151 lines
No EOL
5 KiB
Erlang
151 lines
No EOL
5 KiB
Erlang
%% The MIT License
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%% Copyright (c) 2011 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
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%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%% of this software and associated documentation files (the "Software"), to deal
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%% in the Software without restriction, including without limitation the rights
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%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%% copies of the Software, and to permit persons to whom the Software is
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%% furnished to do so, subject to the following conditions:
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%% The above copyright notice and this permission notice shall be included in
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%% all copies or substantial portions of the Software.
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%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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-module(jsx_encoder).
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-export([encoder/3, pre_encode/2]).
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-spec encoder(Handler::module(), State::any(), Config::jsx:config()) -> jsx:encoder().
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encoder(Handler, State, Config) ->
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fun(JSON) ->
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start(
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JSON,
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{Handler, Handler:init(State)},
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jsx_utils:parse_config(Config)
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)
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end.
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-include("jsx_config.hrl").
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-ifndef(error).
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-define(error(Args),
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erlang:error(badarg, Args)
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).
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-endif.
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start(Term, {Handler, State}, Config) ->
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Handler:handle_event(end_json, value(pre_encode(Term, Config), {Handler, State}, Config)).
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value(String, {Handler, State}, Config) when is_binary(String) ->
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Handler:handle_event({string, clean_string(String, Config)}, State);
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value(Float, {Handler, State}, _Config) when is_float(Float) ->
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Handler:handle_event({float, Float}, State);
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value(Int, {Handler, State}, _Config) when is_integer(Int) ->
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Handler:handle_event({integer, Int}, State);
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value(Literal, {Handler, State}, _Config)
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when Literal == true; Literal == false; Literal == null ->
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Handler:handle_event({literal, Literal}, State);
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value([{}], {Handler, State}, _Config) ->
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Handler:handle_event(end_object, Handler:handle_event(start_object, State));
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value([], {Handler, State}, _Config) ->
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Handler:handle_event(end_array, Handler:handle_event(start_array, State));
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value([Tuple|_] = List, Handler, Config) when is_tuple(Tuple) ->
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list_or_object(List, Handler, Config);
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value(List, Handler, Config) when is_list(List) ->
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list_or_object(List, Handler, Config);
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value(Term, Handler, Config) -> ?error([Term, Handler, Config]).
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list_or_object([Term|Rest], {Handler, State}, Config) ->
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case pre_encode(Term, Config) of
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{K, V} ->
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object([{K, V}|Rest], {Handler, Handler:handle_event(start_object, State)}, Config)
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; T ->
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list([T|Rest], {Handler, Handler:handle_event(start_array, State)}, Config)
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end.
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object([{Key, Value}, Next|Rest], {Handler, State}, Config) when is_atom(Key); is_binary(Key) ->
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V = pre_encode(Value, Config),
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object(
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[pre_encode(Next, Config)|Rest],
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{
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Handler,
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value(
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V,
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{Handler, Handler:handle_event({key, clean_string(fix_key(Key), Config)}, State)},
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Config
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)
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},
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Config
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);
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object([{Key, Value}], {Handler, State}, Config) when is_atom(Key); is_binary(Key) ->
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object(
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[],
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{
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Handler,
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value(
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pre_encode(Value, Config),
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{Handler, Handler:handle_event({key, clean_string(fix_key(Key), Config)}, State)},
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Config
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)
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},
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Config
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);
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object([], {Handler, State}, _Config) -> Handler:handle_event(end_object, State);
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object(Term, Handler, Config) -> ?error([Term, Handler, Config]).
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list([Value, Next|Rest], {Handler, State}, Config) ->
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list([pre_encode(Next, Config)|Rest], {Handler, value(Value, {Handler, State}, Config)}, Config);
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list([Value], {Handler, State}, Config) ->
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list([], {Handler, value(Value, {Handler, State}, Config)}, Config);
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list([], {Handler, State}, _Config) -> Handler:handle_event(end_array, State);
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list(Term, Handler, Config) -> ?error([Term, Handler, Config]).
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pre_encode(Value, #config{pre_encode=false}) -> io:format("~p~n", [Value]), Value;
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pre_encode(Value, Config) -> (Config#config.pre_encode)(Value).
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fix_key(Key) when is_atom(Key) -> fix_key(atom_to_binary(Key, utf8));
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fix_key(Key) when is_binary(Key) -> Key.
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clean_string(Bin, Config) -> jsx_utils:clean_string(Bin, Config).
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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encode_test_() ->
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Data = jsx:universals(),
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[
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{
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Title, ?_assertEqual(
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Events ++ [end_json],
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start(Term, {jsx, []}, #config{})
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)
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} || {Title, _, Term, Events} <- Data
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].
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-endif. |