source: XIOS/dev/XIOS_DEV_CMIP6/src/io/nc4_data_input.cpp @ 1428

Last change on this file since 1428 was 1428, checked in by oabramkina, 7 years ago

Bugfix for reading of curvilinear and unstructured domains.

Since r1419 reading of attributes of curvilinear and unstructured domains by client processes is done locally. Processes that don't have a local domain defined will read just one value in order to avoid blocking.

  • Property copyright set to
    Software name : XIOS (Xml I/O Server)
    http://forge.ipsl.jussieu.fr/ioserver
    Creation date : January 2009
    Licence : CeCCIL version2
    see license file in root directory : Licence_CeCILL_V2-en.txt
    or http://www.cecill.info/licences/Licence_CeCILL_V2-en.html
    Holder : CEA/LSCE (Laboratoire des Sciences du CLimat et de l'Environnement)
    CNRS/IPSL (Institut Pierre Simon Laplace)
    Project Manager : Yann Meurdesoif
    yann.meurdesoif@cea.fr
File size: 23.1 KB
Line 
1#include "nc4_data_input.hpp"
2
3#include "context.hpp"
4#include "context_server.hpp"
5#include "context_client.hpp"
6#include "domain.hpp"
7#include "axis.hpp"
8#include "scalar.hpp"
9
10namespace xios
11{
12  CNc4DataInput::CNc4DataInput(const StdString& filename, MPI_Comm comm_file, bool multifile, bool isCollective /*= true*/, const StdString& timeCounterName /*= "time_counter"*/)
13    : SuperClass()
14    , SuperClassWriter(filename, &comm_file, multifile, timeCounterName)
15    , comm_file(comm_file)
16    , filename(filename)
17    , isCollective(isCollective)
18    , readMetaDataDomains_(), readValueDomains_()
19    , readMetaDataAxis_(), readValueAxis_()
20    , readMetaDataScalar_(), readValueScalar_()
21  {
22    SuperClass::type = multifile ? MULTI_FILE : ONE_FILE;
23  }
24
25  CNc4DataInput::~CNc4DataInput(void)
26  { /* Nothing more to do */ }
27
28  StdSize CNc4DataInput::getFieldNbRecords_(CField* field)
29  {
30    StdString fieldId = field->getFieldOutputName();
31
32    if (SuperClassWriter::isTemporal(fieldId))
33    {
34//      return SuperClassWriter::getDimensions(&fieldId)[SuperClassWriter::getUnlimitedDimensionName()];
35      return SuperClassWriter::getDimensions(&fieldId)[SuperClassWriter::getTimeCounterName()];
36    }
37
38    return 1;
39  }
40
41  void CNc4DataInput::readFieldData_(CField* field)
42  {
43    CContext* context = CContext::getCurrent();
44    CContextServer* server = context->server;
45
46    CGrid* grid = field->grid;
47
48    if (!grid->doGridHaveDataToWrite())
49      if (SuperClass::type==MULTI_FILE || !isCollective) return;
50
51    StdString fieldId = field->getFieldOutputName();
52
53    CArray<double,1> fieldData(grid->getWrittenDataSize());
54    if (!field->default_value.isEmpty()) fieldData = field->default_value;
55
56    switch (SuperClass::type)
57    {
58      case MULTI_FILE:
59        SuperClassWriter::getData(fieldData, fieldId, isCollective, (field->getNStep() - 1)%field->nstepMax );
60        break;
61      case ONE_FILE:
62      {
63/*
64        std::vector<int> nZoomBeginGlobal = grid->getDistributionServer()->getZoomBeginGlobal();
65        std::vector<int> nZoomBeginServer = grid->getDistributionServer()->getZoomBeginServer();
66        std::vector<int> nZoomSizeServer  = grid->getDistributionServer()->getZoomSizeServer();
67
68        int ssize = nZoomBeginGlobal.size();
69
70        std::vector<StdSize> start(ssize);
71        std::vector<StdSize> count(ssize);
72
73        for (int i = 0; i < ssize; ++i)
74        {
