Handle nullptr in to/fromIce

source/RobotAPI/libraries/armem/core/ice_conversions.h

@@ -71,7 +71,10 @@ namespace armarx::armem
     template <class IceT, class CppT>
     void toIce(IceT& ice, const std::unique_ptr<CppT>& cppPointer)
     {
-        toIce(ice, *cppPointer);
+        if (cppPointer)
+        {
+            toIce(ice, *cppPointer);
+        }
     }
     template <class IceT, class CppT>
     void fromIce(const IceT& ice, std::unique_ptr<CppT>& cppPointer)
@@ -89,20 +92,37 @@ namespace armarx::armem
     template <class IceT, class CppT>
     void fromIce(const ::IceInternal::Handle<IceT>& ice, CppT& cpp)
     {
-        fromIce(*ice, cpp);
+        if (ice)
+        {
+            fromIce(*ice, cpp);
+        }
     }
 
     template <class IceT, class CppT>
     void toIce(::IceInternal::Handle<IceT>& ice, const std::unique_ptr<CppT>& cppPointer)
     {
-        ice = new IceT();
-        toIce(*ice, *cppPointer);
+        if (cppPointer)
+        {
+            ice = new IceT();
+            toIce(*ice, *cppPointer);
+        }
+        else
+        {
+            ice = nullptr;
+        }
     }
     template <class IceT, class CppT>
     void fromIce(const ::IceInternal::Handle<IceT>& ice, std::unique_ptr<CppT>& cppPointer)
     {
-        cppPointer = std::make_unique<CppT>();
-        fromIce(*ice, *cppPointer);
+        if (ice)
+        {
+            cppPointer = std::make_unique<CppT>();
+            fromIce(*ice, *cppPointer);
+        }
+        else
+        {
+            cppPointer = nullptr;
+        }
     }
 
     template <class IceT, class CppT>