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77 lines
2.7 KiB
OCaml
77 lines
2.7 KiB
OCaml
(* JSON parser
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* Copyright (C) 2015-2019 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Std_utils
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open Tools_utils
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open Common_gettext.Gettext
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external json_parser_tree_parse : string -> JSON.json_t = "virt_builder_json_parser_tree_parse"
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external json_parser_tree_parse_file : string -> JSON.json_t = "virt_builder_json_parser_tree_parse_file"
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let object_find_optional key = function
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| JSON.Dict fields ->
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(match List.filter (fun (k, _) -> k = key) fields with
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| [(k, v)] -> Some v
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| [] -> None
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| _ -> error (f_"more than value for the key ‘%s’") key)
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| _ -> error (f_"the value of the key ‘%s’ is not an object") key
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let object_find key yv =
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match object_find_optional key yv with
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| None -> error (f_"missing value for the key ‘%s’") key
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| Some v -> v
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let object_get_string key yv =
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match object_find key yv with
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| JSON.String s -> s
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| _ -> error (f_"the value for the key ‘%s’ is not a string") key
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let object_find_object key yv =
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match object_find key yv with
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| JSON.Dict _ as o -> o
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| _ -> error (f_"the value for the key ‘%s’ is not an object") key
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let object_find_objects fn = function
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| JSON.Dict fields -> List.filter_map fn fields
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| _ -> error (f_"the value is not an object")
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let object_get_object key yv =
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match object_find_object key yv with
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| JSON.Dict fields -> fields
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| _ -> assert false (* object_find_object already errors out. *)
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let object_get_number key yv =
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match object_find key yv with
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| JSON.Int n -> n
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| JSON.Float f -> Int64.of_float f
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| _ -> error (f_"the value for the key ‘%s’ is not an integer") key
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let objects_get_string key yvs =
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let rec loop = function
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| [] -> None
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| x :: xs ->
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(match object_find_optional key x with
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| Some (JSON.String s) -> Some s
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| Some _ -> error (f_"the value for key ‘%s’ is not a string as expected") key
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| None -> loop xs
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)
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in
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match loop yvs with
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| Some s -> s
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| None -> error (f_"the key ‘%s’ was not found in a list of objects") key
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