text: // Copyright (c) 2018 Baidu, Inc. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef BAIDU_NLP_ANYQ_COSINE_SIM_H
  #define BAIDU_NLP_ANYQ_COSINE_SIM_H
  
  #include "matching/matching_interface.h"
  
  namespace anyq {
  //该特征表示query与候选在字面上的余弦相似度
  class CosineSimilarity : public MatchingInterface {
  public:
      CosineSimilarity();
      virtual ~CosineSimilarity() override;
      virtual int init(DualDictWrapper* dict, const MatchingConfig& matching_config) override;
      virtual int destroy() override;
      virtual int compute_similarity(const AnalysisResult& analysis_res,
              RankResult& candidates) override;
  private:
      DISALLOW_COPY_AND_ASSIGN(CosineSimilarity);
  };
  
  } // namespace anyq
  
  #endif  // BAIDU_NLP_ANYQ_COSINE_SIMILARITY_H
  