Program Listing for File meta_object.hpp

↰ Return to documentation for file (include/class_loader/meta_object.hpp)

/*
 * Software License Agreement (BSD License)
 *
 * Copyright (c) 2012, 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 copyright holders 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.
 */

// Note: This header defines a simplication of a shared library

#ifndef CLASS_LOADER__META_OBJECT_HPP_
#define CLASS_LOADER__META_OBJECT_HPP_

#include <string>
#include <typeinfo>
#include <vector>

#include "class_loader/visibility_control.hpp"

namespace class_loader
{

class ClassLoader;  // Forward declaration

namespace impl
{

class AbstractMetaObjectBaseImpl;

class CLASS_LOADER_PUBLIC AbstractMetaObjectBase
{
public:
  AbstractMetaObjectBase(
    const std::string & class_name,
    const std::string & base_class_name,
    const std::string & typeid_base_class_name = "UNSET");
  ~AbstractMetaObjectBase();

  const std::string & className() const;

  const std::string & baseClassName() const;
  const std::string & typeidBaseClassName() const;

  const std::string & getAssociatedLibraryPath() const;

  void setAssociatedLibraryPath(const std::string & library_path);

  void addOwningClassLoader(ClassLoader * loader);

  void removeOwningClassLoader(const ClassLoader * loader);

  bool isOwnedBy(const ClassLoader * loader) const;

  bool isOwnedByAnybody() const;

  size_t getAssociatedClassLoadersCount() const;

  ClassLoader * getAssociatedClassLoader(size_t index) const;

protected:
  virtual void dummyMethod() {}

  AbstractMetaObjectBaseImpl * impl_;
};

template<class B>
class AbstractMetaObject : public AbstractMetaObjectBase
{
public:
  AbstractMetaObject(const std::string & class_name, const std::string & base_class_name)
  : AbstractMetaObjectBase(class_name, base_class_name, typeid(B).name())
  {
  }

  virtual B * create() const = 0;

private:
  AbstractMetaObject();
  AbstractMetaObject(const AbstractMetaObject &);
  AbstractMetaObject & operator=(const AbstractMetaObject &);
};

template<class C, class B>
class MetaObject : public AbstractMetaObject<B>
{
public:
  MetaObject(const std::string & class_name, const std::string & base_class_name)
  : AbstractMetaObject<B>(class_name, base_class_name)
  {
  }

  B * create() const
  {
    return new C;
  }
};

}  // namespace impl
}  // namespace class_loader

#endif  // CLASS_LOADER__META_OBJECT_HPP_