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#ifndef MOZC_REWRITER_USER_BOUNDARY_HISTORY_REWRITER_H_
#define MOZC_REWRITER_USER_BOUNDARY_HISTORY_REWRITER_H_

#include <vector>
#include <string>

#include "base/port.h"
#include "base/scoped_ptr.h"
#include "rewriter/rewriter_interface.h"

namespace mozc {

class ConversionRequest;
class ConverterInterface;
class Segment;
class Segments;

namespace storage {
class LRUStorage;
}  // namespace storage

class UserBoundaryHistoryRewriter : public RewriterInterface {
 public:
  explicit UserBoundaryHistoryRewriter(
      const ConverterInterface *parent_converter);
  virtual ~UserBoundaryHistoryRewriter();

  virtual bool Rewrite(const ConversionRequest &request,
                       Segments *segments) const;

  virtual void Finish(const ConversionRequest &request, Segments *segments);

  virtual bool Reload();

  virtual void Clear();

 private:
  bool ResizeOrInsert(Segments *segments, const ConversionRequest &request,
                      int type) const;

  const ConverterInterface *parent_converter_;
  scoped_ptr<mozc::storage::LRUStorage> storage_;
};

}  // namespace mozc

#endif  // MOZC_REWRITER_USER_BOUNDARY_HISTORY_REWRITER_H_