api - 如何在java api中编写elasticsearch script_score

Question

我在 ElasticSearch 中找到了一个类似的函数

GET /_search
{
  "function_score": {
    "functions": [
      { ...location clause... }, 
      { ...price clause... }, 
      {
        "script_score": {
          "params": { 
            "threshold": 80,
            "discount": 0.1,
            "target": 10
          },
          "script": "price  = doc['price'].value; margin = doc['margin'].value;
          if (price < threshold) { return price * margin / target };
          return price * (1 - discount) * margin / target;" 
        }
      }
    ]
  }
}

• 我使用ScoreFunctionBuilder实现“位置计算”并且“价格计算”，但我不知道怎么写"script_score"和"script"通过java API
• 我的项目中的ES版本是2.2.0，我使用的是java api实现该功能
• 但是我找不到像这样的API ScriptScoreFunctionBuilder. scriptFunction(String script,
Map<String, Object> params)我该怎么办？谢谢:)
  
• 最后我通过使用JD-JUI检查“elasticsearch.jar”文件弄清楚了如何编写它。

例如:

Map<String, Object> params = new HashMap<>();
    params.put("num1", 10);
    params.put("num2", 4);

    String inlineScript = "doc['score'].value * num1 * num2";

    Script script = new Script(script, ScriptType.INLINE, "groovy", params);

    ScriptScoreFunctionBuilder scriptBuilder = ScoreFunctionBuilders.scriptFunction(ss);

仅此而已

Answer 1

这是如何在java中实现scrip_score函数

Map<String, Object> params = new HashMap<>();                   
params.put("paramName1", "paramVal1")
params.put("paramName2", "paramVal2");

String script = "price  = doc['price'].value; margin = doc['margin'].value;
      if (price < threshold) { return price * margin / target };
      return price * (1 - discount) * margin / target;"
XContentBuilder builder = 
                    new ScriptScoreFunctionBuilder()
                    .script(script)
                    .lang("groovy")
                    .params(params)
                    .toXContent(XContentBuilder, params);