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#ifndef MOZC_DICTIONARY_SUFFIX_DICTIONARY_H_
#define MOZC_DICTIONARY_SUFFIX_DICTIONARY_H_

#include <string>
#include "base/base.h"
#include "dictionary/dictionary_interface.h"

namespace mozc {

// SuffixDictionary is a special dictionary which handles
// Japanese bunsetsu suffixes.
//
// Japanese bunsetsu consists of two parts.
// Content words: ("自立語") and Functional words ("付属語")
// Japanese Bunsets = (Content word){1,1}(Functional words){1,}
//
// Suffix dictionary contains sequences of functional words
// frequently appear on the web.
// When user inputs a content word, we can predict an appropriate
// functional word with this dictionary.
class SuffixDictionary : public DictionaryInterface {
 public:
  SuffixDictionary();
  virtual ~SuffixDictionary();

  // Even if size == 0, suffix dictionary returns all the suffix
  // in this dictionary.
  virtual Node *LookupPredictive(const char *str, int size,
                                 NodeAllocatorInterface *allocator) const;

  // SuffixDictionary doesn't support Prefix/Revese Lookup.
  virtual Node *LookupPrefixWithLimit(
      const char *str, int size,
      const Limit &limit,
      NodeAllocatorInterface *allocator) const;

  virtual Node *LookupReverse(const char *str, int size,
                              NodeAllocatorInterface *allocator) const;

 private:
  DISALLOW_COPY_AND_ASSIGN(SuffixDictionary);
};

class SuffixDictionaryFactory {
 public:
  // return singleton object
  static DictionaryInterface *GetSuffixDictionary();
  static void SetSuffixDictionary(DictionaryInterface *suffix_dictionary);

 private:
  SuffixDictionaryFactory() {}
  ~SuffixDictionaryFactory() {}
};
}  // namespace mozc

#endif  // MOZC_DICTIONARY_SUFFIX_DICTIONARY_H_