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// file : examples/cxx/hybrid/evolution/passthrough/driver.cxx
// copyright : not copyrighted - public domain
#include <memory> // std::auto_ptr
#include <string>
#include <iostream>
#include "transform.hxx"
#include "transform-pimpl.hxx"
#include "transform-simpl.hxx"
using namespace std;
using namespace transform;
// Parser substitution map callback. This callback is called when the
// parser needs to check whether an element belongs to a substitution
// group. We use this callback to handle unknown transformations.
//
static bool
parser_callback (const xml_schema::ro_string& root_ns,
const xml_schema::ro_string& root_name,
const xml_schema::ro_string& /*member_ns*/,
const xml_schema::ro_string& member_name,
const char*& type)
{
// Check that the root of the substitution group is 'transformation'.
//
if (root_name == "transformation" &&
root_ns == "http://www.codesynthesis.com/transform")
{
// Check that the element's name has the '-transformation' suffix. This
// is the convention we use in our schema to minimize the chance of
// treating any unknown elements as a transformation.
//
//
string s ("-transformation");
string n (member_name);
if (n.size () > s.size () &&
string (n, n.size () - s.size (), s.size ()) == s)
{
// Tell the parser to use unknown_type to parse this element.
//
type = unknown_type_pimpl::_static_type ();
return true;
}
}
return false;
}
// Serializer substitution map callback. This callback is called when
// the serializer needs to map a type to an element belonging to a
// substitution group. We use this callback to handle unknown
// transformations.
//
static bool
serializer_callback (const char* type,
const void* obj,
const char*& ns,
const char*& name)
{
// Check whether this is unknown_type.
//
if (string (type) == unknown_type_simpl::_static_type ())
{
// Cast the opaque obj pointer to unknown_type.
//
const unknown_type* u = reinterpret_cast<const unknown_type*> (obj);
// Extract the actual element name from the object.
//
const xml::qname& n (u->element_name ());
ns = n.ns ().c_str ();
name = n.name ().c_str ();
return true;
}
return false;
}
int
main (int argc, char* argv[])
{
const char* input;
if (argc < 2)
{
input = "STDIN";
cerr << "XML file not specified, reading from STDIN" << endl;
}
else
input = argv[1];
try
{
// Set the substitution map callbacks.
//
xml_schema::parser_smap_callback (&parser_callback);
xml_schema::serializer_smap_callback (&serializer_callback);
// Parse.
//
transformations_paggr transformations_p;
// The last argument to the document's constructor indicates that we
// are parsing polymorphic XML documents.
//
xml_schema::document_pimpl doc_p (
transformations_p.root_parser (),
transformations_p.root_namespace (),
transformations_p.root_name (),
true);
transformations_p.pre ();
if (argc < 2)
doc_p.parse (cin);
else
doc_p.parse (argv[1]);
auto_ptr<transformations_type> tf (transformations_p.post ());
// Print what we've got.
//
for (transformations_type::transformation_iterator i =
tf->transformation ().begin ();
i != tf->transformation ().end ();
++i)
{
transformation_type& t = *i;
if (move_type* m = dynamic_cast<move_type*> (&t))
{
cout << m->name () << ": " << m->description () << endl
<< "\tx: " << m->x () << endl
<< "\ty: " << m->y () << endl
<< endl;
}
else if (rotate_type* r = dynamic_cast<rotate_type*> (&t))
{
cout << r->name () << ": " << r->description () << endl
<< "\tangle: " << r->angle () << endl
<< endl;
}
else if (unknown_type* u = dynamic_cast<unknown_type*> (&t))
{
cout << u->name () << ": " << u->description () << endl
<< "\ttransformation is unknown" << endl
<< endl;
}
}
// Serialize.
//
transformations_saggr transformations_s;
// The last argument to the document's constructor indicates that we
// are serializing polymorphic XML documents.
//
xml_schema::document_simpl doc_s (
transformations_s.root_serializer (),
transformations_s.root_namespace (),
transformations_s.root_name (),
true);
doc_s.add_prefix ("", "http://www.codesynthesis.com/transform");
transformations_s.pre (*tf);
doc_s.serialize (cout, xml_schema::document_simpl::pretty_print);
transformations_s.post ();
}
catch (const xml_schema::parser_exception& e)
{
cerr << input << ":" << e.line () << ":" << e.column () << ": "
<< e.text () << endl;
return 1;
}
catch (const xml_schema::serializer_exception& e)
{
cerr << "error: " << e.text () << endl;
return 1;
}
catch (const std::ios_base::failure&)
{
cerr << input << ": unable to open or read/write failure" << endl;
return 1;
}
return 0;
}
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