meta_object.hpp

Go to the documentation of this file.

/*
 * 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 Poco::MetaObject
// that allows us to tag MetaObjects with an associated library name.
 
#ifndef CLASS_LOADER__META_OBJECT_HPP_
#define CLASS_LOADER__META_OBJECT_HPP_
 
#include <console_bridge/console.h>
#include "class_loader/visibility_control.hpp"
 
#include <typeinfo>
#include <string>
#include <vector>
 
namespace class_loader
{
 
class ClassLoader;  // Forward declaration
 
namespace impl
{
 
typedef std::vector<class_loader::ClassLoader *> ClassLoaderVector;
 
class CLASS_LOADER_PUBLIC AbstractMetaObjectBase
{
public:
  AbstractMetaObjectBase(const std::string & class_name, const std::string & base_class_name);
  ~AbstractMetaObjectBase();
 
  std::string className() const;
 
  std::string baseClassName() const;
  std::string typeidBaseClassName() const;
 
  std::string getAssociatedLibraryPath();
 
  void setAssociatedLibraryPath(std::string library_path);
 
  void addOwningClassLoader(ClassLoader * loader);
 
  void removeOwningClassLoader(const ClassLoader * loader);
 
  bool isOwnedBy(const ClassLoader * loader);
 
  bool isOwnedByAnybody();
 
  ClassLoaderVector getAssociatedClassLoaders();
 
protected:
  virtual void dummyMethod() {}
 
protected:
  ClassLoaderVector associated_class_loaders_;
  std::string associated_library_path_;
  std::string base_class_name_;
  std::string class_name_;
  std::string typeid_base_class_name_;
};
 
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)
  {
    AbstractMetaObjectBase::typeid_base_class_name_ = std::string(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_