75          start[i] = nZoomBeginServer[ssize - i - 1] - nZoomBeginGlobal[ssize - i - 1];
76          count[i] = nZoomSizeServer[ssize - i - 1];
77        }
78*/
79
80        std::vector<int> nZoomBeginGlobal = grid->getDistributionServer()->getZoomBeginGlobal();
81        std::vector<int> nZoomBeginServer = grid->getDistributionServer()->getZoomBeginServer();
82        std::vector<int> nZoomSizeServer  = grid->getDistributionServer()->getZoomSizeServer();
83
84        std::vector<StdSize> start, count;
85
86        CArray<int,1> axisDomainOrder = grid->axis_domain_order;
87        std::vector<StdString> domainList = grid->getDomainList();
88        std::vector<StdString> axisList   = grid->getAxisList();
89        int numElement = axisDomainOrder.numElements();
90        int idxDomain = domainList.size() - 1, idxAxis = axisList.size() - 1;
91        int idx = nZoomBeginGlobal.size() - 1;
92
93        start.reserve(nZoomBeginGlobal.size());
94        count.reserve(nZoomBeginGlobal.size());
95
96        for (int i = numElement - 1; i >= 0; --i)
97        {
98          if (2 == axisDomainOrder(i))
99          {
100            CDomain* domain = CDomain::get(domainList[idxDomain]);
101            if ((domain->type) != CDomain::type_attr::unstructured)
102            {
103              start.push_back(nZoomBeginServer[idx] - nZoomBeginGlobal[idx]);
104              count.push_back(nZoomSizeServer[idx]);
105            }
106            --idx ;
107            start.push_back(nZoomBeginServer[idx] - nZoomBeginGlobal[idx]);
108            count.push_back(nZoomSizeServer[idx]);
109            --idx ;
110            --idxDomain;
111          }
112          else if (1 == axisDomainOrder(i))
113          {
114            start.push_back(nZoomBeginServer[idx] - nZoomBeginGlobal[idx]);
115            count.push_back(nZoomSizeServer[idx]);
116            --idx;
117          }
118          else
119          {
120            if (1 == axisDomainOrder.numElements())
121            {
122              start.push_back(0);
123              count.push_back(1);
124            }
125            --idx;
126          }
127        }
128
129        SuperClassWriter::getData(fieldData, fieldId, isCollective, (field->getNStep() - 1)%field->nstepMax, &start, &count);
130        break;
131      }
132    }
133
134    field->inputField(fieldData);
135
136    if (!field->scale_factor.isEmpty() || !field->add_offset.isEmpty())
137    {
138      double scaleFactor = 1.0, addOffset = 0.0;
139      if (!field->scale_factor.isEmpty()) scaleFactor = field->scale_factor;
140      if (!field->add_offset.isEmpty()) addOffset = field->add_offset;
141      field->invertScaleFactorAddOffset(scaleFactor, addOffset);
142    }
143  }
144
145  void CNc4DataInput::readFieldAttributes_(CField* field, bool readAttributeValues)
146  {
147    StdString fieldId = field->getFieldOutputName();
148
149    CGrid* grid = field->grid;
150
151    std::vector<CDomain*> domainP = grid->getDomains();
152    std::vector<CAxis*> axisP = grid->getAxis();
153    std::vector<CScalar*> scalarP = grid->getScalars();
154    int gridDim = domainP.size() * 2 + axisP.size();
155
156    // Nothing to do with scalar without timestep
157    if ((0 == gridDim) && (!SuperClassWriter::isTemporal(fieldId))) 
158      return;
159
160    // Verify the compatibility of dimension of declared grid and real grid in file
161    int realGridDim = 1;
162    bool isUnstructuredGrid = SuperClassWriter::isUnstructured(fieldId);
163    std::map<StdString, StdSize> dimSizeMap = SuperClassWriter::getDimensions(&fieldId);
