Legend:
Page
Library
Module
Module type
Parameter
Class
Class type
Source
Page
Library
Module
Module type
Parameter
Class
Class type
Source
talon_json.ml
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325
open Talon open Yojson.Basic (* Helper to convert a column value to JSON *) let value_to_json col idx = match col with | Col.P (dtype, tensor, _) -> ( match dtype with | Nx.Float32 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.Float64 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.Float16 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.BFloat16 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.Int8 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.UInt8 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.Int16 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.UInt16 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.Int32 -> let arr : int32 array = Nx.to_array tensor in `Int (Int32.to_int arr.(idx)) | Nx.Int64 -> let arr : int64 array = Nx.to_array tensor in `String (Int64.to_string arr.(idx)) | Nx.Int -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.NativeInt -> let arr : nativeint array = Nx.to_array tensor in `String (Nativeint.to_string arr.(idx)) | Nx.Complex32 -> let arr : Complex.t array = Nx.to_array tensor in let c = arr.(idx) in `String (Printf.sprintf "%g+%gi" c.re c.im) | Nx.Complex64 -> let arr : Complex.t array = Nx.to_array tensor in let c = arr.(idx) in `String (Printf.sprintf "%g+%gi" c.re c.im) | Nx.Bool -> let arr : bool array = Nx.to_array tensor in `Bool arr.(idx) | Nx.Int4 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.UInt4 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.Float8_e4m3 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.Float8_e5m2 -> let arr : float array = Nx.to_array tensor in let value = arr.(idx) in if classify_float value = FP_nan then `Null else `Float value | Nx.Complex16 -> let arr : Complex.t array = Nx.to_array tensor in let c = arr.(idx) in `String (Printf.sprintf "%g+%gi" c.re c.im) | Nx.QInt8 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx) | Nx.QUInt8 -> let arr : int array = Nx.to_array tensor in `Int arr.(idx)) | Col.S arr -> ( match arr.(idx) with Some s -> `String s | None -> `Null) | Col.B arr -> ( match arr.(idx) with Some b -> `Bool b | None -> `Null) let to_string ?(orient = `Records) df = let n_rows = num_rows df in let col_names = column_names df in match orient with | `Records -> (* Row-oriented: list of objects *) let records = List.init n_rows (fun i -> let fields = List.map (fun col_name -> let col = get_column_exn df col_name in (col_name, value_to_json col i)) col_names in `Assoc fields) in to_string (`List records) | `Columns -> (* Column-oriented: object with column arrays *) let columns = List.map (fun col_name -> let col = get_column_exn df col_name in let values = List.init n_rows (fun i -> value_to_json col i) in (col_name, `List values)) col_names in to_string (`Assoc columns) (* Helper to detect column type from JSON values *) let detect_json_dtype values = let non_null_values = List.filter (fun v -> v <> `Null) values in if List.length non_null_values = 0 then `String (* Default to string for all-null columns *) else (* Check types of non-null values *) let all_bool = List.for_all (function `Bool _ -> true | _ -> false) non_null_values in let all_int = List.for_all (function `Int _ -> true | _ -> false) non_null_values in let all_float = List.for_all (function `Float _ | `Int _ -> true | _ -> false) non_null_values in if all_bool then `Bool else if all_int then `Int32 else if all_float then `Float32 else `String let from_string ?(orient = `Records) json_str = let json = from_string json_str in match orient with | `Records -> ( (* Row-oriented: expect list of objects *) match json with | `List records -> if List.length records = 0 then empty else (* Get column names from first record *) let col_names = match List.hd records with | `Assoc fields -> List.map fst fields | _ -> failwith "Invalid JSON: expected object in records array" in (* Extract values for each column *) let columns_data = List.map (fun col_name -> let values = List.map (function | `Assoc fields -> ( try List.assoc col_name fields with Not_found -> `Null) | _ -> `Null) records in (col_name, values)) col_names in (* Create columns based on detected types *) let columns = List.map (fun (col_name, values) -> let dtype = detect_json_dtype values in let column = match dtype with | `Float32 -> let arr = List.map (function | `Null -> None | `Float f -> Some f | `Int i -> Some (float_of_int i) | _ -> None) values |> Array.of_list in Col.float32_opt arr | `Int32 -> let arr = List.map (function | `Null -> None | `Int i -> Some (Int32.of_int i) | _ -> None) values |> Array.of_list in Col.int32_opt arr | `Bool -> let arr = List.map (function | `Null -> None | `Bool b -> Some b | _ -> None) values |> Array.of_list in Col.bool_opt arr | _ -> (* String or mixed types *) let arr = List.map (function | `Null -> None | `String s -> Some s | `Int i -> Some (string_of_int i) | `Float f -> Some (string_of_float f) | `Bool b -> Some (string_of_bool b) | _ -> None) values |> Array.of_list in Col.string_opt arr in (col_name, column)) columns_data in create columns | _ -> failwith "Invalid JSON: expected array for records orientation") | `Columns -> ( (* Column-oriented: expect object with column arrays *) match json with | `Assoc fields -> if List.length fields = 0 then empty else let columns = List.map (fun (col_name, values) -> match values with | `List vals -> let dtype = detect_json_dtype vals in let column = match dtype with | `Float32 -> let arr = List.map (function | `Null -> None | `Float f -> Some f | `Int i -> Some (float_of_int i) | _ -> None) vals |> Array.of_list in Col.float32_opt arr | `Int32 -> let arr = List.map (function | `Null -> None | `Int i -> Some (Int32.of_int i) | _ -> None) vals |> Array.of_list in Col.int32_opt arr | `Bool -> let arr = List.map (function | `Null -> None | `Bool b -> Some b | _ -> None) vals |> Array.of_list in Col.bool_opt arr | _ -> (* String or mixed types *) let arr = List.map (function | `Null -> None | `String s -> Some s | `Int i -> Some (string_of_int i) | `Float f -> Some (string_of_float f) | `Bool b -> Some (string_of_bool b) | _ -> None) vals |> Array.of_list in Col.string_opt arr in (col_name, column) | _ -> failwith (Printf.sprintf "Invalid JSON: column %s is not an array" col_name)) fields in create columns | _ -> failwith "Invalid JSON: expected object for columns orientation") let to_file ?orient df file = let json_string = to_string ?orient df in let oc = open_out file in output_string oc json_string; close_out oc let from_file ?orient file = let ic = open_in file in let contents = really_input_string ic (in_channel_length ic) in close_in ic; from_string ?orient contents