Properties: Store and compare type names instead of relying on dynamic_cast

src/OpenVolumeMesh/Core/BaseProperty.hh

@@ -32,14 +32,6 @@
  *                                                                           *
 \*===========================================================================*/
 
-/*===========================================================================*\
- *                                                                           *
- *   $Revision$                                                         *
- *   $Date$                    *
- *   $LastChangedBy$                                                *
- *                                                                           *
-\*===========================================================================*/
-
 #ifndef BASEPROPERTY_HH_
 #define BASEPROPERTY_HH_
 
@@ -93,6 +85,8 @@ public:
 
 protected:
 
+    virtual const std::string &internal_type_name() const = 0;
+
     /// Copy data from other property. `other` MUST point to an object with the same type as `this`!
     /// Currently no type check is performed.
     virtual void assign_values_from(const BaseProperty *other) = 0;

src/OpenVolumeMesh/Core/OpenVolumeMeshBaseProperty.hh

@@ -32,15 +32,6 @@
  *                                                                           *
 \*===========================================================================*/
 
-/*===========================================================================*\
- *                                                                           *
- *   $Revision$                                                         *
- *   $Date$                    *
- *   $LastChangedBy$                                                *
- *                                                                           *
-\*===========================================================================*/
-
-
 #ifndef OPENVOLUMEMESHBASEPROPERTY_HH
 #define OPENVOLUMEMESHBASEPROPERTY_HH
 
@@ -71,9 +62,14 @@ public:
 
 public:
 
-	explicit OpenVolumeMeshBaseProperty(const std::string& _name = "<unknown>") :
-		name_(_name), persistent_(false), handle_(-1) {
-	}
+	explicit OpenVolumeMeshBaseProperty(
+            const std::string& _name = "<unknown>",
+            const std::string& _internal_type_name = "<unknown>")
+        : name_(_name),
+          internal_type_name_(_internal_type_name),
+          persistent_(false),
+          handle_(-1)
+    {}
 
 	OpenVolumeMeshBaseProperty(const OpenVolumeMeshBaseProperty& _rhs) = default;
 
@@ -107,6 +103,10 @@ public:
 		return name_;
 	}
 
+	const std::string& internal_type_name() const {
+		return internal_type_name_;
+	}
+
 	// Function to serialize a property
 	virtual void serialize(std::ostream& /*_ostr*/) const {}
 
@@ -148,6 +148,7 @@ protected:
 private:
 
 	std::string name_;
+	std::string internal_type_name_;
 
 	bool persistent_;
 

src/OpenVolumeMesh/Core/OpenVolumeMeshProperty.hh

@@ -62,7 +62,7 @@ template<class T>
 class OpenVolumeMeshPropertyT: public OpenVolumeMeshBaseProperty {
 public:
 
-    template <class PropT, class HandleT> friend class PropertyPtr;
+    template <class PropT, class Entity> friend class PropertyPtr;
 
 	typedef T 										Value;
 	typedef std::vector<T> 				            vector_type;
@@ -72,10 +72,13 @@ public:
 
 public:
 
-	OpenVolumeMeshPropertyT(const std::string& _name = "<unknown>", const T &_def = T()) :
-		OpenVolumeMeshBaseProperty(_name),
-		def_(_def) {
-	}
+	explicit OpenVolumeMeshPropertyT(
+            const std::string& _name = "<unknown>",
+            const std::string& _internal_type_name = "<unknown>",
+            const T &_def = T())
+        : OpenVolumeMeshBaseProperty(_name, _internal_type_name),
+          def_(_def)
+    {}
 
