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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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9 changes: 7 additions & 2 deletions mllib/src/main/scala/org/apache/spark/ml/util/SchemaUtils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -34,10 +34,15 @@ object SchemaUtils {
* @param colName column name
* @param dataType required column data type
*/
def checkColumnType(schema: StructType, colName: String, dataType: DataType): Unit = {
def checkColumnType(
schema: StructType,
colName: String,
dataType: DataType,
msg: String = ""): Unit = {
val actualDataType = schema(colName).dataType
val message = if (msg != null && msg.trim.length > 0) " " + msg else ""
require(actualDataType.equals(dataType),
s"Column $colName must be of type $dataType but was actually $actualDataType.")
s"Column $colName must be of type $dataType but was actually $actualDataType.$message")
}

/**
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