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.opensearch.vectorstore;
  
  import lombok.Data;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  
  @Data
  public class KnowledgeDO {
  
      private Long id;
  
      private String namespace;
  
      private String contentId;
  
      private Integer type;
  
      private String content;
  
      private Integer idx;
  
      private String rowContent;
  
      private Double distance;
  
      private String metadata;
  
      Map<String, String> toMap() {
          Map<String, String> map = new HashMap<>();
          map.put("id", Optional.ofNullable(id).map(String::valueOf).orElse(null));
          map.put("namespace", namespace);
          map.put("content_id", Optional.ofNullable(contentId).map(String::valueOf).orElse(null));
          map.put("type", Optional.ofNullable(type).map(String::valueOf).orElse(null));
          map.put("content", content);
          map.put("idx", Optional.ofNullable(idx).map(String::valueOf).orElse(null));
          map.put("row_content", rowContent);
          map.put("distance", Optional.ofNullable(distance).map(String::valueOf).orElse(null));
          map.put("metadata", metadata);
          return map;
      }
  
  }