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// file : xsd-frontend/transformations/simplifier.cxx
// copyright : Copyright (c) 2006-2014 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#include <xsd-frontend/semantic-graph.hxx>
#include <xsd-frontend/traversal.hxx>
#include <xsd-frontend/transformations/simplifier.hxx>
namespace XSDFrontend
{
namespace
{
struct Compositor: Traversal::All,
Traversal::Choice,
Traversal::Sequence
{
Compositor (SemanticGraph::Schema& root)
: root_ (root)
{
}
virtual void
traverse (SemanticGraph::All& a)
{
// The all compositor cannot contain compositors.
//
if (a.contains_begin () == a.contains_end ())
remove (a);
}
virtual void
traverse (SemanticGraph::Choice& c)
{
// Do the depth-first traversal so that we take into account
// the potential removal of nested compositors.
//
using SemanticGraph::Compositor;
for (Compositor::ContainsIterator i (c.contains_begin ());
i != c.contains_end ();)
{
edge_traverser ().dispatch (*i++);
}
Choice::contains (c);
if (c.contains_begin () == c.contains_end ())
remove (c);
}
virtual void
traverse (SemanticGraph::Sequence& s)
{
// Do the depth-first traversal so that we take into account
// the potential removal of nested compositors.
//
using SemanticGraph::Compositor;
for (Compositor::ContainsIterator i (s.contains_begin ());
i != s.contains_end ();)
{
edge_traverser ().dispatch (*i++);
}
if (s.contains_begin () == s.contains_end ())
remove (s);
}
private:
virtual void
remove (SemanticGraph::Compositor& c)
{
using SemanticGraph::Node;
using SemanticGraph::Choice;
using SemanticGraph::Complex;
using SemanticGraph::Compositor;
if (c.contained_particle_p ())
{
Compositor& com (c.contained_particle ().compositor ());
// Empty compositors in choice are important.
//
if (!com.is_a<Choice> ())
root_.delete_edge (com, c, c.contained_particle ());
}
else
{
Complex& con (
dynamic_cast<Complex&> (c.contained_compositor ().container ()));
root_.delete_edge (con, c, c.contained_compositor ());
}
}
private:
SemanticGraph::Schema& root_;
};
//
//
struct Type: Traversal::Complex
{
virtual void
traverse (SemanticGraph::Complex& c)
{
if (c.contains_compositor_p ())
Complex::contains_compositor (c);
}
};
// Go into implied/included/imported schemas while making sure
// we don't process the same stuff more than once.
//
struct Uses: Traversal::Uses
{
virtual void
traverse (Type& u)
{
SemanticGraph::Schema& s (u.schema ());
if (!s.context ().count ("xsd-frontend-simplifier-seen"))
{
s.context ().set ("xsd-frontend-simplifier-seen", true);
Traversal::Uses::traverse (u);
}
}
};
}
namespace Transformations
{
void Simplifier::
transform (SemanticGraph::Schema& s, SemanticGraph::Path const&)
{
Traversal::Schema schema;
Uses uses;
schema >> uses >> schema;
Traversal::Names schema_names;
Traversal::Namespace ns;
Traversal::Names ns_names;
Type type;
schema >> schema_names >> ns >> ns_names >> type;
Compositor compositor (s);
Traversal::ContainsCompositor contains_compositor;
Traversal::ContainsParticle contains_particle;
type >> contains_compositor >> compositor;
compositor >> contains_particle >> compositor;
// Some twisted schemas do recusive inclusions.
//
s.context ().set ("xsd-frontend-simplifier-seen", true);
schema.dispatch (s);
}
}
}
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