text: /*
   * Copyright (c) 2011-2019, The DART development contributors
   * All rights reserved.
   *
   * The list of contributors can be found at:
   *   https://github.com/dartsim/dart/blob/master/LICENSE
   *
   * This file is provided under the following "BSD-style" License:
   *   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.
   *   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 HOLDER 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.
   */
  
  #ifndef DART_COMMON_DETAIL_ASPECT_HPP_
  #define DART_COMMON_DETAIL_ASPECT_HPP_
  
  #include <cassert>
  
  #include "dart/common/Console.hpp"
  #include "dart/common/Aspect.hpp"
  
  namespace dart {
  namespace common {
  
  //==============================================================================
  template <class CompositeType>
  CompositeTrackingAspect<CompositeType>::CompositeTrackingAspect()
    : mComposite(nullptr) // This will be set later when the Composite calls setComposite
  {
    // Do nothing
  }
  
  //==============================================================================
  template <class CompositeType>
  CompositeType* CompositeTrackingAspect<CompositeType>::getComposite()
  {
    return mComposite;
  }
  
  //==============================================================================
  template <class CompositeType>
  const CompositeType* CompositeTrackingAspect<CompositeType>::getComposite() const
  {
    return mComposite;
  }
  
  //==============================================================================
  template <class CompositeType>
  bool CompositeTrackingAspect<CompositeType>::hasComposite() const
  {
    return (nullptr != mComposite);
  }
  
  //==============================================================================
  template <class CompositeType>
  void CompositeTrackingAspect<CompositeType>::setComposite(Composite* newComposite)
  {
    assert(nullptr == mComposite);
  
    mComposite = dynamic_cast<CompositeType*>(newComposite);
    // Note: Derived classes should be responsible for handling the case in which
    // the new composite type does not match the expected type. We should not
    // assume here that it is an error.
  }
  
  //==============================================================================
  template <class CompositeType>
  void CompositeTrackingAspect<CompositeType>::loseComposite(
      Composite* oldComposite)
  {
    DART_UNUSED(oldComposite);
    assert(oldComposite == mComposite);
    mComposite = nullptr;
  }
  
  } // namespace common
  } // namespace dart
  
  #endif // DART_COMMON_DETAIL_ASPECT_HPP_
  