164    std::list<StdString> dimList = SuperClassWriter::getDimensionsList(&fieldId);
165
166    realGridDim = SuperClassWriter::isTemporal(fieldId) ? dimSizeMap.size() - 1 : dimSizeMap.size();
167    if (isUnstructuredGrid) ++realGridDim;
168
169    if (gridDim != realGridDim)
170       ERROR("CNc4DataInput::readFieldAttributes_(CField* field, bool readAttributeValues)",
171        << "Field '" << fieldId << "' has incorrect dimension " << std::endl
172        << "Verify dimension of grid defined by 'grid_ref' or 'domain_ref'/'axis_ref' and dimension of grid in read file.");
173
174    // Remove unlimited dimension from the map, we dont need it anymore
175    if (SuperClassWriter::isTemporal(fieldId))
176    {
177      dimSizeMap.erase(SuperClassWriter::getUnlimitedDimensionName());
178      dimList.pop_front() ;  // assume time dimension is first
179    }
180
181    std::list<std::pair<StdString, StdSize> > listDimSize;
182/*
183    for (std::map<StdString, StdSize>::const_iterator itMap = dimSizeMap.begin(); itMap != dimSizeMap.end(); ++itMap)
184      listDimSize.push_front(*itMap);
185*/
186    for (std::list<StdString>::const_iterator it = dimList.begin(); it != dimList.end(); ++it)
187      listDimSize.push_front(*dimSizeMap.find(*it));
188
189    // Now process domain and axis
190    CArray<int,1> axisDomainOrder = grid->axis_domain_order;
191    int numElement = domainP.size() + axisP.size() + scalarP.size();
192    int elementPosition = 0;
193    int idxDomain = 0, idxAxis = 0, idxScalar = 0;
194
195    std::pair<std::set<StdString>::iterator,bool> it;
196    for (int i = 0; i < numElement; ++i)
197    {
198      if(2 == axisDomainOrder(i))
199      {
200        if (readAttributeValues)
201        {
202           it = readValueDomains_.insert(domainP[idxDomain]->getId());
203           if (it.second) readDomainAttributeValueFromFile(domainP[idxDomain], listDimSize, elementPosition, fieldId);
204        }
205        else
206        {
207          it = readMetaDataDomains_.insert(domainP[idxDomain]->getId());
208          if (it.second) readDomainAttributesFromFile(domainP[idxDomain], listDimSize, elementPosition, fieldId);
209        }
210        ++idxDomain;
211        if (isUnstructuredGrid) ++elementPosition;
212        else elementPosition += 2;
213      }
214      else if (1 == axisDomainOrder(i))
215      {
216        if (readAttributeValues)
217        {
218          it = readValueAxis_.insert(axisP[idxAxis]->getId());
219          if (it.second) readAxisAttributeValueFromFile(axisP[idxAxis], listDimSize, elementPosition, fieldId);
220        }
221        else
222        {
223          it = readMetaDataAxis_.insert(axisP[idxAxis]->getId());
224          if (it.second) readAxisAttributesFromFile(axisP[idxAxis], listDimSize, elementPosition, fieldId);
225        }
226        ++idxAxis;
227        ++elementPosition;
228      }
229      else
230      {
231        if (readAttributeValues)
232        {
233          it = readValueScalar_.insert(scalarP[idxScalar]->getId());
234          if (it.second) readScalarAttributeValueFromFile(scalarP[idxScalar], listDimSize, elementPosition, fieldId);
235        }
236        else
237        {
238          it = readMetaDataScalar_.insert(scalarP[idxScalar]->getId());
239          if (it.second) readScalarAttributesFromFile(scalarP[idxScalar], listDimSize, elementPosition, fieldId);
240        }
241        ++idxScalar;
242        ++elementPosition;
243      }
244    }
245  }
246
247  /*!
