source: XIOS/trunk/src/transformation/grid_transformation.cpp @ 872

/*!
   \file grid_transformation.cpp
   \author Ha NGUYEN
   \since 14 May 2015
   \date 02 Jul 2015

   \brief Interface for all transformations.
 */
#include "grid_transformation.hpp"
#include "axis_algorithm_inverse.hpp"
#include "axis_algorithm_zoom.hpp"
#include "axis_algorithm_interpolate.hpp"
#include "domain_algorithm_zoom.hpp"
#include "domain_algorithm_interpolate.hpp"
#include "context.hpp"
#include "context_client.hpp"
#include "axis_algorithm_transformation.hpp"
#include "distribution_client.hpp"
#include "mpi_tag.hpp"
#include "grid.hpp"
#include <boost/unordered_map.hpp>

namespace xios {
CGridTransformation::CGridTransformation(CGrid* destination, CGrid* source)
: gridSource_(source), gridDestination_(destination), tmpGridDestination_(destination),
  originalGridSource_(source), algoTypes_(), nbAlgos_(0), tempGridSrcs_(), tempGridDests_(),
  auxInputs_(), dynamicalTransformation_(false), timeStamp_()

{
  //Verify the compatibity between two grids
  int numElement = gridDestination_->axis_domain_order.numElements();
  if (numElement != gridSource_->axis_domain_order.numElements())
    ERROR("CGridTransformation::CGridTransformation(CGrid* destination, CGrid* source)",
       << "Two grids have different number of elements"
       << "Number of elements of grid source " <<gridSource_->getId() << " is " << gridSource_->axis_domain_order.numElements()  << std::endl
       << "Number of elements of grid destination " <<gridDestination_->getId() << " is " << numElement);

  for (int i = 0; i < numElement; ++i)
  {
    if (gridDestination_->axis_domain_order(i) != gridSource_->axis_domain_order(i))
      ERROR("CGridTransformation::CGridTransformation(CGrid* destination, CGrid* source)",
         << "Transformed grid and its grid source have incompatible elements"
         << "Grid source " <<gridSource_->getId() << std::endl
         << "Grid destination " <<gridDestination_->getId());
  }

  initializeTransformations();
}

/*!
  Initialize the mapping between the first grid source and the original one
  In a series of transformation, for each step, there is a need to "create" a new grid that plays a role of "temporary" source.
Because at the end of the series, we need to know about the index mapping between the final grid destination and original grid source,
for each transformation, we need to make sure that the current "temporary source" maps its global index correctly to the original one.
*/
void CGridTransformation::initializeTransformations()
{
  CContext* context = CContext::getCurrent();
  CContextClient* client = context->client;

  // Initialize algorithms
  initializeAlgorithms();

  ListAlgoType::const_iterator itb = listAlgos_.begin(),
                               ite = listAlgos_.end(), it;

  for (it = itb; it != ite; ++it)
  {
    ETranformationType transType = (it->second).first;
    if (!isSpecialTransformation(transType)) ++nbAlgos_;
  }
}

CGridTransformation::~CGridTransformation()
{
  std::vector<CGenericAlgorithmTransformation*>::const_iterator itb = algoTransformation_.begin(), it,
                                                                ite = algoTransformation_.end();
  for (it = itb; it != ite; ++it) delete (*it);
}

/*!
  Initialize the algorithms (transformations)
*/
void CGridTransformation::initializeAlgorithms()
{
  std::vector<int> axisPositionInGrid;
  std::vector<int> domPositionInGrid;
  std::vector<CAxis*> axisListDestP = gridDestination_->getAxis();
  std::vector<CDomain*> domListDestP = gridDestination_->getDomains();

  int idx = 0;
  for (int i = 0; i < gridDestination_->axis_domain_order.numElements(); ++i)
  {
    if (false == (gridDestination_->axis_domain_order)(i))
    {
      axisPositionInGrid.push_back(i);
    }
    else
    {
      domPositionInGrid.push_back(i);
    }
  }

  for (int i = 0; i < axisListDestP.size(); ++i)
  {
    elementPosition2AxisPositionInGrid_[axisPositionInGrid[i]] = i;
  }

  for (int i = 0; i < domListDestP.size(); ++i)
  {
    elementPosition2DomainPositionInGrid_[domPositionInGrid[i]] = i;
  }

  idx = 0;
  for (int i = 0; i < gridDestination_->axis_domain_order.numElements(); ++i)
  {
    if (false == (gridDestination_->axis_domain_order)(i))
    {
      initializeAxisAlgorithms(i);
    }
    else
    {
      initializeDomainAlgorithms(i);
    }
  }
}

