add InterfaceId::HasConstructor

src/core/object.cc

@@ -43,6 +43,7 @@ public:
   std::string GetName (uint16_t uid) const;
   uint16_t GetParent (uint16_t uid) const;
   ns3::CallbackBase GetConstructor (uint16_t uid, uint32_t nArguments);
+  bool HasConstructor (uint16_t uid);
   uint32_t GetRegisteredN (void);
   uint16_t GetRegistered (uint32_t i);
 private:
@@ -160,6 +161,13 @@ IidManager::GetConstructor (uint16_t uid, uint32_t nArguments)
   return ns3::CallbackBase ();
 }
 
+bool 
+IidManager::HasConstructor (uint16_t uid)
+{
+  struct IidInformation *information = LookupInformation (uid);
+  return !information->constructors.empty ();
+}
+
 uint32_t 
 IidManager::GetRegisteredN (void)
 {
@@ -295,6 +303,13 @@ InterfaceId::GetName (void) const
   return name;
 }
 
+bool 
+InterfaceId::HasConstructor (void) const
+{
+  bool hasConstructor = Singleton<IidManager>::Get ()->HasConstructor (m_iid);
+  return hasConstructor;
+}
+
 void
 InterfaceId::DoAddConstructor (CallbackBase cb, uint32_t nArguments)
 {

src/core/object.h

@@ -66,6 +66,11 @@ public:
    */
   std::string GetName (void) const;
 
+  /**
+   * \returns true if this InterfaceId has a constructor
+   */
+  bool HasConstructor (void) const;
+
   InterfaceId (std::string);
 
   InterfaceId SetParent (InterfaceId iid);