2 Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef LIBCXML_CXML_H
21 #define LIBCXML_CXML_H
23 #include <boost/shared_ptr.hpp>
24 #include <boost/optional.hpp>
25 #include <boost/filesystem.hpp>
26 #include <boost/algorithm/string/erase.hpp>
32 /* Hack for OS X compile failure; see https://bugs.launchpad.net/hugin/+bug/910160 */
44 /** @brief An error */
45 class Error : public std::exception
48 /** Construct an Error exception.
49 * @param message Error message.
51 Error (std::string const & message) : _message (message) {}
53 /** Error destructor */
56 /** @return error message. Caller must not free the returned
59 char const * what () const throw () {
60 return _message.c_str ();
68 /** @brief A wrapper for a xmlpp::Node which simplifies parsing */
74 /** Construct a Node from an xmlpp::Node. This class will
75 * not destroy the xmlpp::Node.
76 * @param node xmlpp::Node.
78 Node (xmlpp::Node* node);
80 std::string name () const;
82 /* A set of methods which look up a child of this node by
83 * its name, and return its contents as some type or other.
85 * If, for example, this object has been created with
86 * a node named "Fred", we might have the following XML:
92 * string_child ("Jim") would return "42"
93 * number_child<int64_t> ("Jim") would return 42.
96 * The methods not marked "optional" will throw an exception
97 * if the child node is not present. The "optional" methods
98 * will return an empty boost::optional<> in that case.
100 * All methods will also throw an exception if there is more
101 * than one of the specified child node.
104 std::string string_child (std::string c) const;
105 boost::optional<std::string> optional_string_child (std::string) const;
107 bool bool_child (std::string) const;
108 boost::optional<bool> optional_bool_child (std::string) const;
111 T number_child (std::string c) const
113 std::string s = string_child (c);
114 boost::erase_all (s, " ");
116 t.imbue (std::locale::classic ());
124 boost::optional<T> optional_number_child (std::string c) const
126 boost::optional<std::string> s = optional_string_child (c);
128 return boost::optional<T> ();
131 std::string t = s.get ();
132 boost::erase_all (t, " ");
134 u.imbue (std::locale::classic ());
141 /** This will mark a child as to be ignored when calling done() */
142 void ignore_child (std::string) const;
144 /** Check whether all children of this Node have been looked up
145 * or passed to ignore_child(). If not, an exception is thrown.
149 /* These methods look for an attribute of this node, in the
150 * same way as the child methods do.
153 std::string string_attribute (std::string) const;
154 boost::optional<std::string> optional_string_attribute (std::string) const;
156 bool bool_attribute (std::string) const;
157 boost::optional<bool> optional_bool_attribute (std::string) const;
160 T number_attribute (std::string c) const
162 std::string s = string_attribute (c);
163 boost::erase_all (s, " ");
165 t.imbue (std::locale::classic ());
173 boost::optional<T> optional_number_attribute (std::string c) const
175 boost::optional<std::string> s = optional_string_attribute (c);
177 return boost::optional<T> ();
180 std::string t = s.get ();
181 boost::erase_all (t, " ");
183 u.imbue (std::locale::classic ());
190 /** @return The content of this node */
191 std::string content () const;
193 /** @return namespace URI of this node */
194 std::string namespace_uri () const;
196 /** @return namespace prefix of this node */
197 std::string namespace_prefix () const;
199 boost::shared_ptr<Node> node_child (std::string) const;
200 boost::shared_ptr<Node> optional_node_child (std::string) const;
202 std::list<boost::shared_ptr<Node> > node_children (std::string) const;
204 xmlpp::Node* node () const {
212 mutable std::list<std::string> _taken;
215 typedef boost::shared_ptr<cxml::Node> NodePtr;
216 typedef boost::shared_ptr<const cxml::Node> ConstNodePtr;
218 class Document : public Node
222 Document (std::string root_name);
223 Document (std::string root_name, boost::filesystem::path);
225 virtual ~Document ();
227 void read_file (boost::filesystem::path);
228 void read_stream (std::istream &);
229 void read_string (std::string);
231 std::string root_name () const {
236 void take_root_node ();
238 xmlpp::DomParser* _parser;
239 std::string _root_name;