registry.cpp

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/*
 * Copyright (c) 2011, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "rve_common/registry.h"

namespace rve_common
{

bool Registry::add( UUID uuid, RegistrantWPtr registrant )
{
  MapType::iterator iter = id_to_registrant_map_.find( uuid );
  if( iter != id_to_registrant_map_.end() ) {
    RegistrantPtr existing_entry = (*iter).second.lock();
    if( existing_entry )
    {
      return false;
    }
  }
  id_to_registrant_map_[ uuid ] = registrant;
  return true;
}

bool Registry::remove( UUID uuid, RegistrantWPtr registrant )
{
  MapType::iterator iter = id_to_registrant_map_.find( uuid );
  if( iter != id_to_registrant_map_.end() ) {
    id_to_registrant_map_.erase( iter );
    return true;
  }

  return false;
}

RegistrantPtr Registry::get( UUID uuid )
{
  RegistrantPtr result;
  MapType::iterator iter = id_to_registrant_map_.find( uuid );
  if( iter != id_to_registrant_map_.end() )
  {
    result = (*iter).second.lock();
  }
  
  return result;
}

} // end namespace rve_common