248    Read attributes of a domain from a file
249    \param [in] domain domain whose attributes are read from the file
250    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
251    \param [in] emelentPosition position of domain in grid
252    \param [in] fieldId id (or name) associated with the grid
253  */
254  void CNc4DataInput::readDomainAttributeValueFromFile(CDomain* domain, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
255                                                       int elementPosition, const StdString& fieldId)
256  {
257    // There are some optional attributes of a domain to retrieve from file    // + lon lat?
258    std::list<std::pair<StdString, StdSize> >::const_iterator itMapNi = dimSizeMap.begin(), itMapNj,
259                                                              iteMap  = dimSizeMap.end();
260
261    for (int i = 0; i < elementPosition; ++i, ++itMapNi) {}
262    itMapNj = itMapNi; ++itMapNj;
263
264    if ((CDomain::type_attr::rectilinear == domain->type))
265    {
266      // Ok, try to read some attributes such as longitude and latitude
267      bool hasLat = SuperClassWriter::hasVariable(itMapNj->first);
268      if (hasLat)
269      {
270        domain->latvalue_rectilinear_read_from_file.resize(itMapNj->second);
271        std::vector<StdSize> nBeginLat(1, 0), nSizeLat(1, itMapNj->second);
272        readFieldVariableValue(domain->latvalue_rectilinear_read_from_file, itMapNj->first, nBeginLat, nSizeLat, true);
273      }
274
275      bool hasLon = SuperClassWriter::hasVariable(itMapNi->first);
276      if (hasLon)
277      {
278        domain->lonvalue_rectilinear_read_from_file.resize(itMapNi->second);
279        std::vector<StdSize> nBeginLon(1, 0), nSizeLon(1, itMapNi->second);
280        readFieldVariableValue(domain->lonvalue_rectilinear_read_from_file, itMapNi->first, nBeginLon, nSizeLon, true);
281      }     
282    }
283    else if ((CDomain::type_attr::curvilinear == domain->type))
284    {
285      // Make sure that if there is no local domain defined on a process, the process still reads just one value.
286      int ni, nj, ibegin, jbegin;
287      if (domain->ni == 0)
288      {
289        ni = 1;
290        ibegin = 0;
291      }
292      else
293      {
294        ni = domain->ni;
295        ibegin = domain->ibegin;
296      }
297      if (domain->nj == 0)
298      {
299        nj = 1;
300        jbegin = 0;
301      }
302      else
303      {
304        nj = domain->nj;
305        jbegin = domain->jbegin;
306      }
307
308      std::vector<StdSize> nBeginLatLon(2), nSizeLatLon(2);
309      nBeginLatLon[0] = jbegin; nBeginLatLon[1] = ibegin;
310      nSizeLatLon[0]  = nj; nSizeLatLon[1] = ni;
311
312      StdString latName = this->getLatCoordName(fieldId);
313      if (SuperClassWriter::hasVariable(latName))
314      {
315        domain->latvalue_curvilinear_read_from_file.resize(ni, nj);
316        readFieldVariableValue(domain->latvalue_curvilinear_read_from_file, latName, nBeginLatLon, nSizeLatLon);
317      }
318      StdString lonName = this->getLonCoordName(fieldId);
319      if (SuperClassWriter::hasVariable(lonName))
320      {
321        domain->lonvalue_curvilinear_read_from_file.resize(ni, nj);
322        readFieldVariableValue(domain->lonvalue_curvilinear_read_from_file, lonName, nBeginLatLon, nSizeLatLon);
323      }
324
325      StdString boundsLatName = this->getBoundsId(latName);
326      StdString boundsLonName = this->getBoundsId(lonName);
327
328      int nbVertex = this->getNbVertex(fieldId);
329      if (!domain->nvertex.isEmpty() && (domain->nvertex != nbVertex))
330      {
331        ERROR("void CNc4DataInput::readDomainAttributeValueFromFile(...)",
332          << "The domain " << domain->getDomainOutputName()
333          << " has nvertex read from file " << this->filename << " and nvertex provided from model"
334          << " are not coherent. They should be the same." << std::endl
335          << " nvertex read from file: "<< nbVertex
336          << " nvertex from model: "<< domain->nvertex << std::endl);
337      } 
338