/*!
  Initialize the algorithms corresponding to transformation info contained in each axis.
If an axis has transformations, these transformations will be represented in form of vector of CTransformation pointers
In general, each axis can have several transformations performed on itself. However, should they be done seperately or combinely (of course in order)?
For now, one approach is to do these combinely but maybe this needs changing.
\param [in] axisPositionInGrid position of an axis in grid. (for example: a grid with one domain and one axis, position of domain is 1, position of axis is 2)
*/
void CGridTransformation::initializeAxisAlgorithms(int axisPositionInGrid)
{
  std::vector<CAxis*> axisListDestP = gridDestination_->getAxis();
  std::vector<CAxis*> axisListSrcP = gridSource_->getAxis();
  if (!axisListDestP.empty())
  {
    // If source and destination grid share the same axis
    if (axisListDestP[elementPosition2AxisPositionInGrid_[axisPositionInGrid]] ==
        axisListSrcP[elementPosition2AxisPositionInGrid_[axisPositionInGrid]]) return;

    if (axisListDestP[elementPosition2AxisPositionInGrid_[axisPositionInGrid]]->hasTransformation())
    {
      CAxis::TransMapTypes trans = axisListDestP[elementPosition2AxisPositionInGrid_[axisPositionInGrid]]->getAllTransformations();
      CAxis::TransMapTypes::const_iterator itb = trans.begin(), it,
                                           ite = trans.end();
      int transformationOrder = 0;
      for (it = itb; it != ite; ++it)
      {
        listAlgos_.push_back(std::make_pair(axisPositionInGrid, std::make_pair(it->first, transformationOrder)));
        algoTypes_.push_back(false);
        ++transformationOrder;
        std::vector<StdString> auxInput = (it->second)->checkAuxInputs();
        for (int idx = 0; idx < auxInput.size(); ++idx) auxInputs_.push_back(auxInput[idx]);
      }
    }
  }
}

/*!
  Initialize the algorithms corresponding to transformation info contained in each domain.
If a domain has transformations, they will be represented in form of vector of CTransformation pointers
In general, each domain can have several transformations performed on itself.
\param [in] domPositionInGrid position of a domain in grid. (for example: a grid with one domain and one axis, position of domain is 1, position of axis is 2)
*/
void CGridTransformation::initializeDomainAlgorithms(int domPositionInGrid)
{
  std::vector<CDomain*> domListDestP = gridDestination_->getDomains();
  std::vector<CDomain*> domListSrcP = gridSource_->getDomains();
  if (!domListDestP.empty())
  {
    // If source and destination grid share the same domain
    if (domListDestP[elementPosition2DomainPositionInGrid_[domPositionInGrid]] ==
        domListSrcP[elementPosition2DomainPositionInGrid_[domPositionInGrid]]) return;

    if (domListDestP[elementPosition2DomainPositionInGrid_[domPositionInGrid]]->hasTransformation())
    {
      CDomain::TransMapTypes trans = domListDestP[elementPosition2DomainPositionInGrid_[domPositionInGrid]]->getAllTransformations();
      CDomain::TransMapTypes::const_iterator itb = trans.begin(), it,
                                             ite = trans.end();
      int transformationOrder = 0;
      for (it = itb; it != ite; ++it)
      {
        listAlgos_.push_back(std::make_pair(domPositionInGrid, std::make_pair(it->first, transformationOrder)));
        algoTypes_.push_back(true);
        ++transformationOrder;
        std::vector<StdString> auxInput = (it->second)->checkAuxInputs();
        for (int idx = 0; idx < auxInput.size(); ++idx) auxInputs_.push_back(auxInput[idx]);
      }
    }
  }

}

/*!
  Select algorithm correspoding to its transformation type and its position in each element
  \param [in] elementPositionInGrid position of element in grid. e.g: a grid has 1 domain and 1 axis, then position of domain is 1 (because it contains 2 basic elements)
                                             and position of axis is 2
  \param [in] transType transformation type, for now we have Zoom_axis, inverse_axis
  \param [in] transformationOrder position of the transformation in an element (an element can have several transformation)
  \param [in] isDomainAlgo flag to specify type of algorithm (for domain or axis)
*/
void CGridTransformation::selectAlgo(int elementPositionInGrid, ETranformationType transType, int transformationOrder, bool isDomainAlgo)
{
   if (isDomainAlgo) selectDomainAlgo(elementPositionInGrid, transType, transformationOrder);
   else selectAxisAlgo(elementPositionInGrid, transType, transformationOrder);
}

