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src/ParamGetImpl/LocalFileInterface/FileReaderNetCDF.hh 2.35 KB
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/*
 * FileReaderNetCDF.hh
 *
 *  Created on: Feb 08, 2018
 *  Author: AKKA
 */

#ifndef FILEREADERNETCDF_HH_
#define FILEREADERNETCDF_HH_

#include "FileReaderAbstract.hh"

#include "netcdf.h"

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#include <vector>

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namespace AMDA {
namespace LocalFileInterface {

/*
 * @brief Implementation of the class FileReaderAbstract to load a netCDF file format
 */
class FileReaderNetCDF : public FileReaderAbstract
{
public:
	/*
	 * @brief Constructor
	 */
	FileReaderNetCDF();

	/*
	 * @brief Destructor
	 */
	virtual ~FileReaderNetCDF();

	/*
	 * @brief Open a netCDF file
	 */
	virtual bool open(std::string filePath);

	/*
	 * @brief Close the netCDF file
	 */
	virtual bool close(void);

	/*
	 * @brief Test if a netCDF file is currently opened
	 */
	virtual bool isOpened(void);

	/*
	 * @brief Get the id of the time param to use.
	 */
	virtual std::string getTimeParamId(void);

	/*
	 * @brief Get a param type and a param size in the netCDF file
	 */
	virtual bool getParamInfo(std::string& paramId, LocalParamType& paramType, int& dim1Size, int& dim2Size);

	/*
	 * @brief Get the index of the nearest record of time (the higher one) in the netCDF file
	 */
	virtual int getRecordIndex(std::string& timeId, double time);

	/*
	 * @brief Get a param packet from the netCDF file
	 */
	virtual FileReaderStatus getParamPacketData(std::string& timeId, std::string& paramId,
			int recordIndex, double stopTime, LocalParamDataPacket *packet);

	/*
	 * @brief Get an information
	 */
	virtual bool getInfo(const char* pInfoName, std::vector<double>& res);

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private:
	struct NetCDFDim {
		int    id;
		char   name[NC_MAX_NAME+1];
		size_t length;
		bool   isUnlimited;
	};

	struct NetCDFAtt {
		int     id;
		char    name[NC_MAX_NAME+1];
		size_t  length;
		nc_type type;
	};

	struct NetCDFVar {
		int       id;
		char      name[NC_MAX_NAME+1];
		std::vector<int> dimids;
		std::vector<NetCDFAtt> atts;
		nc_type   type;
		void* buffer;
		int valuesize;
	};

	struct NetCDFFile {
		int       id;
		std::vector<NetCDFDim> dims;
		std::vector<NetCDFVar> vars;
		std::vector<NetCDFAtt> atts;
	};

	NetCDFFile _file;

	void resetFile();

	bool loadNetCDFFileInfo();

	int getNbVarRecords(const NetCDFVar& var);

	int getNbVarValuesByRecord(const NetCDFVar& var);

	bool loadData(NetCDFVar& var);

	std::string getErrorMessage(int status);
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};

} /* LocalFileInterface */
} /* AMDA */

#endif /* FILEREADERNETCDF_HH_ */