339      if (SuperClassWriter::hasVariable(boundsLatName) || SuperClassWriter::hasVariable(boundsLonName)) 
340        domain->nvertex.setValue(nbVertex);
341
342      std::vector<StdSize> nBeginBndsLatLon(3), nSizeBndsLatLon(3);
343      nBeginBndsLatLon[0] = jbegin; nSizeBndsLatLon[0] = nj;
344      nBeginBndsLatLon[1] = ibegin; nSizeBndsLatLon[1] = ni;
345      nBeginBndsLatLon[2] = 0; nSizeBndsLatLon[2] = nbVertex;
346
347      if (SuperClassWriter::hasVariable(boundsLatName))
348      {
349        domain->bounds_latvalue_curvilinear_read_from_file.resize(nbVertex, ni, nj);
350        readFieldVariableValue(domain->bounds_latvalue_curvilinear_read_from_file, boundsLatName, nBeginBndsLatLon, nSizeBndsLatLon);
351
352      }
353      if (SuperClassWriter::hasVariable(boundsLonName)) 
354      {
355        domain->bounds_lonvalue_curvilinear_read_from_file.resize(nbVertex, ni, nj);
356        readFieldVariableValue(domain->bounds_lonvalue_curvilinear_read_from_file, boundsLonName, nBeginBndsLatLon, nSizeBndsLatLon);
357      }     
358    }
359    else if ((CDomain::type_attr::unstructured == domain->type))// || (this->isUnstructured(fieldId)))
360    {
361      // Make sure that if there is no local domain defined on a process, the process still reads just one value.
362      int ni, ibegin;
363      if (domain->ni == 0)
364      {
365        ni = 1;
366        ibegin = 0;
367      }
368      else
369      {
370        ni = domain->ni;
371        ibegin = domain->ibegin;
372      }
373
374      std::vector<StdSize> nBeginLatLon(1,0), nSizeLatLon(1,0);
375      nBeginLatLon[0] = ibegin;
376      nSizeLatLon[0]  = ni;
377
378      StdString latName = this->getLatCoordName(fieldId);
379      if (SuperClassWriter::hasVariable(latName))
380      {
381        domain->latvalue_unstructured_read_from_file.resize(ni);
382        readFieldVariableValue(domain->latvalue_unstructured_read_from_file, latName, nBeginLatLon, nSizeLatLon); 
383      }
384
385      StdString lonName = this->getLonCoordName(fieldId);
386      if (SuperClassWriter::hasVariable(lonName)) //(0 != lonName.compare(""))
387      {
388        domain->lonvalue_unstructured_read_from_file.resize(ni);
389        readFieldVariableValue(domain->lonvalue_unstructured_read_from_file, lonName, nBeginLatLon, nSizeLatLon);
390      }
391
392      StdString boundsLatName = this->getBoundsId(latName);
393      StdString boundsLonName = this->getBoundsId(lonName);
394
395      int nbVertex = this->getNbVertex(fieldId);
396      if (!domain->nvertex.isEmpty() && (domain->nvertex != nbVertex))
397      {
398        ERROR("void CNc4DataInput::readDomainAttributeValueFromFile(...)",
399          << "The domain " << domain->getDomainOutputName()
400          << " has nvertex read from file " << this->filename << " and nvertex provided from model"
401          << " are not coherent. They should be the same." << std::endl
402          << " nvertex read from file: "<< nbVertex
403          << " nvertex from model: "<< domain->nvertex << std::endl);
404      } 
405     
406      if (SuperClassWriter::hasVariable(boundsLatName) || SuperClassWriter::hasVariable(boundsLonName)) 
407        domain->nvertex.setValue(nbVertex);
408
409      std::vector<StdSize> nBeginBndsLatLon(2), nSizeBndsLatLon(2);
410      nBeginBndsLatLon[0] = ibegin; nSizeBndsLatLon[0] = ni;
411      nBeginBndsLatLon[1] = 0; nSizeBndsLatLon[1] = nbVertex;
412
413      if (SuperClassWriter::hasVariable(boundsLatName)) 
414      {
415        domain->bounds_latvalue_unstructured_read_from_file.resize(nSizeBndsLatLon[1], nSizeBndsLatLon[0]);
416        readFieldVariableValue(domain->bounds_latvalue_unstructured_read_from_file, boundsLatName, nBeginBndsLatLon, nSizeBndsLatLon);
417      }
418
419      if (SuperClassWriter::hasVariable(boundsLonName)) 
420      {
421        domain->bounds_lonvalue_unstructured_read_from_file.resize(nSizeBndsLatLon[1], nSizeBndsLatLon[0]);
422        readFieldVariableValue(domain->bounds_lonvalue_unstructured_read_from_file, boundsLonName, nBeginBndsLatLon, nSizeBndsLatLon);
423      }     
424    }
425    domain->fillInLonLat();
426  }
427
428  /*!
