inviwo::JSONDataFrameReader Class Reference

#include <jsondataframereader.h>

Inheritance diagram for inviwo::JSONDataFrameReader:

Public Member Functions
	JSONDataFrameReader (const JSONDataFrameReader &)=default
	JSONDataFrameReader (JSONDataFrameReader &&) noexcept=default
JSONDataFrameReader &	operator= (const JSONDataFrameReader &)=default
JSONDataFrameReader &	operator= (JSONDataFrameReader &&) noexcept=default
virtual JSONDataFrameReader *	clone () const override
virtual std::shared_ptr< DataFrame >	readData (const std::filesystem::path &fileName) override
std::shared_ptr< DataFrame >	readData (std::istream &stream) const
Public Member Functions inherited from inviwo::DataReaderType< DataFrame >
DataReaderType &	operator= (const DataReaderType &that)=default
Public Member Functions inherited from inviwo::DataReader
	DataReader (const DataReader &rhs)=default
	DataReader (DataReader &&rhs) noexcept=default
DataReader &	operator= (const DataReader &that)=default
DataReader &	operator= (DataReader &&that) noexcept=default
const std::vector< FileExtension > &	getExtensions () const
void	addExtension (FileExtension ext)
virtual bool	setOption (std::string_view key, std::any value)
	Set reader specific options See the documentation of the specific reader for the available options.
virtual std::any	getOption (std::string_view key)
	Query the value of an reader specific option.
template<typename T>
bool	readsType () const

Additional Inherited Members
Protected Member Functions inherited from inviwo::DataReaderType< DataFrame >
virtual bool	canRead (const std::type_index &index) const override
Static Protected Member Functions inherited from inviwo::DataReader
static void	checkExists (const std::filesystem::path &path)
static std::ifstream	open (const std::filesystem::path &path, std::ios_base::openmode mode=std::ios_base::in)
static std::ifstream	openAndCacheIfUrl (const std::filesystem::path &path, std::ios_base::openmode mode=std::ios_base::in)
static std::filesystem::path	downloadAndCacheIfUrl (const std::filesystem::path &url)
Protected Attributes inherited from inviwo::DataReader
std::vector< FileExtension >	extensions_

Detailed Description

Reads a json file into DataFrame Expects object layout: [ {"Col1": val11, "Col2": val12 }, {"Col1": val21, "Col2": val22 } ] The example above contains two rows and two columns.

Member Function Documentation

clone()

virtual JSONDataFrameReader * inviwo::JSONDataFrameReader::clone ( ) const

overridevirtual

Implements inviwo::DataReaderType< DataFrame >.

readData() [1/2]

virtual std::shared_ptr< DataFrame > inviwo::JSONDataFrameReader::readData ( const std::filesystem::path & fileName )

overridevirtual

read a JSON file from a file Expects object layout: [ {"Col1": val11, "Col2": val12 }, {"Col1": val21, "Col2": val22 } ] The example above contains two rows and two columns.

Parameters

fileName

name of the input file

Returns

a DataFrame containing the JSON data

Exceptions

FileException

if the file cannot be accessed

Implements inviwo::DataReaderType< DataFrame >.

readData() [2/2]

std::shared_ptr< DataFrame > inviwo::JSONDataFrameReader::readData

(

std::istream &

stream

)

const

read DataFrame from a JSON-encoded input stream, e.g. a std::ifstream. In case file streams are used, the file must have be opened prior calling this function. Expects object layout: [ {"Col1": val11, "Col2": val12 }, {"Col1": val21, "Col2": val22 } ] The example above contains two rows and two columns.

Parameters

stream

input stream with the json data

Returns

a DataFrame containing the data

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

• jsondataframereader.h