code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.skywalking.library.elasticsearch.response.search;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.Map;
  import lombok.Getter;
  import lombok.Setter;
  
  @Getter
  @Setter
  public final class SearchHit implements Iterable<Map.Entry<String, Object>> {
      @JsonProperty("_index")
      private String index;
      @JsonProperty("_type")
      private String type;
      @JsonProperty("_id")
      private String id;
      @JsonProperty("_score")
      private double score;
      @JsonProperty("_source")
      private Map<String, Object> source;
  
      @Override
      public Iterator<Map.Entry<String, Object>> iterator() {
          if (source == null) {
              return Collections.emptyIterator();
          }
          return source.entrySet().iterator();
      }
  }
  