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SPARK-7137 [ML] : Update SchemaUtils checkInputColumn to print more info if needed #5992

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SPARK-7137 [ML] : Update SchemaUtils checkInputColumn to print more info if needed #5992

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e3677c9
Merge pull request #1 from apache/master
rekhajoshm May 5, 2015
8993c0e
SPARK-7137: Add checkInputColumn back to Params and print more info
rekhajoshm May 7, 2015
acf3e17
update checkInputColumn to print more info if needed
rekhajoshm Jul 1, 2015
33ddd2e
update checkInputColumn to print more info if needed
rekhajoshm Jul 2, 2015
8c42b57
update checkInputColumn to print more info if needed
rekhajoshm Jul 3, 2015
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SPARK-7137: Add checkInputColumn back to Params and print more info
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@rekhajoshm
rekhajoshm committed May 7, 2015
commit 8993c0ec4542f3df89d673c1c13111f918037e24
15 changes: 14 additions & 1 deletion mllib/src/main/scala/org/apache/spark/ml/param/params.scala
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Expand Up @@ -24,7 +24,8 @@ import scala.annotation.varargs
import scala.collection.mutable

import org.apache.spark.annotation.AlphaComponent
import org.apache.spark.ml.util.Identifiable
import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
import org.apache.spark.sql.types.{DataType, StructType}

/**
* :: AlphaComponent ::
Expand Down Expand Up @@ -380,6 +381,18 @@ trait Params extends Identifiable with Serializable {
this
}

/**
* Check whether the given schema contains an input column.
* @param colName Input column name
* @param dataType Input column DataType
*/
protected def checkInputColumn(schema: StructType, colName: String, dataType: DataType): Unit = {
val actualDataType = schema(colName).dataType
SchemaUtils.checkColumnType(schema, colName, dataType)
require(actualDataType.equals(dataType), s"Input column Name: $colName Description: ${getParam(colName)}")
}


/**
* Gets the default value of a parameter.
*/
Expand Down