ()
import qualified Data.Attoparsec as A
import qualified Data.ByteString as B
import qualified Data.ByteString.Char8 as C8
import Data.Typeable
import Data.MessagePack.Pack
import Data.MessagePack.Unpack
-- | Object Representation of MessagePack data.
data Object =
ObjectNil
| ObjectBool Bool
| ObjectInteger Int
| ObjectDouble Double
| ObjectRAW B.ByteString
| ObjectArray [Object]
| ObjectMap [(Object, Object)]
deriving (Show, Eq, Ord, Typeable)
instance NFData Object where
rnf obj =
case obj of
ObjectNil -> ()
ObjectBool b -> rnf b
ObjectInteger n -> rnf n
ObjectDouble d -> rnf d
ObjectRAW bs -> bs `seq` ()
ObjectArray a -> rnf a
ObjectMap m -> rnf m
instance Unpackable Object where
get =
A.choice
[ liftM ObjectInteger get
, liftM (\() -> ObjectNil) get
, liftM ObjectBool get
, liftM ObjectDouble get
, liftM ObjectRAW get
, liftM ObjectArray get
, liftM ObjectMap get
]
instance Packable Object where
put obj =
case obj of
ObjectInteger n ->
put n
ObjectNil ->
put ()
ObjectBool b ->
put b
ObjectDouble d ->
put d
ObjectRAW raw ->
put raw
ObjectArray arr ->
put arr
ObjectMap m ->
put m
-- | The class of types serializable to and from MessagePack object
class (Unpackable a, Packable a) => OBJECT a where
-- | Encode a value to MessagePack object
toObject :: a -> Object
toObject = unpack . pack
-- | Decode a value from MessagePack object
fromObject :: Object -> a
fromObject a =
case tryFromObject a of
Left err ->
throw $ UnpackError err
Right ret ->
ret
-- | Decode a value from MessagePack object
tryFromObject :: Object -> Either String a
tryFromObject = tryUnpack . pack
instance OBJECT Object where
toObject = id
tryFromObject = Right
tryFromObjectError :: Either String a
tryFromObjectError = Left "tryFromObject: cannot cast"
instance OBJECT () where
toObject = const ObjectNil
tryFromObject ObjectNil = Right ()
tryFromObject _ = tryFromObjectError
instance OBJECT Int where
toObject = ObjectInteger
tryFromObject (ObjectInteger n) = Right n
tryFromObject _ = tryFromObjectError
instance OBJECT Bool where
toObject = ObjectBool
tryFromObject (ObjectBool b) = Right b
tryFromObject _ = tryFromObjectError
instance OBJECT Double where
toObject = ObjectDouble
tryFromObject (ObjectDouble d) = Right d
tryFromObject _ = tryFromObjectError
instance OBJECT B.ByteString where
toObject = ObjectRAW
tryFromObject (ObjectRAW bs) = Right bs
tryFromObject _ = tryFromObjectError
instance OBJECT String where
toObject = toObject . C8.pack
tryFromObject obj = liftM C8.unpack $ tryFromObject obj
instance OBJECT a => OBJECT [a] where
toObject = ObjectArray . map toObject
tryFromObject (ObjectArray arr) =
mapM tryFromObject arr
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2) => OBJECT (a1, a2) where
toObject (a1, a2) = ObjectArray [toObject a1, toObject a2]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
return (v1, v2)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3) => OBJECT (a1, a2, a3) where
toObject (a1, a2, a3) = ObjectArray [toObject a1, toObject a2, toObject a3]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
return (v1, v2, v3)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4) => OBJECT (a1, a2, a3, a4) where
toObject (a1, a2, a3, a4) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
return (v1, v2, v3, v4)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4, OBJECT a5) => OBJECT (a1, a2, a3, a4, a5) where
toObject (a1, a2, a3, a4, a5) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4, toObject a5]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4, o5] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
v5 <- tryFromObject o5
return (v1, v2, v3, v4, v5)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4, OBJECT a5, OBJECT a6) => OBJECT (a1, a2, a3, a4, a5, a6) where
toObject (a1, a2, a3, a4, a5, a6) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4, toObject a5, toObject a6]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4, o5, o6] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
v5 <- tryFromObject o5
v6 <- tryFromObject o6
return (v1, v2, v3, v4, v5, v6)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4, OBJECT a5, OBJECT a6, OBJECT a7) => OBJECT (a1, a2, a3, a4, a5, a6, a7) where
toObject (a1, a2, a3, a4, a5, a6, a7) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4, toObject a5, toObject a6, toObject a7]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4, o5, o6, o7] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
v5 <- tryFromObject o5
v6 <- tryFromObject o6
v7 <- tryFromObject o7
return (v1, v2, v3, v4, v5, v6, v7)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4, OBJECT a5, OBJECT a6, OBJECT a7, OBJECT a8) => OBJECT (a1, a2, a3, a4, a5, a6, a7, a8) where
toObject (a1, a2, a3, a4, a5, a6, a7, a8) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4, toObject a5, toObject a6, toObject a7, toObject a8]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4, o5, o6, o7, o8] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
v5 <- tryFromObject o5
v6 <- tryFromObject o6
v7 <- tryFromObject o7
v8 <- tryFromObject o8
return (v1, v2, v3, v4, v5, v6, v7, v8)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a1, OBJECT a2, OBJECT a3, OBJECT a4, OBJECT a5, OBJECT a6, OBJECT a7, OBJECT a8, OBJECT a9) => OBJECT (a1, a2, a3, a4, a5, a6, a7, a8, a9) where
toObject (a1, a2, a3, a4, a5, a6, a7, a8, a9) = ObjectArray [toObject a1, toObject a2, toObject a3, toObject a4, toObject a5, toObject a6, toObject a7, toObject a8, toObject a9]
tryFromObject (ObjectArray arr) =
case arr of
[o1, o2, o3, o4, o5, o6, o7, o8, o9] -> do
v1 <- tryFromObject o1
v2 <- tryFromObject o2
v3 <- tryFromObject o3
v4 <- tryFromObject o4
v5 <- tryFromObject o5
v6 <- tryFromObject o6
v7 <- tryFromObject o7
v8 <- tryFromObject o8
v9 <- tryFromObject o9
return (v1, v2, v3, v4, v5, v6, v7, v8, v9)
_ ->
tryFromObjectError
tryFromObject _ =
tryFromObjectError
instance (OBJECT a, OBJECT b) => OBJECT [(a, b)] where
toObject =
ObjectMap . map (\(a, b) -> (toObject a, toObject b))
tryFromObject (ObjectMap mem) = do
mapM (\(a, b) -> liftM2 (,) (tryFromObject a) (tryFromObject b)) mem
tryFromObject _ =
tryFromObjectError
instance OBJECT a => OBJECT (Maybe a) where
toObject (Just a) = toObject a
toObject Nothing = ObjectNil
tryFromObject ObjectNil = return Nothing
tryFromObject obj = liftM Just $ tryFromObject obj
|
