%%-*-erlang-*-
%%--------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 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%
%%----------------------------------------------------------------------
%% File : xmerl_sax_old_dom.erl
%% Description :
%%
%% Created : 02 Oct 2008
%%----------------------------------------------------------------------
-module(xmerl_sax_old_dom).
%%----------------------------------------------------------------------
%% Include files
%%----------------------------------------------------------------------
-include("xmerl_sax_old_dom.hrl").
%%----------------------------------------------------------------------
%% External exports
%%----------------------------------------------------------------------
-export([
initial_state/0,
get_dom/1,
event/3
]).
%%----------------------------------------------------------------------
%% Internal exports
%%----------------------------------------------------------------------
-export([
]).
%%======================================================================
%% Macros
%%======================================================================
%%----------------------------------------------------------------------
%% Error handling
%%----------------------------------------------------------------------
-define(error(Reason),
throw({xmerl_sax_old_dom_error, Reason})).
%%======================================================================
%% Records
%%======================================================================
%%----------------------------------------------------------------------
%% State record for the validator
%%----------------------------------------------------------------------
-record(xmerl_sax_old_dom_state, {
tags=[], %% Tag stack
cno=[], %% Current node number
namespaces = [], %% NameSpace stack
dom=[] %% DOM structure
}).
%%======================================================================
%% External functions
%%======================================================================
%%----------------------------------------------------------------------
%% Function: initial_state() -> Result
%% Parameters:
%% Result:
%% Description:
%%----------------------------------------------------------------------
initial_state() ->
#xmerl_sax_old_dom_state{}.
%%----------------------------------------------------------------------
%% Function: get_dom(State) -> Result
%% Parameters:
%% Result:
%% Description:
%%----------------------------------------------------------------------
get_dom(#xmerl_sax_old_dom_state{dom=Dom}) ->
Dom.
%%----------------------------------------------------------------------
%% Function: event(Event, LineNo, State) -> Result
%% Parameters:
%% Result:
%% Description:
%%----------------------------------------------------------------------
event(Event, _LineNo, State) ->
build_dom(Event, State).
%%======================================================================
%% Internal functions
%%======================================================================
%%----------------------------------------------------------------------
%% Function : build_dom(Event, State) -> Result
%% Parameters: Event = term()
%% State = #xmerl_sax_old_dom_state{}
%% Result : #xmerl_sax_old_dom_state{} |
%% Description:
%%----------------------------------------------------------------------
%% Document
%%----------------------------------------------------------------------
build_dom(startDocument, State) ->
State#xmerl_sax_old_dom_state{dom=[startDocument]};
build_dom(endDocument,
#xmerl_sax_old_dom_state{dom=[#xmlElement{content=C} = Current |D]} = State) ->
case D of
[startDocument] ->
State#xmerl_sax_old_dom_state{dom=[Current#xmlElement{
content=lists:reverse(C)
}]};
[#xmlDecl{} = Decl, startDocument] ->
State#xmerl_sax_old_dom_state{dom=[Decl, Current#xmlElement{
content=lists:reverse(C)
}]};
_ ->
io:format("~p\n", [D]),
?error("we're not at end the document when endDocument event is encountered.")
end;
%% Element
%%----------------------------------------------------------------------
build_dom({startElement, Uri, LocalName, QName, Attributes},
#xmerl_sax_old_dom_state{tags=T, cno=CN, namespaces=NS, dom=D} = State) ->
A = parse_attributes(LocalName, Attributes),
{Num, NewCN} =
case CN of
[] ->
{1, [1]};
[ N |CNs] ->
{N, [1, N+1 |CNs]}
end,
NsInfo =
case QName of
{[], _} -> [];
QN -> QN
end,
NameAsAtom = convert_qname_to_atom(QName),
State#xmerl_sax_old_dom_state{tags=[{NameAsAtom, Num} |T],
cno=NewCN,
dom=[#xmlElement{name=NameAsAtom,
expanded_name=NameAsAtom,
nsinfo=NsInfo,
namespace=#xmlNamespace{default=list_to_atom(Uri),
nodes=NS},
pos=Num,
parents=T,
attributes=lists:reverse(A),
xmlbase="."
