BUSBOY::DatasetContext Class Reference

#include <DatasetContext.h>

Inheritance diagram for BUSBOY::DatasetContext:

Public Member Functions
	DatasetContext ()
virtual DataFile *	findDataFile (const DataKey &key) const
	Tries to find a file corresponding to the given key. More...
virtual bool	isOutput () const
	default is false More...
virtual bool	isQueryOnly () const
	Indicates that no file keys are pushed into the dataset Default is false. More...
virtual void	addDataFile (const DataKey &key, DataFile *file)
	Create a new output file for writing. More...
virtual std::string	getDataFileName (const DataKey &key) const
	Tries to get the name of the data file. More...
virtual RandomAccessFile *	readFileAsRandomAccess (const DataKey &key) const
	Access input file as a read-only random access file Default is to throw exception. More...
virtual WritableRandomAccessFile *	writeFileAsRandomAccess (const DataKey &key) const
	Access output file as a writable random access file Default is to throw exception. More...

Constructor & Destructor Documentation

BUSBOY::DatasetContext::DatasetContext

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Member Function Documentation

void BUSBOY::DatasetContext::addDataFile ( const DataKey &  key, DataFile *  file  )

virtual

Create a new output file for writing.

Default is to throw exception

Reimplemented in BUSBOY::ExternalDatasetContext.

DataFile * BUSBOY::DatasetContext::findDataFile ( const DataKey &  key ) const

virtual

Tries to find a file corresponding to the given key.

Default behavior is no file found.

Returns

null if there is no file with this key

Reimplemented in BUSBOY::ExternalDatasetContext.

std::string BUSBOY::DatasetContext::getDataFileName ( const DataKey &  key ) const

virtual

Tries to get the name of the data file.

Default is name not available.

Returns

empty string if the name is not available

Reimplemented in BUSBOY::ExternalDatasetContext.

bool BUSBOY::DatasetContext::isOutput ( ) const

virtual

default is false

Reimplemented in BUSBOY::ExternalDatasetContext.

bool BUSBOY::DatasetContext::isQueryOnly ( ) const

virtual

Indicates that no file keys are pushed into the dataset Default is false.

Reimplemented in BUSBOY::ExternalDatasetContext.

RandomAccessFile * BUSBOY::DatasetContext::readFileAsRandomAccess ( const DataKey &  key ) const

virtual

Access input file as a read-only random access file Default is to throw exception.

Reimplemented in BUSBOY::ExternalDatasetContext.

WritableRandomAccessFile * BUSBOY::DatasetContext::writeFileAsRandomAccess ( const DataKey &  key ) const

virtual

Access output file as a writable random access file Default is to throw exception.

Reimplemented in BUSBOY::ExternalDatasetContext.

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

• src/cpp/api/dataset/DatasetContext.h
• src/cpp/impl/dataset/DatasetContext.cpp