io.cdap.wrangler.utils

Class ColumnConverter

java.lang.Object

io.cdap.wrangler.utils.ColumnConverter

public final class ColumnConverter
extends Object

Utility class that converts a Row column into another column.

Method Summary

Modifier and Type	Method and Description
static void	convertType(String directiveName, Row row, String column, String toType, Integer scale, RoundingMode roundingMode) Converts the column type into another type.
static io.cdap.cdap.api.data.schema.Schema	getSchemaForType(String type, Integer scale)
static void	rename(String directiveName, Row row, String column, String toName) Renames a column.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

rename

public static void rename(String directiveName,
                          Row row,
                          String column,
                          String toName)
                   throws DirectiveExecutionException

Renames a column. The renamed column must not exist in the row. The comparision is case insensitive.

Parameters:

row - source record to be modified.

column - name of the column within source record.

toName - the target name of the column.

Throws:

DirectiveExecutionException - when a column matching the target name already exists

convertType

public static void convertType(String directiveName,
                               Row row,
                               String column,
                               String toType,
                               Integer scale,
                               RoundingMode roundingMode)
                        throws DirectiveExecutionException

Converts the column type into another type. Only target types int, short, long, double, boolean, string, and bytes are supported.

Parameters:

row - source record to be modified.

column - name of the column within source record.

toType - the target type of the column.

Throws:

DirectiveExecutionException - when an unsupported type is specified or the column can not be converted.

getSchemaForType

public static io.cdap.cdap.api.data.schema.Schema getSchemaForType(String type,
                                                                   Integer scale)
                                                            throws DirectiveParseException

Throws:

DirectiveParseException