Qore::EncodingConversionOutputStream Class Reference

An OutputStream implementation that performs on-the-fly conversion between two character encodings. More...

#include <QC_EncodingConversionOutputStream.dox.h>

Inheritance diagram for Qore::EncodingConversionOutputStream:

Public Member Methods
nothing	close ()
	Flushes any buffered (unwritten) bytes, closes the output stream and releases all resources. More...
	constructor (Qore::OutputStream os, string sourceEncoding, string destEncoding)
	Creates the EncodingConversionOutputStream based on the OutputStream given. More...
nothing	write (binary data)
	Writes bytes to the output stream. More...
Public Member Methods inherited from Qore::OutputStream
abstract nothing	close ()
	Flushes any buffered (unwritten) bytes, closes the output stream and releases all resources. More...
	constructor ()
	Constructor. More...
abstract nothing	write (binary data)
	Writes bytes to the output stream. More...
Public Member Methods inherited from Qore::StreamBase
	constructor ()
	Throws an exception if called directly; this class can only be instantiated by builtin subclasses. More...
int	getThreadId ()
	Get the currently assigned thread id or -1 if not assigned to any thread.
nothing	reassignThread ()
	Reassigns current thread as thread used for stream manipulation. More...
nothing	unassignThread ()
	Unassigns current thread as thread used for stream manipulation. More...

Detailed Description

An OutputStream implementation that performs on-the-fly conversion between two character encodings.

Example: EncodingConversionOutputStream basic usage

EncodingConversionOutputStream latin2Stream(destUtf8Stream, "ISO-8859-2", "UTF-8");
latin2Stream.write(latin2Data);     #writes UTF-8 equivalents to destUtf8Stream

Note

stream classes are not designed to be accessed from multiple threads; they have been implemented without locking for fast and efficient use when used from a single thread. For methods that would be unsafe to use in another thread, any use of such methods in threads other than the thread where the constructor was called will cause a STREAM-THREAD-ERROR to be thrown, unless the stream is handed off to another thread using the StreamBase::unassignThread() method in the thread that currently owns the stream, and the StreamBase::reassignThread() method in the new thread.

See also

StreamWriter for a class that can be used to write various kinds of data to an OutputStream

Since

Qore 0.8.13

Member Function Documentation

close()

nothing Qore::EncodingConversionOutputStream::close ( )

virtual

Flushes any buffered (unwritten) bytes, closes the output stream and releases all resources.

Any methods called on a closed output stream will throw an exception.

Exceptions

OUTPUT-STREAM-CLOSED-ERROR	the output stream has already been closed
STREAM-THREAD-ERROR	this exception is thrown if this method is called from any thread other than the thread that created the object

Implements Qore::OutputStream.

constructor()

Qore::EncodingConversionOutputStream::constructor	(	Qore::OutputStream	os,
		string	sourceEncoding,
		string	destEncoding
	)

Creates the EncodingConversionOutputStream based on the OutputStream given.

Parameters

os	the destination OutputStream to write bytes to
sourceEncoding	the encoding of the characters that will be written to this stream
destEncoding	the destination character encoding that will be written to the underlying OutputStream os

Exceptions

ENCODING-CONVERSION-ERROR

if either of the encodings is unsupported

write()

nothing Qore::EncodingConversionOutputStream::write ( binary  data )

virtual

Writes bytes to the output stream.

Parameters

data	the data to write

Example:

EncodingConversionOutputStream ecos();
bos.write(<6162>);
bos.write(<63>);

Exceptions

OUTPUT-STREAM-CLOSED-ERROR	the output stream has already been closed
STREAM-THREAD-ERROR	this exception is thrown if this method is called from any thread other than the thread that created the object

Implements Qore::OutputStream.