Stream.cxx

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/*
 *  Stream.cxx
 *  ers
 *
 *  Created by Matthias Wiesmann on 01.12.04.
 *  Copyright 2004 CERN. All rights reserved.
 *
 */
 
#include <iostream>
#include <sstream>
 
#include "ers/Issue.h"
#include "ers/StreamFactory.h"
 
const char* const ers::Stream::NULL_STREAM_KEY = "null" ; 
 
namespace {
    ers::Stream *create_stream(const std::string &protocol, const std::string &uri) { 
        (void) uri ; 
    if (protocol==ers::Stream::NULL_STREAM_KEY) return new ers::Stream() ; 
    return 0 ;
    } 
    bool registered = ers::StreamFactory::instance()->register_factory(ers::Stream::NULL_STREAM_KEY,create_stream) ;
} // anonymous namespace 
 
// --------------
// Member methods 
// --------------
 
ers::Stream::Stream() {}
ers::Stream::Stream(const Stream &) {} 
ers::Stream::~Stream() {}
 
ers::Stream::operator std::string() const {
    std::ostringstream stream ; 
    print_to(stream); 
    return stream.str(); 
} // to string 
 
/** Sends the issue to the stream.
  * \param i the issue to send 
  * \note This implementation silently discards the Issue
  */
 
void ers::Stream::send(const Issue *i) {
    (void) i ; 
} // send 
 
/** Reads an isssue on the stream
  * \return the issue that has been read
  * \note This implementation always returns a null pointer
  */
 
ers::Issue *ers::Stream::receive() {
    return 0 ; 
} // receive
 
void ers::Stream::print_to(std::ostream& stream) const {
    stream << NULL_STREAM_KEY << ':' ; 
} // print_to
 
std::ostream& ers::operator<<(std::ostream& target, const ers::Stream & s) {
    s.print_to(target); 
    return target ; 
} // operator<<