content: /**
   * Copyright (C) 2024 AIDC-AI
   *
   * 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.
   */
  package com.alibaba.langengine.core.chain.retrievalqa;
  
  import com.alibaba.langengine.core.indexes.BaseRetriever;
  import com.alibaba.langengine.core.indexes.Document;
  import lombok.Data;
  
  import java.util.List;
  
  import static com.alibaba.langengine.core.config.LangEngineConfiguration.RETRIEVAL_QA_RECOMMEND_COUNT;
  
  /**
   * 默认检索器
   *
   * @author xiaoxuan.lp
   */
  @Data
  public class RetrievalQA extends BaseRetrievalQA {
  
      /**
       * TopN 知识库推荐数量
       */
      private int recommend = Integer.valueOf(RETRIEVAL_QA_RECOMMEND_COUNT);
  
      /**
       * 设置最大距离值
       * 参考：https://help.aliyun.com/apsara/enterprise/v_3_16_2_20220708/hologram/enterprise-ascm-user-guide/vector-prolima.html
       */
      private Double maxDistanceValue;
  
      private BaseRetriever retriever;
  
      public List<Document> getDocs(String question) {
          return retriever.getRelevantDocuments(question, recommend, maxDistanceValue);
      }
  }
  