/*!
  Select algorithm of an axis correspoding to its transformation type and its position in each element
  \param [in] elementPositionInGrid position of element in grid. e.g: a grid has 1 domain and 1 axis, then position of domain is 1 (because it contains 2 basic elements)
                                             and position of axis is 2
  \param [in] transType transformation type, for now we have Zoom_axis, inverse_axis
  \param [in] transformationOrder position of the transformation in an element (an element can have several transformation)
*/
void CGridTransformation::selectAxisAlgo(int elementPositionInGrid, ETranformationType transType, int transformationOrder)
{
  std::vector<CAxis*> axisListDestP = gridDestination_->getAxis();
  std::vector<CAxis*> axisListSrcP = gridSource_->getAxis();

  int axisIndex =  elementPosition2AxisPositionInGrid_[elementPositionInGrid];
  CAxis::TransMapTypes trans = axisListDestP[axisIndex]->getAllTransformations();
  CAxis::TransMapTypes::const_iterator it = trans.begin();

  for (int i = 0; i < transformationOrder; ++i, ++it) {}  // Find the correct transformation

  CZoomAxis* zoomAxis = 0;
  CInterpolateAxis* interpAxis = 0;
  CGenericAlgorithmTransformation* algo = 0;
  switch (transType)
  {
    case TRANS_INTERPOLATE_AXIS:
      interpAxis = dynamic_cast<CInterpolateAxis*> (it->second);
      algo = new CAxisAlgorithmInterpolate(axisListDestP[axisIndex], axisListSrcP[axisIndex], interpAxis);
      break;
    case TRANS_ZOOM_AXIS:
      zoomAxis = dynamic_cast<CZoomAxis*> (it->second);
      algo = new CAxisAlgorithmZoom(axisListDestP[axisIndex], axisListSrcP[axisIndex], zoomAxis);
      break;
    case TRANS_INVERSE_AXIS:
      algo = new CAxisAlgorithmInverse(axisListDestP[axisIndex], axisListSrcP[axisIndex]);
      break;
    default:
      break;
  }
  algoTransformation_.push_back(algo);

}

/*!
  Select algorithm of a domain correspoding to its transformation type and its position in each element
  \param [in] elementPositionInGrid position of element in grid. e.g: a grid has 1 domain and 1 axis, then position of domain is 1 (because it contains 2 basic elements)
                                             and position of axis is 2
  \param [in] transType transformation type, for now we have Zoom_axis, inverse_axis
  \param [in] transformationOrder position of the transformation in an element (an element can have several transformation)
*/
void CGridTransformation::selectDomainAlgo(int elementPositionInGrid, ETranformationType transType, int transformationOrder)
{
  std::vector<CDomain*> domainListDestP = gridDestination_->getDomains();
  std::vector<CDomain*> domainListSrcP = gridSource_->getDomains();

  int domainIndex =  elementPosition2DomainPositionInGrid_[elementPositionInGrid];
  CDomain::TransMapTypes trans = domainListDestP[domainIndex]->getAllTransformations();
  CDomain::TransMapTypes::const_iterator it = trans.begin();

  for (int i = 0; i < transformationOrder; ++i, ++it) {}  // Find the correct transformation

  CZoomDomain* zoomDomain = 0;
  CInterpolateDomain* interpFileDomain = 0;
  CGenericAlgorithmTransformation* algo = 0;
  switch (transType)
  {
    case TRANS_INTERPOLATE_DOMAIN:
      interpFileDomain = dynamic_cast<CInterpolateDomain*> (it->second);
      algo = new CDomainAlgorithmInterpolate(domainListDestP[domainIndex], domainListSrcP[domainIndex],interpFileDomain);
      break;
    case TRANS_ZOOM_DOMAIN:
      zoomDomain = dynamic_cast<CZoomDomain*> (it->second);
      algo = new CDomainAlgorithmZoom(domainListDestP[domainIndex], domainListSrcP[domainIndex], zoomDomain);
      break;
    default:
      break;
  }
  algoTransformation_.push_back(algo);
}