} | D]};
build_dom({endElement, _Uri, LocalName, QName},
#xmerl_sax_old_dom_state{tags=[_ |T],
cno=[_ |CN],
dom=[#xmlElement{name=CName, content=C} = Current,
#xmlElement{content=PC} = Parent | D]} = State) ->
case convert_qname_to_atom(QName) of
CName ->
State#xmerl_sax_old_dom_state{tags=T,
cno=CN,
dom=[Parent#xmlElement{
content=[Current#xmlElement{
content=lists:reverse(C)
}
|PC]
} | D]};
_ ->
?error("Got end of element: " ++ LocalName ++ " but expected: " ++
Current#xmlElement.name)
end;
%% Text
%%----------------------------------------------------------------------
build_dom({characters, String},
#xmerl_sax_old_dom_state{tags=T,
cno=[Num |CN],
dom=[#xmlElement{content=C} = Current| D]} = State) ->
State#xmerl_sax_old_dom_state{cno=[Num+1 |CN],
dom=[Current#xmlElement{content=[#xmlText{value=String, parents=T, pos=Num, type=text}
|C]} | D]};
build_dom({ignorableWhitespace, String},
#xmerl_sax_old_dom_state{tags=T,
cno=[Num |CN],
dom=[#xmlElement{content=C} = Current| D]} = State) ->
State#xmerl_sax_old_dom_state{cno=[Num+1 |CN],
dom=[Current#xmlElement{content=[#xmlText{value=String,
parents=T, pos=Num,
type=text}
|C]} | D]};
%% Comments
%%----------------------------------------------------------------------
build_dom({comment, String},
#xmerl_sax_old_dom_state{tags=T,
cno=[Num |CN],
dom=[#xmlElement{content=C} = Current| D]} = State) ->
State#xmerl_sax_old_dom_state{cno=[Num+1 |CN],
dom=[Current#xmlElement{content=[#xmlComment{parents=T, pos=Num, value=String}|C]} | D]};
%% NameSpaces
%%----------------------------------------------------------------------
build_dom({startPrefixMapping, [], _Uri}, State) ->
State;
build_dom({startPrefixMapping, Prefix, Uri},
#xmerl_sax_old_dom_state{namespaces=NS} = State) ->
State#xmerl_sax_old_dom_state{namespaces=[{Prefix, list_to_atom(Uri)} |NS]};
build_dom({endPrefixMapping, Prefix},
#xmerl_sax_old_dom_state{namespaces=[{Prefix, _} |NS]} = State) ->
State#xmerl_sax_old_dom_state{namespaces=NS};
%% Processing instructions
%%----------------------------------------------------------------------
build_dom({processingInstruction,"xml", PiData},
#xmerl_sax_old_dom_state{dom=D} = State) ->
{Vsn, PiData1} = find_and_remove_attribute("version", PiData, []),
{Enc, PiData2} = find_and_remove_attribute("encoding", PiData1, []),
{Standalone, PiData3} = find_and_remove_attribute("standalone", PiData2, yes),
State#xmerl_sax_old_dom_state{dom=[#xmlDecl{vsn=Vsn, encoding=Enc, standalone=Standalone, attributes=PiData3}| D]};
build_dom({processingInstruction, PiTarget, PiData},
#xmerl_sax_old_dom_state{cno=[Num |CN],
dom=[#xmlElement{content=C} = Current| D]} = State) ->
State#xmerl_sax_old_dom_state{cno=[Num+1 |CN],
dom=[Current#xmlElement{content=[#xmlPI{name=PiTarget,pos=Num, value=PiData}
|C]} | D]};
%% Default
%%----------------------------------------------------------------------
build_dom(_E, State) ->
State.
%%----------------------------------------------------------------------
%% Function : parse_attributes(ElName, Attributes) -> Result
%% Parameters:
%% Result :
%% Description:
%%----------------------------------------------------------------------
parse_attributes(ElName, Attributes) ->
parse_attributes(ElName, Attributes, 1, []).
parse_attributes(_, [], _, Acc) ->
Acc;
parse_attributes(ElName, [{_Uri, Prefix, LocalName, AttrValue} |As], N, Acc) ->
Name = convert_qname_to_atom({Prefix,LocalName}),
NsInfo =
case Prefix of
[] -> [];
P -> {P,LocalName}
end,
parse_attributes(ElName, As, N+1, [#xmlAttribute{name=Name,
pos=N,
nsinfo=NsInfo,
value=AttrValue,
normalized=false} |Acc]).
%%----------------------------------------------------------------------
%% Function : convert_qname_to_atom(QName) -> Result
%% Parameters:
%% Result :
%% Description:
%%----------------------------------------------------------------------
convert_qname_to_atom({[], N}) ->
list_to_atom(N);
convert_qname_to_atom({P,N}) ->
list_to_atom(P ++ ":" ++ N).
%%----------------------------------------------------------------------
%% Function : find_and_remove_attribute(Key, Data, Default) -> Result
%% Parameters:
%% Result :
%% Description:
%%----------------------------------------------------------------------
find_and_remove_attribute(Key, Data, Default) ->
case lists:keysearch(Key, 1, Data) of
{value, {Key, Value}} ->
Data2 = lists:keydelete(Key, 1, Data),
{Value, Data2};
false ->
{Default, Data}
end.