429    Read attribute value of a domain from a file
430    \param [in] domain domain whose attributes are read from the file
431    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
432    \param [in] emelentPosition position of domain in grid
433    \param [in] fieldId id (or name) associated with the grid
434  */
435  void CNc4DataInput::readDomainAttributesFromFile(CDomain* domain, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
436                                                   int elementPosition, const StdString& fieldId)
437  {
438    // There are some mandatory attributes of a domain to retrieve from file
439    // + ni_glo, nj_glo
440    std::list<std::pair<StdString, StdSize> >::const_iterator itMapNi = dimSizeMap.begin(), itMapNj,
441                                                              iteMap  = dimSizeMap.end();
442    for (int i = 0; i < elementPosition; ++i, ++itMapNi) {}
443    itMapNj = itMapNi; ++itMapNj;
444
445    if (this->isRectilinear(fieldId) || this->isCurvilinear(fieldId))
446    {
447      if (!domain->nj_glo.isEmpty() && (domain->nj_glo != itMapNj->second))
448      {
449        ERROR("void CNc4DataInput::readDomainAttributesFromFile(...)",
450          << "The domain " << domain->getDomainOutputName()
451          << " has nj_glo read from file " << this->filename << " and nj_glo provided from model"
452          << " are not coherent. They should be the same." << std::endl
453          << " nj_glo read from file: "<< itMapNj->second
454          << " nj_glo from model: "<< domain->nj_glo << std::endl);
455      } 
456      domain->nj_glo.setValue(itMapNj->second);
457
458      if (!domain->ni_glo.isEmpty() && (domain->ni_glo != itMapNi->second))
459      {
460        ERROR("void CNc4DataInput::readDomainAttributesFromFile(...)",
461          << "The domain " << domain->getDomainOutputName()
462          << " has ni_glo read from file " << this->filename << " and ni_glo provided from model"
463          << " are not coherent. They should be the same." << std::endl
464          << " ni_glo read from file: "<< itMapNi->second
465          << " ni_glo from model: "<< domain->ni_glo << std::endl);
466      } 
467      domain->ni_glo.setValue(itMapNi->second);
468    }
469    else if (this->isUnstructured(fieldId))
470    {
471      domain->nj_glo.setValue(1);
472
473      if (!domain->ni_glo.isEmpty() && (domain->ni_glo != itMapNi->second))
474      {
475        ERROR("void CNc4DataInput::readDomainAttributesFromFile(...)",
476          << "The domain " << domain->getDomainOutputName()
477          << " has ni_glo read from file " << this->filename << " and ni_glo provided from model"
478          << " are not coherent. They should be the same." << std::endl
479          << " ni_glo read from file: "<< itMapNi->second
480          << " ni_glo from model: "<< domain->ni_glo << std::endl);
481      }       
482      domain->ni_glo.setValue(itMapNi->second);
483    }
484  }
485
486  /*!
