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// file : examples/inheritance/position.cxx
// copyright : not copyrighted - public domain
#include <iostream>
#include <xml/parser.hxx>
#include <xml/serializer.hxx>
#include "position.hxx"
using namespace std;
using namespace xml;
// position
//
position::
position (parser& p)
: lat_ (p.attribute<float> ("lat")),
lon_ (p.attribute<float> ("lon"))
{
p.content (content::empty);
}
void position::
serialize (serializer& s) const
{
s.attribute ("lat", lat_);
s.attribute ("lon", lon_);
}
// object
//
object::
object (parser& p)
: name_ (p.attribute ("name")),
id_ (p.attribute<unsigned int> ("id"))
{
p.content (content::complex);
do
{
p.next_expect (parser::start_element, "position");
positions_.push_back (position (p));
p.next_expect (parser::end_element);
// Note that here we have to also check the name to make sure
// it is the position element and not something that should be
// handled by a derived class.
//
} while (p.peek () == parser::start_element && p.name () == "position");
}
void object::
serialize_attributes (serializer& s) const
{
s.attribute ("name", name_);
s.attribute ("id", id_);
}
void object::
serialize_content (serializer& s) const
{
for (positions_type::const_iterator i (positions_.begin ());
i != positions_.end ();
++i)
{
s.start_element ("position");
i->serialize (s);
s.end_element ();
}
}
// elevation
//
elevation::
elevation (parser& p)
: value_ (p.attribute<float> ("val"))
{
p.content (content::empty);
}
void elevation::
serialize (serializer& s) const
{
s.attribute ("val", value_);
}
// object
//
elevated_object::
elevated_object (parser& p)
: object (p), // First parse our base.
units_ (p.attribute ("units"))
{
// If we are happy with the content model used by our base (complex
// in this case), then we don't need to set one ourselves. We, could,
// however "upgrade" our content model from empty to either simple or
// complex.
do
{
p.next_expect (parser::start_element, "elevation");
elevations_.push_back (elevation (p));
p.next_expect (parser::end_element);
} while (p.peek () == parser::start_element && p.name () == "elevation");
}
void elevated_object::
serialize_attributes (serializer& s) const
{
object::serialize_attributes (s); // First serialize our base attributes.
s.attribute ("units", units_);
}
void elevated_object::
serialize_content (serializer& s) const
{
object::serialize_content (s); // First serialize our base content.
for (elevations_type::const_iterator i (elevations_.begin ());
i != elevations_.end ();
++i)
{
s.start_element ("elevation");
i->serialize (s);
s.end_element ();
}
}
// objects
//
objects::
objects (parser& p)
{
// Note that for the root of the object model we parse the start/end
// element ourselves instead of expecting the caller to do so. This
// makes the client code nice and simple.
//
p.next_expect (parser::start_element, "objects", content::complex);
// First parse all the objects, if any.
//
while (p.peek () == parser::start_element && p.name () == "object")
{
p.next (); // "Swallow" the start_element event.
simple_objects_.push_back (object (p));
p.next_expect (parser::end_element);
}
// Then parse all the elevated object, if any.
//
while (p.peek () == parser::start_element && p.name () == "elevated-object")
{
p.next (); // "Swallow" the start_element event.
elevated_objects_.push_back (elevated_object (p));
p.next_expect (parser::end_element);
}
// We should have at least one object.
//
if (simple_objects_.empty () && elevated_objects_.empty ())
throw parsing (p, "at least one object or elevated object required");
p.next_expect (xml::parser::end_element); // objects
}
void objects::
serialize (serializer& s) const
{
// Note that for the root of the object model we serialize the
// start/end element ourselves instead of expecting the caller
// to do so. This makes the client code nice and simple.
//
s.start_element ("objects");
// First serialize all the objects.
//
for (simple_objects_type::const_iterator i (simple_objects_.begin ());
i != simple_objects_.end ();
++i)
{
s.start_element ("object");
i->serialize (s);
s.end_element ();
}
// Then serialize all the elevated objects.
//
for (elevated_objects_type::const_iterator i (elevated_objects_.begin ());
i != elevated_objects_.end ();
++i)
{
s.start_element ("elevated-object");
i->serialize (s);
s.end_element ();
}
s.end_element (); // objects
}
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