text: // Copyright (C) 2019-2020 Zilliz. 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.
  
  #pragma once
  
  #include "BooleanQuery.h"
  #include "MilvusApi.h"
  #include "thirdparty/nlohmann/json.hpp"
  
  #include <memory>
  #include <string>
  #include <utility>
  #include <vector>
  
  using JSON = nlohmann::json;
  
  namespace milvus_sdk {
  
  class Utils {
   public:
      static std::string
      CurrentTime();
  
      static std::string
      CurrentTmDate(int64_t offset_day = 0);
  
      static const std::string&
      GenCollectionName();
  
      static void
      Sleep(int seconds);
  
      static std::string
      MetricTypeName(const milvus::MetricType& metric_type);
  
      static std::string
      IndexTypeName(const milvus::IndexType& index_type);
  
      static void
      PrintCollectionParam(const milvus::CollectionParam& collection_param);
  
      static void
      PrintPartitionParam(const milvus::PartitionParam& partition_param);
  
      static void
      PrintIndexParam(const milvus::IndexParam& index_param);
  
      static void
      BuildEntities(int64_t from, int64_t to, std::vector<milvus::Entity>& entity_array, std::vector<int64_t>& entity_ids,
                    int64_t dimension);
  
      static void
      PrintSearchResult(const std::vector<std::pair<int64_t, milvus::Entity>>& entity_array,
                        const milvus::TopKQueryResult& topk_query_result);
  
      static void
      CheckSearchResult(const std::vector<std::pair<int64_t, milvus::Entity>>& entity_array,
                        const milvus::TopKQueryResult& topk_query_result);
  
      static void
      DoSearch(std::shared_ptr<milvus::Connection> conn, const std::string& collection_name,
               const std::vector<std::string>& partition_tags, int64_t top_k, int64_t nprobe,
               const std::vector<std::pair<int64_t, milvus::Entity>>& entity_array,
               milvus::TopKQueryResult& topk_query_result);
  
      static void
      ConstructVector(uint64_t nq, uint64_t dimension, std::vector<milvus::Entity>& query_vector);
  
      static std::vector<milvus::LeafQueryPtr>
      GenLeafQuery();
  
      static void
      GenDSLJson(nlohmann::json& dsl_json, nlohmann::json& vector_param_json);
  
      static void
      PrintTopKHybridQueryResult(milvus::TopKHybridQueryResult& topk_query_result);
  };
  
  }  // namespace milvus_sdk