text: /*
   * Copyright (C) 2018 Open Source Robotics Foundation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
  */
  #ifndef IGNITION_GAZEBO_NULL_SYSTEM_HH_
  #define IGNITION_GAZEBO_NULL_SYSTEM_HH_
  
  #include <memory>
  
  #include <ignition/gazebo/config.hh>
  #include <ignition/gazebo/Export.hh>
  #include <ignition/gazebo/System.hh>
  
  namespace ignition
  {
  namespace gazebo
  {
  // Inline bracket to help doxygen filtering.
  inline namespace IGNITION_GAZEBO_VERSION_NAMESPACE {
  namespace systems
  {
    /// \class Null Null.hh ignition/gazebo/systems/Null.hh
    /// \brief Minimal system implementation
    class IGNITION_GAZEBO_VISIBLE Null:
      public System,
      public ISystemConfigure,
      public ISystemPreUpdate,
      public ISystemUpdate,
      public ISystemPostUpdate
    {
      /// \brief Constructor
      public: Null();
  
      /// \brief Destructor
      public: ~Null() override;
  
      /// Documentation inherited
      public: void Configure(const Entity &_entity,
                             const std::shared_ptr<const sdf::Element> &_sdf,
                             EntityComponentManager &_ecm,
                             EventManager &_eventMgr) override;
  
      /// Documentation inherited
      public: void PreUpdate(const UpdateInfo &_info,
                             EntityComponentManager &_ecm) override;
  
      /// Documentation inherited
      public: void Update(const UpdateInfo &_info,
                          EntityComponentManager &_ecm) override;
  
      /// Documentation inherited
      public: void PostUpdate(const UpdateInfo &_info,
                              const EntityComponentManager &_ecm) override;
    };
    }
  }
  }
  }
  #endif
  
  
  