allow to construct interface rt vals

Author: Helge Mathee

Diff for: DGGraphImpl.cpp

@@ -2359,7 +2359,7 @@ void DGGraphImpl::getDGPortInfo(FabricCore::Variant & portInfo, FabricCore::RTVa
           {
             if(!rtVal.isNullObject())
             {
-              FabricCore::RTVal persistable = FabricSplice::constructObjectRTVal("Persistable", 1, &rtVal);
+              FabricCore::RTVal persistable = FabricSplice::constructInterfaceRTVal("Persistable", rtVal);
               if(!persistable.isNullObject())
               {
                 try
@@ -2369,7 +2369,8 @@ void DGGraphImpl::getDGPortInfo(FabricCore::Variant & portInfo, FabricCore::RTVa
                 }
                 catch(FabricCore::Exception e)
                 {
-                  LoggingImpl::reportError(e.getDesc_cstr());
+                  //ignore errors, assume we couldn't cast.
+                  //LoggingImpl::reportError(e.getDesc_cstr());
                 }
               }
             }
@@ -2682,7 +2683,7 @@ bool DGGraphImpl::setFromPersistenceDataDict(
           FabricCore::RTVal memberRTVal = dgNode.getMemberSliceValue(valueMemberVar->getStringData(), 0);
           if(memberRTVal.isValid() && !memberRTVal.isNullObject())
           {
-            FabricCore::RTVal persistable = FabricSplice::constructObjectRTVal("Persistable", 1, &memberRTVal);
+            FabricCore::RTVal persistable = FabricSplice::constructInterfaceRTVal("Persistable", memberRTVal);
             if(!persistable.isNullObject())
             {
               try

Diff for: FabricSplice.cpp

@@ -190,6 +190,21 @@ void FECS_ConstructObjectRTValArgs(FabricCore::RTVal & result, const char * rt,
   FECS_CATCH_VOID
 }
 
+void FECS_ConstructInterfaceRTValArgs(FabricCore::RTVal & result, const char * rt, const FabricCore::RTVal & object)
+{
+  FECS_TRY_CLEARERROR
+  const FabricCore::Client * client = DGGraphImpl::getClient();
+  if(client == NULL)
+    return;
+
+  const char * realExtName = FabricCore::GetRegisteredTypeExtName(*client, rt);
+  if(realExtName != NULL)
+    DGGraphImpl::loadExtension(realExtName);
+
+  result = FabricCore::RTVal::Construct(*client, rt, 1, &object);
+  FECS_CATCH_VOID
+}
+
 void FECS_ConstructBooleanRTVal(FabricCore::RTVal & result, bool value)
 {
   FECS_TRY_CLEARERROR

Diff for: FabricSplice.h

@@ -180,6 +180,9 @@ The SPLICECAPI provides several global functions. These can be used to initializ
       // creates a RTVal given a KL object name and construction args
       FabricCore::RTVal constructObjectRTVal(const char * rt, uint32_t nbArgs, const FabricCore::RTVal * args);
 
+      // creates a KL interface RTVal given a KL object to cast
+      FabricCore::RTVal constructInterfaceRTVal(const char * rt, const FabricCore::RTVal & object);
+
       // creates a Boolean RTVal given its value
       FabricCore::RTVal constructBooleanRTVal(bool value);
 
@@ -1701,6 +1704,7 @@ FECS_DECL void FECS_ConstructRTVal(FabricCore::RTVal & result, const char * rt);
 FECS_DECL void FECS_ConstructRTValArgs(FabricCore::RTVal & result, const char * rt, uint32_t nbArgs, const FabricCore::RTVal * args);
 FECS_DECL void FECS_ConstructObjectRTVal(FabricCore::RTVal & result, const char * rt);
 FECS_DECL void FECS_ConstructObjectRTValArgs(FabricCore::RTVal & result, const char * rt, uint32_t nbArgs, const FabricCore::RTVal * args);
+FECS_DECL void FECS_ConstructInterfaceRTValArgs(FabricCore::RTVal & result, const char * rt, const FabricCore::RTVal & object);
 FECS_DECL void FECS_ConstructBooleanRTVal(FabricCore::RTVal & result, bool value);
 FECS_DECL void FECS_ConstructSInt8RTVal(FabricCore::RTVal & result, int8_t value);
 FECS_DECL void FECS_ConstructSInt16RTVal(FabricCore::RTVal & result, int16_t value);
@@ -2112,6 +2116,15 @@ namespace FabricSplice
     return result;
   }
 
+  // creates a KL interface RTVal given a KL object to cast
+  inline FabricCore::RTVal constructInterfaceRTVal(const char * rt, const FabricCore::RTVal & object)
+  {
+    FabricCore::RTVal result;
+    FECS_ConstructInterfaceRTValArgs(result, rt, object);
+    Exception::MaybeThrow();
+    return result;
+  }
+
   // creates a Boolean RTVal given its value
   inline FabricCore::RTVal constructBooleanRTVal(bool value)
   {