无法在弹性搜索相似性实现中覆盖 ClassicSimilarity 中的 scorePayload 函数

Question

我正在尝试在 Elasticsearch 中实现相似性。我想将有效负载与 TF 和 IDF 值一起用于分数计算。当我检查 ClassicSimilarity 文档（https://lucene.apache.org/core/7_4_0/core/org/apache/lucene/search/similarities/ClassicSimilarity.html）时，存在一个可以重载的 scorePayload 函数。当我扩展 ClassicSimilarity class 时，它在 scorePayload 函数上显示错误。我也检查了导入的 class ，并且不存在有效负载功能。我做错了什么？

package org.elasticsearch.index.similarity;

import org.apache.lucene.analysis.payloads.PayloadHelper;
import org.apache.lucene.search.similarities.ClassicSimilarity;
import org.apache.lucene.util.BytesRef;

public class CustomTFIDFScorer extends ClassicSimilarity{

    @Override
    protected float scorePayload(int doc, int start, int end, BytesRef payload) {

        if (payload != null) {
            return PayloadHelper.decodeFloat(payload.bytes, payload.offset);
            } 
        else {
            return 1.0F;
            }
      }

    @Override
      public float tf(float freq) {
        return freq;
      }

    @Override
      public float idf(long docFreq, long docCount) {
        return (float)(Math.log((docCount+1)/(double)(docFreq+1)) + 1.0);
      }

    @Override
    public float lengthNorm(int length) {
        // TODO Auto-generated method stub
        return 1;
    }
}

这是我的 maven 文件：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>CustomPayloadSimilarity</groupId>
  <artifactId>ElasticseachCustomSimilarity</artifactId>
  <version>0.0.1</version>

  <dependencies>  
  <!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch -->
<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>7.4.0</version>
</dependency>
</dependencies>

</project>

Answer 1

弹性 7.4 uses Lucene 8.2 where method you are trying to override 不存在

无法在弹性搜索相似性实现中覆盖 ClassicSimilarity 中的 scorePayload 函数

not able to override scorePayload function in ClassicSimilarity in elasticsearch similarity implementation

java

lucene

maven

elasticsearch

elasticsearch-plugin