1 files changed, 114 insertions, 0 deletions
diff --git a/examples/persistence/position.cxx b/examples/persistence/position.cxx
new file mode 100644
index 0000000..9f4f701
--- /dev/null
+++ b/examples/persistence/position.cxx
@@ -0,0 +1,114 @@
+// file      : examples/persistence/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)
+{
+  // 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, "object", content::complex);
+
+  // Because of the above special case, this constructor is called
+  // without start_element yet being parsed. As a result, we cannot
+  // parse attributes or nested elements in the initializer list.
+  //
+  name_ = p.attribute ("name");
+  type_ = p.attribute<object_type> ("type");
+  id_ = p.attribute<unsigned int> ("id");
+
+  do
+  {
+    p.next_expect (parser::start_element, "position");
+    positions_.push_back (position (p));
+    p.next_expect (parser::end_element);
+
+  } while (p.peek () == parser::start_element);
+
+  p.next_expect (xml::parser::end_element); // object
+}
+
+void object::
+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 ("object");
+
+  s.attribute ("name", name_);
+  s.attribute ("type", type_);
+  s.attribute ("id", id_);
+
+  for (positions_type::const_iterator i (positions_.begin ());
+       i != positions_.end ();
+       ++i)
+  {
+    s.start_element ("position");
+    i->serialize (s);
+    s.end_element ();
+  }
+
+  s.end_element (); // object
+}
+
+// object_type
+//
+ostream&
+operator<< (ostream& os, object_type x)
+{
+  if (x == building)
+    os << "building";
+  else
+    os << "mountain";
+
+  return os;
+}
+
+istream&
+operator>> (istream& is, object_type& x)
+{
+  string s;
+  if (is >> s)
+  {
+    if (s == "building")
+      x = building;
+    else if (s == "mountain")
+      x = mountain;
+    else
+      is.setstate (istream::failbit);
+  }
+
+  return is;
+}