spark HasTrainingSummary 源码
spark HasTrainingSummary 代码
文件路径：/mllib/src/main/scala/org/apache/spark/ml/util/HasTrainingSummary.scala
/*
* 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.spark.ml.util
import org.apache.spark.SparkException
import org.apache.spark.annotation.Since
/**
* Trait for models that provides Training summary.
*
* @tparam T Summary instance type
*/
@Since("3.0.0")
private[ml] trait HasTrainingSummary[T] {
private[ml] final var trainingSummary: Option[T] = None
/** Indicates whether a training summary exists for this model instance. */
@Since("3.0.0")
def hasSummary: Boolean = trainingSummary.isDefined
/**
* Gets summary of model on training set. An exception is
* thrown if if `hasSummary` is false.
*/
@Since("3.0.0")
def summary: T = trainingSummary.getOrElse {
throw new SparkException(
s"No training summary available for this ${this.getClass.getSimpleName}")
}
private[ml] def setSummary(summary: Option[T]): this.type = {
this.trainingSummary = summary
this
}
}
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