FileLocationHandler::AbstractFileLocationHandler Class Reference

The abstract file location handler class. More...

#include <FileLocationHandler.qc.dox.h>

Inheritance diagram for FileLocationHandler::AbstractFileLocationHandler:

Public Member Methods
binary	getBinaryFile (string scheme, string location, *hash< auto > opts)
	Retrieves a binary file from the given location.
Qore::InputStream	getBinaryStream (string scheme, string location, *hash< auto > opts)
	Retrieves a binary file from the given location.
Qore::AbstractPollOperation	getIoPollerForLocation (string scheme, string location, *hash< auto > opts)
	Retrieves an I/O poller to retrieve a binary file from the given location.
OutputStreamWrapper	getOutputStream (string scheme, string location, *hash< auto > opts)
	Returns an output stream for writing data to the given location.
hash< string, hash< FileHandlerOptionInfo > >	getReadOptions ()
	Gets supported read options.
Qore::StreamReader	getStreamReader (string scheme, string location, *hash< auto > opts)
	Returns a string stream for the file's data at the given location.
string	getTextFile (string scheme, string location, *hash< auto > opts)
	Retrieves a text file from the given location.
hash< string, hash< FileHandlerOptionInfo > >	getWriteOptions ()
	Gets supported write options.
	writeFile (string scheme, string location, data contents, *hash< auto > opts)
	Writes data to a file at the given location.

Private Member Methods
abstract binary	getBinaryFileImpl (string scheme, string location, *hash< auto > opts)
	Retrieves a binary file from the given location.
abstract Qore::InputStream	getBinaryStreamImpl (string scheme, string location, *hash< auto > opts)
	Retrieves a binary file from the given location.
abstract Qore::AbstractPollOperation	getIoPollerForLocationImpl (string scheme, string location, *hash< auto > opts)
	Retrieves an I/O poller to retrieve a binary file from the given location.
abstract OutputStreamWrapper	getOutputStreamImpl (string scheme, string location, *hash< auto > opts)
	Returns an output stream for writing data to the given location.
abstract hash< string, hash< FileHandlerOptionInfo > >	getReadOptionsImpl ()
	Gets supported read options.
abstract Qore::StreamReader	getStreamReaderImpl (string scheme, string location, *hash< auto > opts)
	Returns a string stream for the file's data at the given location.
abstract string	getTextFileImpl (string scheme, string location, *hash< auto > opts)
	Retrieves a text file from the given location.
abstract hash< string, hash< FileHandlerOptionInfo > >	getWriteOptionsImpl ()
	Gets supported write options.
abstract	writeFileImpl (string scheme, string location, data contents, *hash< auto > opts)
	Writes data to a file at the given location.

Static Private Member Methods
static string	forceEncoding (string str, *string encoding)
	Returns a string tagged with the given encoding, if any.

Detailed Description

The abstract file location handler class.

Member Function Documentation

getBinaryFile()

binary FileLocationHandler::AbstractFileLocationHandler::getBinaryFile	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Retrieves a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

the binary data of the file's contents, if it can be retrieved

getBinaryFileImpl()

abstract binary FileLocationHandler::AbstractFileLocationHandler::getBinaryFileImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Retrieves a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

the binary data of the file's contents, if it can be retrieved

getBinaryStream()

Qore::InputStream FileLocationHandler::AbstractFileLocationHandler::getBinaryStream	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Retrieves a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

an input stream of the file's contents, if it can be retrieved

Note

The data is read in the background and added to the input stream

getBinaryStreamImpl()

abstract Qore::InputStream FileLocationHandler::AbstractFileLocationHandler::getBinaryStreamImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Retrieves a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

an input stream of the file's contents, if it can be retrieved

getIoPollerForLocation()

Qore::AbstractPollOperation FileLocationHandler::AbstractFileLocationHandler::getIoPollerForLocation	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Retrieves an I/O poller to retrieve a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

an I/O poller to retrieve the file's data

getIoPollerForLocationImpl()

abstract Qore::AbstractPollOperation FileLocationHandler::AbstractFileLocationHandler::getIoPollerForLocationImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Retrieves an I/O poller to retrieve a binary file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

an I/O poller to retrieve the file's data

getOutputStream()

OutputStreamWrapper FileLocationHandler::AbstractFileLocationHandler::getOutputStream	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Returns an output stream for writing data to the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	write options

Returns

an output stream for writing to the file

Note

• OutputStreamWrapper::close() must be called to close the stream after writing terminates in order to avoid a deadlock
• The data written to the OutputStreamWrapper object may be written in the background; to ensure that the data has been written to the target, call OutputStreamWrapper::waitForIo()

getOutputStreamImpl()

abstract OutputStreamWrapper FileLocationHandler::AbstractFileLocationHandler::getOutputStreamImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Returns an output stream for writing data to the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	write options

Returns

an output stream for writing to the file

Note

• OutputStreamWrapper::close() must be called to close the stream after writing terminates in order to avoid a deadlock
• The data written to the OutputStreamWrapper object may be written in the background; to ensure that the data has been written to the target, call OutputStreamWrapper::waitForIo()

getReadOptions()

hash< string, hash< FileHandlerOptionInfo > > FileLocationHandler::AbstractFileLocationHandler::getReadOptions

(

)

Gets supported read options.

Returns

supported read options

getReadOptionsImpl()

abstract hash< string, hash< FileHandlerOptionInfo > > FileLocationHandler::AbstractFileLocationHandler::getReadOptionsImpl ( )

private

Gets supported read options.

Returns

supported read options

getStreamReader()

Qore::StreamReader FileLocationHandler::AbstractFileLocationHandler::getStreamReader	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Returns a string stream for the file's data at the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

a stream reader for the file's contents, if it can be retrieved

Note

The data is read in the background and added to the input stream backing the stream reader

getStreamReaderImpl()

abstract Qore::StreamReader FileLocationHandler::AbstractFileLocationHandler::getStreamReaderImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Returns a string stream for the file's data at the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

a stream reader for the file's contents, if it can be retrieved

getTextFile()

string FileLocationHandler::AbstractFileLocationHandler::getTextFile	(	string	scheme,
		string	location,
		*hash< auto >	opts
	)

Retrieves a text file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme or options
opts	read options

Returns

the string of the file's contents, if it can be retrieved

getTextFileImpl()

abstract string FileLocationHandler::AbstractFileLocationHandler::getTextFileImpl ( string  scheme, string  location, *hash< auto >  opts  )

private

Retrieves a text file from the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
opts	read options

Returns

the string of the file's contents, if it can be retrieved

getWriteOptions()

hash< string, hash< FileHandlerOptionInfo > > FileLocationHandler::AbstractFileLocationHandler::getWriteOptions

(

)

Gets supported write options.

Returns

supported write options

getWriteOptionsImpl()

abstract hash< string, hash< FileHandlerOptionInfo > > FileLocationHandler::AbstractFileLocationHandler::getWriteOptionsImpl ( )

private

Gets supported write options.

Returns

supported write options

writeFile()

FileLocationHandler::AbstractFileLocationHandler::writeFile	(	string	scheme,
		string	location,
		data	contents,
		*hash< auto >	opts
	)

Writes data to a file at the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
contents	the file's contents
opts	write options

writeFileImpl()

abstract FileLocationHandler::AbstractFileLocationHandler::writeFileImpl ( string  scheme, string  location, data  contents, *hash< auto >  opts  )

private

Writes data to a file at the given location.

Parameters

scheme	the scheme being used
location	the location string without the scheme
contents	the file's contents
opts	write options