/*!
  If there are more than one transformation, a new temporary grid will be created and it will play the role of grid destination.
This new created one keeps a pointer to the real transformed element of grid destination and generate new copies of other elements from grid source.
  \param [in] elementPositionInGrid position of element in grid
  \param [in] transType transformation type
*/
void CGridTransformation::setUpGridDestination(int elementPositionInGrid, ETranformationType transType, int nbTransformation)
{
  if (isSpecialTransformation(transType)) return;

  if (!tempGridDests_.empty() && (getNbAlgo() == tempGridDests_.size()))
  {
    tempGridDests_.resize(0);
  }
  std::vector<CAxis*> axisListDestP = gridDestination_->getAxis();
  std::vector<CAxis*> axisListSrcP = gridSource_->getAxis(), axisDst;

  std::vector<CDomain*> domListDestP = gridDestination_->getDomains();
  std::vector<CDomain*> domListSrcP = gridSource_->getDomains(), domainDst;

  int axisIndex = -1, domainIndex = -1;
  switch (transType)
  {
    case TRANS_INTERPOLATE_DOMAIN:
    case TRANS_ZOOM_DOMAIN:
      domainIndex = elementPosition2DomainPositionInGrid_[elementPositionInGrid];
      break;

    case TRANS_INTERPOLATE_AXIS:
    case TRANS_ZOOM_AXIS:
    case TRANS_INVERSE_AXIS:
      axisIndex =  elementPosition2AxisPositionInGrid_[elementPositionInGrid];
      break;
    default:
      break;
  }

  for (int idx = 0; idx < axisListSrcP.size(); ++idx)
  {
    CAxis* axis = (axisIndex != idx) ? axisListSrcP[idx] : axisListDestP[idx];
    axisDst.push_back(axis);
  }

  for (int idx = 0; idx < domListSrcP.size(); ++idx)
  {
    CDomain* domain = (domainIndex != idx) ? domListSrcP[idx] : domListDestP[idx];
    domainDst.push_back(domain);
  }

  tmpGridDestination_ = CGrid::createGrid(domainDst, axisDst, gridDestination_->axis_domain_order);
  tmpGridDestination_->computeGridGlobalDimension(domainDst, axisDst, gridDestination_->axis_domain_order);
  tempGridDests_.push_back(tmpGridDestination_);
}

/*!
  Assign the current grid destination to the grid source in the new transformation.
The current grid destination plays the role of grid source in next transformation (if any).
Only element on which the transformation is performed is modified
  \param [in] elementPositionInGrid position of element in grid
  \param [in] transType transformation type
*/
void CGridTransformation::setUpGridSource(int elementPositionInGrid, ETranformationType transType, int nbTransformation)
{
  if (!tempGridSrcs_.empty() && (getNbAlgo()-1) == tempGridSrcs_.size())
  {
    tempGridSrcs_.resize(0);
  }

  std::vector<CAxis*> axisListDestP = tmpGridDestination_->getAxis();
  std::vector<CAxis*> axisListSrcP = gridSource_->getAxis(), axisSrc;

  std::vector<CDomain*> domListDestP = tmpGridDestination_->getDomains();
  std::vector<CDomain*> domListSrcP = gridSource_->getDomains(), domainSrc;

  int axisIndex = -1, domainIndex = -1;
  switch (transType)
  {
    case TRANS_INTERPOLATE_DOMAIN:
    case TRANS_ZOOM_DOMAIN:
      domainIndex = elementPosition2DomainPositionInGrid_[elementPositionInGrid];
      break;

    case TRANS_INTERPOLATE_AXIS:
    case TRANS_ZOOM_AXIS:
    case TRANS_INVERSE_AXIS:
      axisIndex =  elementPosition2AxisPositionInGrid_[elementPositionInGrid];
      break;
    default:
      break;
  }

  for (int idx = 0; idx < axisListSrcP.size(); ++idx)
  {
    if (axisIndex != idx)
    {
      CAxis* axis = axisListDestP[idx];
      axisSrc.push_back(axis);
    }
    else
    {
      CAxis* axis = CAxis::createAxis();
      axis->axis_ref.setValue(axisListDestP[idx]->getId());
      axis->solveRefInheritance(true);
      axis->checkAttributesOnClient();
      axisSrc.push_back(axis);
    }
  }

