//
// Copyright RIME Developers
// Distributed under the BSD License
//
// 2011-12-11 GONG Chen <chen.sst@gmail.com>
//

#ifndef RIME_FILTER_H_
#define RIME_FILTER_H_

#include <rime/candidate.h>
#include <rime/common.h>
#include <rime/component.h>
#include <rime/ticket.h>

namespace rime {

class Engine;
struct Segment;
class Translation;

class Filter : public Class<Filter, const Ticket&> {
 public:
  explicit Filter(const Ticket& ticket)
      : engine_(ticket.engine), name_space_(ticket.name_space) {}
  virtual ~Filter() = default;

  virtual an<Translation> Apply(an<Translation> translation,
                                        CandidateList* candidates) = 0;

  virtual bool AppliesToSegment(Segment* segment) {
    return true;
  }
 
  string name_space() const { return name_space_; }
 
 protected:
  Engine* engine_;
  string name_space_;
};

}  // namespace rime

#endif  // RIME_FILTER_H_