 
 	OpenVolumeMeshPropertyT(const OpenVolumeMeshPropertyT& _rhs) = default;

src/OpenVolumeMesh/Core/PropertyDefines.hh

@@ -89,7 +89,7 @@ public:
         : PropertyTT(std::move(mesh->template request_property<T, Entity>(_name, _def)))
     {}
     using PropertyHandleT = OpenVolumeMesh::PropHandleT<Entity>;
-    PropertyTT(const std::string& _name, ResourceManager& _resMan, PropertyHandleT _handle, const T _def = T());
+    PropertyTT(const std::string& _name, const std::string& _internal_type_name, ResourceManager& _resMan, PropertyHandleT _handle, const T _def = T());
     virtual ~PropertyTT() = default;
     virtual BaseProperty* clone(ResourceManager &_resMan, OpenVolumeMeshHandle _handle) const;
     virtual const std::string entityType() const { return entityTypeName<Entity>(); }

src/OpenVolumeMesh/Core/PropertyDefinesT_impl.hh

@@ -42,8 +42,8 @@
 namespace OpenVolumeMesh {
 
 template<typename T, typename Entity>
-PropertyTT<T,Entity>::PropertyTT(const std::string& _name, ResourceManager& _resMan, PropertyHandleT _handle, const T _def) :
-        PropertyPtr<OpenVolumeMeshPropertyT<T>, Entity>(new OpenVolumeMeshPropertyT<T>(_name, _def), _resMan, _handle) {
+PropertyTT<T,Entity>::PropertyTT(const std::string& _name, const std::string& _internal_type_name, ResourceManager& _resMan, PropertyHandleT _handle, const T _def) :
+        PropertyPtr<OpenVolumeMeshPropertyT<T>, Entity>(new OpenVolumeMeshPropertyT<T>(_name, _internal_type_name, _def), _resMan, _handle) {
 
 }
 

src/OpenVolumeMesh/Core/PropertyPtr.hh

@@ -114,6 +114,7 @@ public:
     virtual bool anonymous() const { return ptr::shared_ptr<PropT>::get()->name().empty(); }
 
 protected:
+    virtual const std::string &internal_type_name() const { return ptr::shared_ptr<PropT>::get()->internal_type_name(); }
 
     void assign_values_from(const BaseProperty *other) override;
     void move_values_from(BaseProperty *other) override;

src/OpenVolumeMesh/Core/ResourceManagerT_impl.hh

@@ -44,9 +44,11 @@
 
 #include "ResourceManager.hh"
 #include "PropertyDefines.hh"
+#include "TypeName.hh"
 
 namespace OpenVolumeMesh {
 
+
 template<class T>
 VertexPropertyT<T> ResourceManager::request_vertex_property(const std::string& _name, const T _def) {
 
@@ -90,25 +92,24 @@ MeshPropertyT<T> ResourceManager::request_mesh_property(const std::string& _name
 }
 
 template<class StdVecT, class PropT, class HandleT, class T>
-PropT ResourceManager::internal_request_property(StdVecT& _vec, const std::string& _name, size_t _size, const T _def) {
+PropT ResourceManager::internal_request_property(StdVecT& _vec, const std::string& _name, size_t _size, const T _def)
+{
+    auto type_name = get_type_name<T>();
 
     if(!_name.empty()) {
         for(typename StdVecT::iterator it = _vec.begin();
                 it != _vec.end(); ++it) {
-            if((*it)->name() == _name) {
-#if OVM_FORCE_STATIC_CAST
+            if((*it)->name() == _name
+                && (*it)->internal_type_name() == type_name)
+            {
                 return *static_cast<PropT*>(*it);
-#else
-                PropT* prop = dynamic_cast<PropT*>(*it);
-                if(prop != NULL) return *prop;
-#endif
             }
         }
     }
 
     HandleT handle((int)_vec.size());
 
-    PropT* prop = new PropT(_name, *this, handle, _def);
+    PropT* prop = new PropT(_name, type_name, *this, handle, _def);
     prop->resize(_size);
 
     // Store property pointer

src/OpenVolumeMesh/Core/TypeName.hh

+#include <string>
+#include <typeinfo>
+
+/// Get an internal name for a type. Important: this differs between
+/// compilers and versions, do NOT use in file formats!
+/// We need this in order to provide property type safety when
+/// only limited RTTI support is available.
+template<typename T>
+std::string get_type_name()
+{
+#ifdef _MSC_VER
+    // MSVC's type_name only returns a friendly name with .name(),
+    // get the more unique mangled name using .raw_name():
+    return typeid(T).raw_name();
+#else
+    // GCC and clang currently return the mangled name as .name(),
+    // there is no .raw_name()
+    return typeid(T).name();
+#endif
+}
+