  for (int idx = 0; idx < domListSrcP.size(); ++idx)
  {
    if (domainIndex != idx)
    {
      CDomain* domain = domListDestP[idx];
      domainSrc.push_back(domain);
    }
    else
    {
      CDomain* domain = CDomain::createDomain();
      domain->domain_ref.setValue(domListDestP[idx]->getId());
      domain->solveRefInheritance(true);
      domain->checkAttributesOnClient();
      domainSrc.push_back(domain);
    }
  }

  gridSource_ = CGrid::createGrid(domainSrc, axisSrc, tmpGridDestination_->axis_domain_order);
  gridSource_->computeGridGlobalDimension(domainSrc, axisSrc, tmpGridDestination_->axis_domain_order);

  tempGridSrcs_.push_back(gridSource_);
}

/*!
  Perform all transformations
  For each transformation, there are some things to do:
  -) Chose the correct algorithm by transformation type and position of element
  -) Calculate the mapping of global index between the current grid source and grid destination
  -) Calculate the mapping of global index between current grid DESTINATION and grid SOURCE
  -) Make current grid destination become grid source in the next transformation
*/
void CGridTransformation::computeAll(const std::vector<CArray<double,1>* >& dataAuxInputs, Time timeStamp)
{
  if (nbAlgos_ < 1) return;
  if (!auxInputs_.empty() && !dynamicalTransformation_) { dynamicalTransformation_ = true; return; }
  if (dynamicalTransformation_)
  {
    if (timeStamp_.insert(timeStamp).second)   //Reset map
    {
      std::list<SendingIndexGridSourceMap>().swap(localIndexToSendFromGridSource_);
      std::list<RecvIndexGridDestinationMap>().swap(localIndexToReceiveOnGridDest_);
      std::list<size_t>().swap(nbLocalIndexOnGridDest_);
    }
    else
      return;
  }

  CContext* context = CContext::getCurrent();
  CContextClient* client = context->client;

  ListAlgoType::const_iterator itb = listAlgos_.begin(),
                               ite = listAlgos_.end(), it;

  CGenericAlgorithmTransformation* algo = 0;
  int nbAgloTransformation = 0; // Only count for executed transformation. Generate domain is a special one, not executed in the list
  for (it = itb; it != ite; ++it)
  {
    int elementPositionInGrid = it->first;
    ETranformationType transType = (it->second).first;
    int transformationOrder = (it->second).second;
    SourceDestinationIndexMap globaIndexWeightFromSrcToDst;

//    if (1 < nbAlgos_)
//    {
//      // Create a temporary grid destination which contains transformed element of grid destination and
//      // non-transformed elements fo grid source
////      if (nbAgloTransformation != (nbAlgos_-1)) setUpGridDestination(elementPositionInGrid, transType, nbAgloTransformation);
//    }
    setUpGridDestination(elementPositionInGrid, transType, nbAgloTransformation);

    // First of all, select an algorithm
    if (!dynamicalTransformation_ || (algoTransformation_.size() < listAlgos_.size()))
    {
      selectAlgo(elementPositionInGrid, transType, transformationOrder, algoTypes_[std::distance(itb, it)]);
      algo = algoTransformation_.back();
    }
    else
      algo = algoTransformation_[std::distance(itb, it)];

    if (0 != algo) // Only registered transformation can be executed
    {
      algo->computeIndexSourceMapping(dataAuxInputs);

      // ComputeTransformation of global index of each element
      int elementPosition = it->first;
      algo->computeGlobalSourceIndex(elementPosition,
                                     gridSource_,
                                     tmpGridDestination_,
                                     globaIndexWeightFromSrcToDst);

      // Compute transformation of global indexes among grids
      computeTransformationMapping(globaIndexWeightFromSrcToDst);

      if (1 < nbAlgos_)
      {
        // Now grid destination becomes grid source in a new transformation
        if (nbAgloTransformation != (nbAlgos_-1)) setUpGridSource(elementPositionInGrid, transType, nbAgloTransformation);
      }
      ++nbAgloTransformation;
    }
  }
}

/*!
  Compute exchange index between grid source and grid destination
  \param [in] globalIndexWeightFromDestToSource global index mapping between grid destination and grid source
*/
void CGridTransformation::computeTransformationMapping(const SourceDestinationIndexMap& globaIndexWeightFromSrcToDst)
{
  CContext* context = CContext::getCurrent();
  CContextClient* client = context->client;
  int nbClient = client->clientSize;
  int clientRank = client->clientRank;

