conditions::StreamCSVLoader Class Reference

Specialization of the GeneralCSVLoader for loading from a file/stream. More...

#include <GeneralCSVLoader.h>

Public Member Functions
	StreamCSVLoader (const std::string &filename)
	Constructor a loader from the provided file name.
	StreamCSVLoader (std::istream &stream)
	Construct a loader from the provided input stream.
virtual	~StreamCSVLoader ()
	Clean-up the stream if we own it.
Public Member Functions inherited from conditions::GeneralCSVLoader
virtual	~GeneralCSVLoader ()
	Destructor.
std::vector< std::string >	columnNames () const
	Get the column names.
bool	nextRow ()
	Advance to next row if possible.
const std::string &	get (const std::string &colname, bool ignore_case=true) const
	Get the value for the given column in the current row.
int	getInteger (const std::string &colname, bool ignore_case=true) const
	Get the value for the given column in the current row as an integer.

Protected Member Functions
virtual std::string	getNextLine ()
	Get the next line, returning an empty string when there is no further data.

Private Attributes
std::istream *	source_
	The stream.
bool	ownStream_
	Own stream?
std::string	line_
	Line buffer.

Detailed Description

Specialization of the GeneralCSVLoader for loading from a file/stream.

Definition at line 85 of file GeneralCSVLoader.h.

Constructor & Destructor Documentation

StreamCSVLoader() [1/2]

conditions::StreamCSVLoader::StreamCSVLoader

(

const std::string &

filename

)

Constructor a loader from the provided file name.

We expand the file-name using wordexp and then open an input file stream to it. We own the stream in this case.

Definition at line 94 of file GeneralCSVLoader.cxx.

    : source_{0}, ownStream_{true} {
  std::string expanded_fname = filename;
  wordexp_t p;
 
  if (wordexp(filename.c_str(), &p, 0)) {
    EXCEPTION_RAISE("StreamCSVFileNotFound",
                    "Error expanding '" + filename + "'");
  }
 
  if (!p.we_wordc) {
    EXCEPTION_RAISE("StreamCSVFileNotFound",
                    "No file matching '" + filename + "' found");
  }
 
  if (p.we_wordc != 1) {
    int nfound = p.we_wordc;
    wordfree(&p);
    EXCEPTION_RAISE("StreamCSVFileNotFound",
                    "Multiple files (" + std::to_string(nfound) +
                        ") matching '" + filename + "' found");
  }
 
  expanded_fname = p.we_wordv[0];
  wordfree(&p);
 
  source_ = new std::ifstream(expanded_fname);
  if (source_->fail()) {
    EXCEPTION_RAISE("StreamCSVFileNotFound",
                    "Unable to open '" + expanded_fname + "'");
  }
}

References source_.

StreamCSVLoader() [2/2]

conditions::StreamCSVLoader::StreamCSVLoader

(

std::istream &

stream

)

Construct a loader from the provided input stream.

We are given an already-created stream, so we do not own the stream in this case.

Definition at line 127 of file GeneralCSVLoader.cxx.

    : source_{&stream}, ownStream_{false} {}

~StreamCSVLoader()

conditions::StreamCSVLoader::~StreamCSVLoader ( )

virtual

Clean-up the stream if we own it.

Definition at line 130 of file GeneralCSVLoader.cxx.

                                  {
  if (ownStream_ && source_) delete source_;
  source_ = 0;
}

References ownStream_, and source_.

Member Function Documentation

getNextLine()

std::string conditions::StreamCSVLoader::getNextLine ( )

protectedvirtual

Get the next line, returning an empty string when there is no further data.

Implements conditions::GeneralCSVLoader.

Definition at line 135 of file GeneralCSVLoader.cxx.

                                       {
  // if no stream, no line...
  if (!source_) return "";
 
  do {
    line_.clear();
    std::getline(*source_, line_);
    if (line_.empty() && source_->eof()) return "";
  } while (line_.empty());  // skip blank lines
 
  return line_;
}

References line_, and source_.

Member Data Documentation

line_

std::string conditions::StreamCSVLoader::line_

private

Line buffer.

Definition at line 122 of file GeneralCSVLoader.h.

Referenced by getNextLine().

ownStream_

bool conditions::StreamCSVLoader::ownStream_

private

Own stream?

Definition at line 118 of file GeneralCSVLoader.h.

Referenced by ~StreamCSVLoader().

source_

std::istream* conditions::StreamCSVLoader::source_

private

The stream.

Definition at line 114 of file GeneralCSVLoader.h.

Referenced by getNextLine(), StreamCSVLoader(), and ~StreamCSVLoader().

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The documentation for this class was generated from the following files:

• Conditions/include/Conditions/GeneralCSVLoader.h
• Conditions/src/Conditions/GeneralCSVLoader.cxx