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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/xmerl/src/xmerl_simple.erl
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The R13B03 release.OTP_R13B03
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% 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.
+%%
+%% %CopyrightEnd%
+%%
+
+
+%% Description : Simple event-based processor (front-end to xmerl_scanner)
+
+
+-module(xmerl_simple).
+
+-export([file/2,
+ string/2]).
+
+-include("xmerl.hrl").
+
+-record(state, {content_acc = [],
+ attr_acc = [],
+ content_stack = [],
+ attr_stack = []}).
+
+file(Fname, Opts) ->
+ Opts1 = scanner_options(Opts),
+ xmerl_scan:file(Fname, Opts1).
+
+string(Str, Opts) ->
+ Opts1 = scanner_options(Opts),
+ xmerl_scan:string(Str, Opts1).
+
+scanner_options(Opts) ->
+ EventS = #state{},
+ scanner_options(Opts,
+ [{event_fun, fun event/2, EventS},
+ {acc_fun, fun(_, Acc, S) -> {Acc,S} end},
+ {close_fun, fun close/1}]).
+
+scanner_options([H|T], Opts) ->
+ case catch keyreplace(H, 1, Opts) of
+ false ->
+ scanner_options(T, [H|Opts]);
+ NewOpts ->
+ scanner_options(T, NewOpts)
+ end;
+scanner_options([], Opts) ->
+ Opts.
+
+keyreplace(X, Pos, [H|T]) when element(Pos, X) == element(Pos, H) ->
+ [X|T];
+keyreplace(X, Pos, [H|T]) ->
+ [H|keyreplace(X, Pos, T)];
+keyreplace(_X, _Pos, []) ->
+ throw(false).
+
+
+close(S) ->
+ ES = xmerl_scan:event_state(S),
+ #state{attr_stack = [],
+ content_stack = [],
+ %% attr_acc may contain document attributes
+ content_acc = Content} = ES,
+ lists:reverse(Content).
+
+event(#xmerl_event{event = started, data = #xmlElement{}}, S) ->
+ #state{content_acc = CAcc,
+ attr_acc = AAcc,
+ content_stack = CSt,
+ attr_stack = ASt} = ES = xmerl_scan:event_state(S),
+ xmerl_scan:event_state(ES#state{content_acc = [],
+ attr_acc = [],
+ content_stack = [CAcc | CSt],
+ attr_stack = [AAcc | ASt]}, S);
+
+event(#xmerl_event{event = ended, data = #xmlElement{name = Name}}, S) ->
+ #state{content_acc = CAcc,
+ attr_acc = AAcc,
+ content_stack = [PrevCAcc | CSt],
+ attr_stack = [PrevAAcc | ASt]} = ES = xmerl_scan:event_state(S),
+ Simple = {Name, lists:reverse(AAcc), lists:reverse(CAcc)},
+ xmerl_scan:event_state(ES#state{content_acc = [Simple|PrevCAcc],
+ attr_acc = PrevAAcc,
+ content_stack = CSt,
+ attr_stack = ASt}, S);
+
+event(#xmerl_event{event = ended, data = #xmlAttribute{name = Name,
+ value = Value}}, S) ->
+ #state{attr_acc = AAcc} = ES = xmerl_scan:event_state(S),
+ Simple = {Name, Value},
+ xmerl_scan:event_state(ES#state{attr_acc = [Simple|AAcc]}, S);
+
+event(#xmerl_event{event = ended, data = #xmlText{value = Text}}, S) ->
+ #state{content_acc = CAcc} = ES = xmerl_scan:event_state(S),
+ xmerl_scan:event_state(ES#state{content_acc = [Text|CAcc]}, S);
+
+event(_E, S) ->
+ S.