meta_object.hpp

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

#include "class_loader/console_bridge_compatibility.hpp"

namespace class_loader
{

class ClassLoader;  // Forward declaration

namespace class_loader_private
{

typedef std::vector<class_loader::ClassLoader *> ClassLoaderVector;

class 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 class_loader_private
}  // namespace class_loader

#endif  // CLASS_LOADER__META_OBJECT_HPP_