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%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (the "License"); you may not use this file except in
%% compliance with the License. You may obtain a copy of the License
%% at http://www.mozilla.org/MPL/
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and
%% limitations under the License.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developer of the Original Code is GoPivotal, Inc.
%% Copyright (c) 2007-2013 GoPivotal, Inc. All rights reserved.
%%
-module(rabbit_queue_arguments).
-include("rabbit.hrl").
-export([select/1]).
%% TODO: docs
-ifdef(use_specs).
-type(validator_fun() :: fun((any(), rabbit_framing:amqp_table()) ->
rabbit_types:ok_or_error({atom(), any()}))).
-type(argument() :: {binary(), validator_fun()}).
-type(argument_set() :: 'declare_args' |
'consume_args').
-callback description() -> [proplists:property()].
-callback arguments(argument_set()) -> [argument()].
-callback applies_to(argument_set()) -> boolean().
-else.
-export([behaviour_info/1]).
behaviour_info(callbacks) ->
[{description, 0}, {arguments, 1}, {applies_to, 1}];
behaviour_info(_Other) ->
undefined.
-endif.
%%----------------------------------------------------------------------------
%% select the interceptors that apply to intercept_method().
select(Method) -> [QA || QA <- filter(list()), QA:applies_to(Method)].
filter(Modules) ->
[M || M <- Modules, code:which(M) =/= non_existing].
list() -> [M || {_, M} <- rabbit_registry:lookup_all(queue_arguments)].
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