  // Recalculate the distribution of grid destination
  CDistributionClient distributionClientDest(client->clientRank, tmpGridDestination_);
//  CDistributionClient distributionClientDest(client->clientRank, gridDestination_);
  CDistributionClient::GlobalLocalDataMap& globalLocalIndexGridDestSendToServer = distributionClientDest.getGlobalLocalDataSendToServer();
  const std::vector<int>& localMask = distributionClientDest.getLocalMaskIndexOnClient();

  // Update number of local index on each transformation
  size_t nbLocalIndex = globalLocalIndexGridDestSendToServer.size();
  nbLocalIndexOnGridDest_.push_back(nbLocalIndex);
  localMaskOnGridDest_.push_back(std::vector<bool>());
  std::vector<bool>& tmpMask = localMaskOnGridDest_.back();
  tmpMask.resize(nbLocalIndex,false);
//  for (int idx = 0; idx < nbLocalIndex; ++idx)
//  {
//    tmpMask[localMask[idx]] = true;
//  }

  // Find out number of index sent from grid source and number of index received on grid destination
  SourceDestinationIndexMap::const_iterator itbIndex = globaIndexWeightFromSrcToDst.begin(),
                                            iteIndex = globaIndexWeightFromSrcToDst.end(), itIndex;
  typedef boost::unordered_map<size_t, std::vector<std::pair<size_t,double> > > SendIndexMap;
  std::map<int,int> sendRankSizeMap,recvRankSizeMap;
  int connectedClient = globaIndexWeightFromSrcToDst.size();
  int* recvCount=new int[nbClient];
  int* displ=new int[nbClient];
  int* sendRankBuff=new int[connectedClient];
  int* sendSizeBuff=new int[connectedClient];
  int n = 0;
  for (itIndex = itbIndex; itIndex != iteIndex; ++itIndex, ++n)
  {
    sendRankBuff[n] = itIndex->first;
    const SendIndexMap& sendIndexMap = itIndex->second;
    SendIndexMap::const_iterator itbSend = sendIndexMap.begin(), iteSend = sendIndexMap.end(), itSend;
    int sendSize = 0;
    for (itSend = itbSend; itSend != iteSend; ++itSend)
    {
      sendSize += itSend->second.size();
    }
    sendSizeBuff[n] = sendSize;
    sendRankSizeMap[itIndex->first] = sendSize;
  }
  MPI_Allgather(&connectedClient,1,MPI_INT,recvCount,1,MPI_INT,client->intraComm);

  displ[0]=0 ;
  for(int n=1;n<nbClient;n++) displ[n]=displ[n-1]+recvCount[n-1];
  int recvSize=displ[nbClient-1]+recvCount[nbClient-1];
  int* recvRankBuff=new int[recvSize];
  int* recvSizeBuff=new int[recvSize];
  MPI_Allgatherv(sendRankBuff,connectedClient,MPI_INT,recvRankBuff,recvCount,displ,MPI_INT,client->intraComm);
  MPI_Allgatherv(sendSizeBuff,connectedClient,MPI_INT,recvSizeBuff,recvCount,displ,MPI_INT,client->intraComm);
  for (int i = 0; i < nbClient; ++i)
  {
    int currentPos = displ[i];
    for (int j = 0; j < recvCount[i]; ++j)
      if (recvRankBuff[currentPos+j] == clientRank)
      {
        recvRankSizeMap[i] = recvSizeBuff[currentPos+j];
      }
  }

  // Sending global index of grid source to corresponding process as well as the corresponding mask
  std::vector<MPI_Request> requests;
  std::vector<MPI_Status> status;
  boost::unordered_map<int, unsigned char* > recvMaskDst;
  boost::unordered_map<int, unsigned long* > recvGlobalIndexSrc;
  for (std::map<int,int>::const_iterator itRecv = recvRankSizeMap.begin(); itRecv != recvRankSizeMap.end(); ++itRecv)
  {
    int recvRank = itRecv->first;
    int recvSize = itRecv->second;
    recvMaskDst[recvRank] = new unsigned char [recvSize];
    recvGlobalIndexSrc[recvRank] = new unsigned long [recvSize];

    requests.push_back(MPI_Request());
    MPI_Irecv(recvGlobalIndexSrc[recvRank], recvSize, MPI_UNSIGNED_LONG, recvRank, 46, client->intraComm, &requests.back());
    requests.push_back(MPI_Request());
    MPI_Irecv(recvMaskDst[recvRank], recvSize, MPI_UNSIGNED_CHAR, recvRank, 47, client->intraComm, &requests.back());
  }

