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-rwxr-xr-xlib/common_test/src/ct_config_xml.erl39
1 files changed, 25 insertions, 14 deletions
diff --git a/lib/common_test/src/ct_config_xml.erl b/lib/common_test/src/ct_config_xml.erl
index ef991123f3..79f25cead7 100755
--- a/lib/common_test/src/ct_config_xml.erl
+++ b/lib/common_test/src/ct_config_xml.erl
@@ -22,8 +22,9 @@
%% Created : 16 February 2010
%%----------------------------------------------------------------------
-module(ct_config_xml).
--export([read_config_file/1, list_to_term/1]).
+-export([read_config_file/1]).
+% the only function to be called outside
read_config_file(ConfigFile) ->
case catch do_read_xml_config(ConfigFile) of
{ok, Config}->
@@ -32,49 +33,57 @@ read_config_file(ConfigFile) ->
{error, Error, ErroneousString}
end.
+% actual reading of the config
do_read_xml_config(ConfigFile)->
{ok, EntityList, _}=
xmerl_sax_parser:file(ConfigFile,
[{event_fun, fun event/3},
- {event_state, initial_state()}]),
+ {event_state, []}]),
{ok, transform_entity_list(EntityList)}.
-
-initial_state() ->
- [].
-
+% event callback for xmerl_sax_parser
event(Event, _LineNo, State) ->
tag(Event, State).
+% document start
tag(startDocument, State) ->
State;
-tag(endDocument, {_Tags, Result}) ->
- Result;
-
+% start of the config
tag({startElement, _Uri, "config", _QName, _Attributes}, []) ->
[{"config", []}];
-tag({endElement, _Uri, "config", _QName}, [{"config", Config}]) ->
- Config;
-
+% start tag
tag({startElement, _Uri, Name, _QName, _Attributes}, Tags) ->
[{Name, []}|Tags];
+% value
+tag({characters, String}, [{Tag, _Value}|Tags]) ->
+ [{Tag, String}|Tags];
+
+% end tag
tag({endElement, _Uri, _Name, _QName},
[Entity, {PrevEntityTag, PrevEntityValue}|Tags]) ->
NewHead = {PrevEntityTag, [Entity|PrevEntityValue]},
[NewHead|Tags];
-tag({characters, String}, [{Tag, _Value}|Tags]) ->
- [{Tag, String}|Tags];
+% end of the config
+tag({endElement, _Uri, "config", _QName}, [{"config", Config}]) ->
+ Config;
+
+% end of document, return result
+tag(endDocument, {_Tags, Result}) ->
+ Result;
+% default
tag(_El, State) ->
State.
+% transform of the ugly deeply nested entity list to the key-value "tree"
transform_entity_list(EntityList)->
lists:map(fun transform_entity/1, EntityList).
+% transform entity from {list(), list()} to {atom(), term()}
transform_entity({Tag, [Value|Rest]}) when
is_tuple(Value)->
{list_to_atom(Tag), transform_entity_list([Value|Rest])};
@@ -86,6 +95,8 @@ transform_entity({Tag, String})->
throw(Error)
end.
+% transform a string with Erlang terms to the terms
+% stolen from trapexit.org :-)
list_to_term(String) ->
{ok, T, _} = erl_scan:string(String++"."),
case erl_parse:parse_term(T) of