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<<