extendedAttributeEncoderHLA.h

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/*******************************************************************************
** Copyright (c) 2017 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#if DtHLA

#include <vlutil/vlString.h>
#include <vl/fom.h>
#include <vl/objClassDesc.h>
#include <vl/hlaStateEncoder.h>
#include <vrfExtObjects/stateRepositoryWithExtendedAttributesHLA.h>

namespace makVrfVrlinkExtToolkit
{
   template <typename StateRepType>
   class DtExtendedAttributeEncoder : public DtHlaStateEncoder
   {
   public:

      static void encodeExtendedAttribute(const StateRepType& rep,
         RTI::AttributeHandleValuePairSet* attrs,
         RTI::AttributeHandle attrHandle)
      {
         const StateRepType* extSR = dynamic_cast<const StateRepType*>(&rep);

         if (!extSR)
         {
            return;
         }

         unsigned srLength = 0;
         const char* srValue = extSR->getAttributeByHandle(attrHandle, srLength);

         if (srLength > 0)
         {
            attrs->add(attrHandle, (char*)srValue, srLength);
         }
      }

      static bool needExtendedAttribute(const DtStateRepository& stateRep,
         const DtStateRepository& asSeenByRemote,
         RTI::AttributeHandle attrHandle)
      {
         const StateRepType* extSR = dynamic_cast<const StateRepType*>(&stateRep);
         const StateRepType* extASBR = dynamic_cast<const StateRepType*>(&asSeenByRemote);

         if (!extSR || !extASBR)
         {
            return false;
         }

         unsigned srLength = 0;
         unsigned asbrLength = 0;
         const char* srValue = extSR->getAttributeByHandle(attrHandle, srLength);
         const char* asbrValue = extASBR->getAttributeByHandle(attrHandle, asbrLength);

         return (srLength != asbrLength ||
            memcmp(srValue, asbrValue, srLength) != 0);
      }

   };
}


#endif