component.h

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//
// Copyright RIME Developers
// Distributed under the BSD License
//
// 2011-03-14 GONG Chen <chen.sst@gmail.com>
//
#ifndef RIME_COMPONENT_H_
#define RIME_COMPONENT_H_
 
#include <rime/registry.h>
 
namespace rime {
 
class ComponentBase {
 public:
  ComponentBase() = default;
  virtual ~ComponentBase() = default;
};
 
template <class T, class Arg>
struct Class {
  using Initializer = Arg;
 
  class Component : virtual public ComponentBase {
   public:
    virtual T* Create(Initializer arg) = 0;
  };
 
  static Component* Require(const string& name) {
    return dynamic_cast<Component*>(Registry::instance().Find(name));
  }
};
 
template <class T>
struct Component : public T::Component {
 public:
  T* Create(typename T::Initializer arg) { return new T(arg); }
};
 
}  // namespace rime
 
#endif  // RIME_COMPONENT_H_