  boost::unordered_map<int, CArray<size_t,1> > globalIndexDst;
  boost::unordered_map<int, CArray<double,1> > weightDst;
  boost::unordered_map<int, unsigned char* > sendMaskDst;
  boost::unordered_map<int, unsigned long* > sendGlobalIndexSrc;
  for (itIndex = itbIndex; itIndex != iteIndex; ++itIndex)
  {
    int sendRank = itIndex->first;
    int sendSize = sendRankSizeMap[sendRank];
    const SendIndexMap& sendIndexMap = itIndex->second;
    SendIndexMap::const_iterator itbSend = sendIndexMap.begin(), iteSend = sendIndexMap.end(), itSend;
    globalIndexDst[sendRank].resize(sendSize);
    weightDst[sendRank].resize(sendSize);
    sendMaskDst[sendRank] = new unsigned char [sendSize];
    sendGlobalIndexSrc[sendRank] = new unsigned long [sendSize];
    int countIndex = 0;
    for (itSend = itbSend; itSend != iteSend; ++itSend)
    {
      const std::vector<std::pair<size_t,double> >& dstWeight = itSend->second;
      for (int idx = 0; idx < dstWeight.size(); ++idx)
      {
        globalIndexDst[sendRank](countIndex) = dstWeight[idx].first;
        weightDst[sendRank](countIndex) = dstWeight[idx].second;
        if (0 < globalLocalIndexGridDestSendToServer.count(dstWeight[idx].first))
          sendMaskDst[sendRank][countIndex] = 1;
        else
          sendMaskDst[sendRank][countIndex] = 0;
        sendGlobalIndexSrc[sendRank][countIndex] = itSend->first;
        ++countIndex;
      }
    }

    // Send global index source and mask
    requests.push_back(MPI_Request());
    MPI_Isend(sendGlobalIndexSrc[sendRank], sendSize, MPI_UNSIGNED_LONG, sendRank, 46, client->intraComm, &requests.back());
    requests.push_back(MPI_Request());
    MPI_Isend(sendMaskDst[sendRank], sendSize, MPI_UNSIGNED_CHAR, sendRank, 47, client->intraComm, &requests.back());
  }

  status.resize(requests.size());
  MPI_Waitall(requests.size(), &requests[0], &status[0]);

  // Okie, now use the mask to identify which index source we need to send, then also signal the destination which masked index we will return
  std::vector<MPI_Request>().swap(requests);
  std::vector<MPI_Status>().swap(status);
  // Okie, on destination side, we will wait for information of masked index of source
  for (std::map<int,int>::const_iterator itSend = sendRankSizeMap.begin(); itSend != sendRankSizeMap.end(); ++itSend)
  {
    int recvRank = itSend->first;
    int recvSize = itSend->second;

    requests.push_back(MPI_Request());
    MPI_Irecv(sendMaskDst[recvRank], recvSize, MPI_UNSIGNED_CHAR, recvRank, 48, client->intraComm, &requests.back());
  }

  // Ok, now we fill in local index of grid source (we even count for masked index)
  CDistributionClient distributionClientSrc(client->clientRank, gridSource_);
  CDistributionClient::GlobalLocalDataMap& globalLocalIndexGridSrcSendToServer = distributionClientSrc.getGlobalLocalDataSendToServer();
  localIndexToSendFromGridSource_.push_back(SendingIndexGridSourceMap());
  SendingIndexGridSourceMap& tmpSend = localIndexToSendFromGridSource_.back();
  for (std::map<int,int>::const_iterator itRecv = recvRankSizeMap.begin(); itRecv != recvRankSizeMap.end(); ++itRecv)
  {
    int recvRank = itRecv->first;
    int recvSize = itRecv->second;
    unsigned char* recvMask = recvMaskDst[recvRank];
    unsigned long* recvIndexSrc = recvGlobalIndexSrc[recvRank];
    int realSendSize = 0;
    for (int idx = 0; idx < recvSize; ++idx)
    {
      if (0 != (*(recvMask+idx))) // OKie, now we have a demand from non-masked index destination
        if (0 < globalLocalIndexGridSrcSendToServer.count(*(recvIndexSrc+idx))) // check whether index source is masked
         ++realSendSize;
        else // inform the destination that this index is masked
         *(recvMask+idx) = 0;
    }

    tmpSend[recvRank].resize(realSendSize);
    realSendSize = 0;
    for (int idx = 0; idx < recvSize; ++idx)
    {
      if (0 != (*(recvMask+idx))) // OKie, now we have a demand from non-masked index destination
      {
        tmpSend[recvRank](realSendSize) = globalLocalIndexGridSrcSendToServer[*(recvIndexSrc+idx)];
         ++realSendSize;
      }
    }