487    Read attributes of an axis from a file
488    \param [in] axis axis whose attributes are read from the file
489    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
490    \param [in] emelentPosition position of axis in grid
491    \param [in] fieldId id (or name) associated with the grid
492  */
493  void CNc4DataInput::readAxisAttributesFromFile(CAxis* axis, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
494                                                 int elementPosition, const StdString& fieldId)
495  {
496    std::list<std::pair<StdString, StdSize> >::const_iterator itMapN = dimSizeMap.begin(),
497                                                              iteMap = dimSizeMap.end();
498    for (int i = 0; i < elementPosition; ++i, ++itMapN) {}
499
500    if (!axis->n_glo.isEmpty() && (axis->n_glo != itMapN->second))
501    {
502      ERROR("void CNc4DataInput::readAxisAttributesFromFile(...)",
503        << "The axis " << axis->getAxisOutputName()
504        << " has n_glo read from file " << this->filename << " and n_glo provided from model"
505        << " are not coherent. They should be the same." << std::endl
506        << " n_glo read from file: "<< itMapN->second
507        << " n_glo from model: "<< axis->n_glo << std::endl);
508    }   
509    axis->n_glo.setValue(itMapN->second);
510  }
511
512  /*!
513    Read attribute value of an axis from a file
514    \param [in] axis axis whose attributes are read from the file
515    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
516    \param [in] emelentPosition position of axis in grid
517    \param [in] fieldId id (or name) associated with the grid
518  */
519  void CNc4DataInput::readAxisAttributeValueFromFile(CAxis* axis, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
520                                                    int elementPosition, const StdString& fieldId)
521  {
522    std::list<std::pair<StdString, StdSize> >::const_iterator itMapN = dimSizeMap.begin(),
523                                                              iteMap = dimSizeMap.end();
524    for (int i = 0; i < elementPosition; ++i, ++itMapN) {}
525
526    { // Read axis value
527      bool hasValue = SuperClassWriter::hasVariable(itMapN->first);
528      if (hasValue)
529      {
530        std::vector<StdSize> nBegin(1, 0), nSize(1, itMapN->second);
531        CArray<double,1> readAxisValue(itMapN->second);
532        readFieldVariableValue(readAxisValue, itMapN->first, nBegin, nSize, true);
533        int begin = 0, n = itMapN->second;
534        if (!axis->begin.isEmpty()) begin = axis->begin.getValue();
535        if (!axis->n.isEmpty()) n = axis->n.getValue();
536        axis->value.resize(n);
537        for (int i = 0; i < n; ++i) axis->value(i) = readAxisValue(begin + i);
538      }
539    }
540  }
541
542  /*!
543    Read attributes of a scalar from a file
544    \param [in] scalar scalar whose attributes are read from the file
545    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
546    \param [in] emelentPosition position of scalar in grid
547    \param [in] fieldId id (or name) associated with the grid
548  */
549  void CNc4DataInput::readScalarAttributesFromFile(CScalar* scalar, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
550                                                  int elementPosition, const StdString& fieldId)
551  {
552    /*Nothing to do */
553  }
554
555  /*!
556    Read attribute value of an axis from a file
557    \param [in] axis axis whose attributes are read from the file
558    \param [in] dimSizeMap Dimensions and and their corresponding names and size read from file
559    \param [in] emelentPosition position of axis in grid
560    \param [in] fieldId id (or name) associated with the grid
561  */
562  void CNc4DataInput::readScalarAttributeValueFromFile(CScalar* scalar, std::list<std::pair<StdString, StdSize> >& dimSizeMap,
563                                                      int elementPosition, const StdString& fieldId)
564  {
565    /*Nothing to do */
566  }
567
568  void CNc4DataInput::closeFile_(void)
569  {
570    SuperClassWriter::close();
571  }
572} // namespace xios
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