ers::Stream Class Reference

Root/Null issue stream. More...

#include <Stream.h>

Inheritance diagram for ers::Stream:

Public Member Functions
	Stream ()
	Stream (const Stream &other)
	operator std::string () const
virtual	~Stream ()
virtual void	send (const Issue *i)
	Sends an issue into the stream.
virtual Issue *	receive ()
	Receives an issue from the stream.
virtual void	print_to (std::ostream &stream) const

Static Public Attributes
static const char *const	NULL_STREAM_KEY = "null"

Friends
class	Issue

Detailed Description

Root/Null issue stream.

Root issue stream. An ERS stream is a mean to send and receive issues. The two core method to do so are send and receive. Certain subclasses of stream might implement only sending, or only receiving. The root stream class implements a null stream, i.e a stream where no issue can be read from and silently discards sent issues.

Author

Matthias Wiesmann

Version

1.0

Definition at line 35 of file Stream.h.

Constructor & Destructor Documentation

Stream() [1/2]

ers::Stream::Stream

(

)

Definition at line 31 of file Stream.cxx.

{}

Stream() [2/2]

ers::Stream::Stream

(

const Stream &

other

)

Definition at line 32 of file Stream.cxx.

{} 

~Stream()

ers::Stream::~Stream ( )

virtual

Definition at line 33 of file Stream.cxx.

{}

Member Function Documentation

operator std::string()

ers::Stream::operator std::string

(

)

const

Definition at line 35 of file Stream.cxx.

                                    {
    std::ostringstream stream ; 
    print_to(stream); 
    return stream.str(); 
} // to string 

print_to()

void ers::Stream::print_to ( std::ostream &  stream ) const

virtual

Reimplemented in ers::FIFOStream, ers::FilterStream, and ers::HumanStream.

Definition at line 59 of file Stream.cxx.

                                                 {
    stream << NULL_STREAM_KEY << ':' ; 
} // print_to

receive()

ers::Issue * ers::Stream::receive ( )

virtual

Receives an issue from the stream.

Reads an isssue on the stream

Returns

the issue that has been read

Note

This implementation always returns a null pointer

Reimplemented in ers::FIFOStream.

Definition at line 55 of file Stream.cxx.

                             {
    return 0 ; 
} // receive

send()

void ers::Stream::send ( const Issue *  i )

virtual

Sends an issue into the stream.

Sends the issue to the stream.

Parameters

i	the issue to send

Note

This implementation silently discards the Issue

Reimplemented in ers::FIFOStream, ers::FilterStream, ers::DefaultStream, and ers::HumanStream.

Definition at line 46 of file Stream.cxx.

                                   {
    (void) i ; 
} // send 

Referenced by ers::StreamFactory::dispatch().

Friends And Related Function Documentation

Issue

friend class Issue

friend

Definition at line 36 of file Stream.h.

Member Data Documentation

NULL_STREAM_KEY

const char *const ers::Stream::NULL_STREAM_KEY = "null"

static

Key for discard stream

Definition at line 39 of file Stream.h.

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

• Stream.h
• Stream.cxx