Scala 值withFilter不是java.util.list的成员

//这里我想返回一个攻击列表，但它显示了上面的错误

case class AggResult(bucketKey: String, bucketCount: Long, bucketValue: Double)

请注意，JavaConversions（在注释中链接）已被弃用

使用

导入scala.collection.JavaConverters_
为了{
bucket for comprehension转换为flatMap/map和withFilter，然后您只能使用monaidic类型，只需将java.util.List转换为scala.collections.immutable.Listfor（线程“main”中的bucket异常）java.lang.ClassCastException:java.util.Collections$UnmodifiableRandomAccessList不能强制转换为BigginSight$处的scala.collection.immutable.List。ExtractAdvanceUlts（BigginSight.scala:105）位于BigginSight$.delayedEndpoint$BigginSight$delayedInit$body.apply（BigginSight.scala:10）在scala.Function0.apply$mcV$sp（Function0.scala:34）在scala.Function0.apply$mcV$sp$（Function0.scala:34）您不能将其强制转换到scala列表中，因为它是java.util列表…请查看此java转换API：您是否尝试过在
yield
部分中移动
acgresult
构造函数调用？我猜您是在尝试发出一组
acgresult
case class AggResult(bucketKey: String, bucketCount: Long, bucketValue: Double)

/* Error:(113, 35) value withFilter is not a member of
java.util.List[org.elasticsearch.search.aggregations.bucket.terms.Terms.Bucket]
for {
  bucket: Terms.Bucket <-  topLevelBuckets
*/

def extractAggResults_(client: TcpClient): Array[AggResult] = {

    val nestingAggregation = client.execute(aggQuery).await

    val topLevelBuckets = nestingAggregation.aggregations.termsResult("by_users").getBuckets
    topLevelBuckets.toArray() map(bucket =>  AggResult(bucket.asInstanceOf[Terms.Bucket].getKeyAsString, bucket.asInstanceOf[Terms.Bucket].getDocCount, bucket.asInstanceOf[Terms.Bucket].getAggregations.get("total_usage").asInstanceOf[Sum].getValue))
  }

import scala.collection.JavaConverters._

for {
  bucket <- topLevelBuckets.asScala
} yield AggResult(bucket.getKeyAsString, bucket.getDocCount,
    bucket.getAggregations.get("total_usage").asInstanceOf[Sum].getValue)