我想用一个bucket脚本在java中设置aggregationbuilders来计算查询中2个值的比率。

{
  "aggs": {
    "filt": {
      "filters": {
        "filters": {
          "filter_aggs": {
            "bool": {
              "must": [
                {
                  "match": {
                    "code": "A01/B6"
                  }
                }
              ]
            }
          }
        }
      },
      "aggs": {
        "year20": {
          "terms": {
            "field": { "year20_count"}
          }
        },
        "year5": {
          "terms": {
            "field": { "year5_count"}
          }
        },
        "conc_percentage": {
          "bucket_script": {
            "buckets_path": {
              "y20": "year20",
              "y5": "year5"
            },
            "script": "(y5 / y20) * 100"
          }
      }
    }
  }
}

请求是这样设置的，但是如何过滤聚合并将2个同级聚合转换成bucket脚本到java代码呢？