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#include <sstream>
#include <iostream>
#include <boost/lexical_cast.hpp>
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <libxml++/libxml++.h>
#include "cxml.h"
using namespace std;
using namespace boost;
cxml::Node::Node ()
: _node (0)
{
}
cxml::Node::Node (xmlpp::Node const * node)
: _node (node)
{
}
string
cxml::Node::name () const
{
assert (_node);
return _node->get_name ();
}
shared_ptr<cxml::Node>
cxml::Node::node_child (string name) const
{
list<shared_ptr<cxml::Node> > n = node_children (name);
if (n.size() > 1) {
throw cxml::Error ("duplicate XML tag " + name);
} else if (n.empty ()) {
throw cxml::Error ("missing XML tag " + name + " in " + _node->get_name());
}
return n.front ();
}
shared_ptr<cxml::Node>
cxml::Node::optional_node_child (string name) const
{
list<shared_ptr<cxml::Node> > n = node_children (name);
if (n.size() > 1) {
throw cxml::Error ("duplicate XML tag " + name);
} else if (n.empty ()) {
return shared_ptr<cxml::Node> ();
}
return n.front ();
}
list<shared_ptr<cxml::Node> >
cxml::Node::node_children (string name) const
{
/* XXX: using find / get_path should work here, but I can't follow
how get_path works.
*/
xmlpp::Node::NodeList c = _node->get_children ();
list<shared_ptr<cxml::Node> > n;
for (xmlpp::Node::NodeList::iterator i = c.begin (); i != c.end(); ++i) {
if ((*i)->get_name() == name) {
n.push_back (shared_ptr<Node> (new Node (*i)));
}
}
_taken.push_back (name);
return n;
}
string
cxml::Node::string_child (string c) const
{
return node_child(c)->content ();
}
optional<string>
cxml::Node::optional_string_child (string c) const
{
list<shared_ptr<Node> > nodes = node_children (c);
if (nodes.size() > 1) {
throw cxml::Error ("duplicate XML tag " + c);
}
if (nodes.empty ()) {
return optional<string> ();
}
return nodes.front()->content();
}
bool
cxml::Node::bool_child (string c) const
{
string const s = string_child (c);
return (s == "1" || s == "yes");
}
optional<bool>
cxml::Node::optional_bool_child (string c) const
{
optional<string> s = optional_string_child (c);
if (!s) {
return optional<bool> ();
}
return (s.get() == "1" || s.get() == "yes");
}
void
cxml::Node::ignore_child (string name) const
{
_taken.push_back (name);
}
string
cxml::Node::string_attribute (string name) const
{
xmlpp::Element const * e = dynamic_cast<const xmlpp::Element *> (_node);
if (!e) {
throw cxml::Error ("missing attribute");
}
xmlpp::Attribute* a = e->get_attribute (name);
if (!a) {
throw cxml::Error ("missing attribute");
}
return a->get_value ();
}
optional<string>
cxml::Node::optional_string_attribute (string name) const
{
xmlpp::Element const * e = dynamic_cast<const xmlpp::Element *> (_node);
if (!e) {
return optional<string> ();
}
xmlpp::Attribute* a = e->get_attribute (name);
if (!a) {
return optional<string> ();
}
return string (a->get_value ());
}
bool
cxml::Node::bool_attribute (string name) const
{
string const s = string_attribute (name);
return (s == "1" || s == "yes");
}
optional<bool>
cxml::Node::optional_bool_attribute (string name) const
{
optional<string> s = optional_string_attribute (name);
if (!s) {
return optional<bool> ();
}
return (s.get() == "1" || s.get() == "yes");
}
void
cxml::Node::done () const
{
xmlpp::Node::NodeList c = _node->get_children ();
for (xmlpp::Node::NodeList::iterator i = c.begin(); i != c.end(); ++i) {
if (dynamic_cast<xmlpp::Element *> (*i) && find (_taken.begin(), _taken.end(), (*i)->get_name()) == _taken.end ()) {
throw cxml::Error ("unexpected XML node " + (*i)->get_name());
}
}
}
string
cxml::Node::content () const
{
string content;
xmlpp::Node::NodeList c = _node->get_children ();
for (xmlpp::Node::NodeList::const_iterator i = c.begin(); i != c.end(); ++i) {
xmlpp::ContentNode const * v = dynamic_cast<xmlpp::ContentNode const *> (*i);
if (v) {
content += v->get_content ();
}
}
return content;
}
cxml::File::File (string file, string root_name)
{
if (!filesystem::exists (file)) {
throw cxml::Error ("XML file does not exist");
}
_parser = new xmlpp::DomParser;
_parser->parse_file (file);
if (!_parser) {
throw cxml::Error ("could not parse XML");
}
_node = _parser->get_document()->get_root_node ();
if (_node->get_name() != root_name) {
throw cxml::Error ("unrecognised root node");
}
}
cxml::File::~File ()
{
delete _parser;
}
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