ndn::security::transform::Transform Class Reference

Abstraction of an intermediate transformation module. More...

#include <ndn-cxx/security/transform/transform-base.hpp>

Inheritance diagram for ndn::security::transform::Transform:

Collaboration diagram for ndn::security::transform::Transform:

Public Member Functions
void	end ()
	Close the input interface of a module. More...
size_t	getIndex () const
	Get the module index. More...
bool	isEnd () const
	Check if the input interface of a module is closed. More...
void	setIndex (size_t index)
	Set the module index. More...
size_t	write (span< const uint8_t > buf)
	Accept input data and perform transformation. More...

Protected Types
using	OBuffer = std::vector< uint8_t >

Protected Member Functions
	Transform ()=default
void	appendChain (unique_ptr< Downstream > tail)
	Connect to the next transformation module. More...
void	flushAllOutput ()
	Read the all the content from output buffer and write it into next module. More...
void	flushOutputBuffer ()
	Read the content from output buffer and write it into next module. More...
Downstream *	getNext ()
bool	isOutputBufferEmpty () const
	Check if output buffer is empty. More...
void	setOutputBuffer (unique_ptr< OBuffer > buffer)
	Set output buffer to buffer. More...

Protected Attributes
unique_ptr< Downstream >	m_next

Detailed Description

Abstraction of an intermediate transformation module.

Definition at line 178 of file transform-base.hpp.

Member Typedef Documentation

OBuffer

using ndn::security::transform::Transform::OBuffer = std::vector<uint8_t>

protected

Definition at line 182 of file transform-base.hpp.

Constructor & Destructor Documentation

Transform()

ndn::security::transform::Transform::Transform ( )

protecteddefault

Member Function Documentation

appendChain()

void ndn::security::transform::Upstream::appendChain ( unique_ptr< Downstream >  tail )

protectedinherited

Connect to the next transformation module.

Definition at line 54 of file transform-base.cpp.

end()

void ndn::security::transform::Downstream::end ( )

inherited

Close the input interface of a module.

This method will notify this module that there is no more input and that the module should finalize transformation.

Although end() can be invoked multiple times, only the first invocation takes effect.

Definition at line 44 of file transform-base.cpp.

flushAllOutput()

void ndn::security::transform::Transform::flushAllOutput ( )

protected

Read the all the content from output buffer and write it into next module.

Postcondition

isOutputBufferEmpty() returns true.

Definition at line 76 of file transform-base.cpp.

flushOutputBuffer()

void ndn::security::transform::Transform::flushOutputBuffer ( )

protected

Read the content from output buffer and write it into next module.

It is not guaranteed that all the content in output buffer will be flushed to next module.

Definition at line 66 of file transform-base.cpp.

getIndex()

size_t ndn::security::transform::Downstream::getIndex ( ) const

inlineinherited

Get the module index.

Definition at line 125 of file transform-base.hpp.

getNext()

Downstream* ndn::security::transform::Upstream::getNext ( )

inlineprotectedinherited

Definition at line 166 of file transform-base.hpp.

isEnd()

bool ndn::security::transform::Downstream::isEnd ( ) const

inlineinherited

Check if the input interface of a module is closed.

Definition at line 107 of file transform-base.hpp.

isOutputBufferEmpty()

bool ndn::security::transform::Transform::isOutputBufferEmpty ( ) const

protected

Check if output buffer is empty.

Definition at line 92 of file transform-base.cpp.

setIndex()

void ndn::security::transform::Downstream::setIndex ( size_t  index )

inlineinherited

Set the module index.

Definition at line 116 of file transform-base.hpp.

setOutputBuffer()

void ndn::security::transform::Transform::setOutputBuffer ( unique_ptr< OBuffer >  buffer )

protected

Set output buffer to buffer.

Definition at line 84 of file transform-base.cpp.

write()

size_t ndn::security::transform::Downstream::write ( span< const uint8_t >  buf )

inherited

Accept input data and perform transformation.

An upstream module should call this method to write data into this module. The written data will be transformed and the result will be written into the next downstream module.

An upstream module can keep calling this method to until end() is called, which indicates the end of input. After that, calling this method will cause Error.

If a Downstream implementation expects structured input (e.g., hex decoding requires byte-pair), it should not return less than size if final portion of input is not a complete record.

Returns

Number of bytes that have been written into this module.

Exceptions

Error

if this module is closed or transformation error happens.

Definition at line 33 of file transform-base.cpp.

Member Data Documentation

m_next

unique_ptr<Downstream> ndn::security::transform::Upstream::m_next

protectedinherited

Definition at line 172 of file transform-base.hpp.