    // Okie, now inform the destination which source index are masked
    requests.push_back(MPI_Request());
    MPI_Isend(recvMaskDst[recvRank], recvSize, MPI_UNSIGNED_CHAR, recvRank, 48, client->intraComm, &requests.back());
  }
  status.resize(requests.size());
  MPI_Waitall(requests.size(), &requests[0], &status[0]);

  // Cool, now we can fill in local index of grid destination (counted for masked index)
  localIndexToReceiveOnGridDest_.push_back(RecvIndexGridDestinationMap());
  RecvIndexGridDestinationMap& recvTmp = localIndexToReceiveOnGridDest_.back();
  for (std::map<int,int>::const_iterator itSend = sendRankSizeMap.begin(); itSend != sendRankSizeMap.end(); ++itSend)
  {
    int recvRank = itSend->first;
    int recvSize = itSend->second;
    unsigned char* recvMask = sendMaskDst[recvRank];

    CArray<size_t,1>& recvIndexDst = globalIndexDst[recvRank];
    CArray<double,1>& recvWeightDst = weightDst[recvRank];
    int realRecvSize = 0;
    for (int idx = 0; idx < recvSize; ++idx)
    {
      if (0 != *(recvMask+idx)) // OKie, now we have a non-masked index destination
         ++realRecvSize;
    }

    int localIndexDst;
    recvTmp[recvRank].resize(realRecvSize);
    realRecvSize = 0;
    for (int idx = 0; idx < recvSize; ++idx)
    {
      if (0 != *(recvMask+idx)) // OKie, now we have a demand from non-masked index destination
      {
        recvTmp[recvRank][realRecvSize].first = globalLocalIndexGridDestSendToServer[recvIndexDst(idx)];
        recvTmp[recvRank][realRecvSize].second = recvWeightDst(idx);
         ++realRecvSize;
      }
    }
  }

  delete [] recvCount;
  delete [] displ;
  delete [] sendRankBuff;
  delete [] recvRankBuff;
  delete [] sendSizeBuff;
  delete [] recvSizeBuff;

  boost::unordered_map<int, unsigned char* >::const_iterator itChar;
  for (itChar = sendMaskDst.begin(); itChar != sendMaskDst.end(); ++itChar)
    delete [] itChar->second;
  for (itChar = recvMaskDst.begin(); itChar != recvMaskDst.end(); ++itChar)
    delete [] itChar->second;
  boost::unordered_map<int, unsigned long* >::const_iterator itLong;
  for (itLong = sendGlobalIndexSrc.begin(); itLong != sendGlobalIndexSrc.end(); ++itLong)
    delete [] itLong->second;
  for (itLong = recvGlobalIndexSrc.begin(); itLong != recvGlobalIndexSrc.end(); ++itLong)
    delete [] itLong->second;

}

bool CGridTransformation::isSpecialTransformation(ETranformationType transType)
{
  bool res;
  switch (transType)
  {
    case TRANS_GENERATE_RECTILINEAR_DOMAIN:
     res = true;
     break;
    default:
     res = false;
     break;
  }

  return res;
}

/*!
  Local index of data which need sending from the grid source
  \return local index of data
*/
const std::list<CGridTransformation::SendingIndexGridSourceMap>& CGridTransformation::getLocalIndexToSendFromGridSource() const
{
  return localIndexToSendFromGridSource_;
}

/*!
  Local index of data which will be received on the grid destination
  \return local index of data
*/
const std::list<CGridTransformation::RecvIndexGridDestinationMap>& CGridTransformation::getLocalIndexToReceiveOnGridDest() const
{
  return localIndexToReceiveOnGridDest_;
}

/*!
 Number of index will be received on the grid destination
  \return number of index of data
*/
const std::list<size_t>& CGridTransformation::getNbLocalIndexToReceiveOnGridDest() const
{
  return nbLocalIndexOnGridDest_;
}

/*!
  Local mask of data which will be received on the grid destination
  \return local mask of data
*/
const std::list<std::vector<bool> >& CGridTransformation::getLocalMaskIndexOnGridDest() const
{
  return localMaskOnGridDest_;
}

}