io.cdap.transformation.api

Interface MutableRowValue

public interface MutableRowValue

Mutable vale of a row where you can set or get column value of a row via the column name. Also you can rename a column.

Method Summary

Modifier and Type	Method and Description
Object	getColumnValue(String columnName) Get the value of a column by its name.
void	renameColumn(String originalName, String newName) Rename a column.
void	setColumnValue(String columnName, Object value) Set the value of a column by its name.

Method Detail

getColumnValue

Object getColumnValue(String columnName)
               throws NotFoundException

Get the value of a column by its name. if the column was once renamed , the new name should be used to get the value.

Parameters:

columnName - the name of the column. Once column was renamed, new name should be used to get the value.

Returns:

the value of the corresponding column.

Throws:

NotFoundException - if the given column name doesn't exist.

setColumnValue

void setColumnValue(String columnName,
                    Object value)

Set the value of a column by its name. Once column was renamed, new name should be used to set the value. If the given column doesn't exist , a new column will be added.

Parameters:

columnName - the latest name of a column.

value - the value of the column.

Throws:

IllegalArgumentException - if the given column name is null.

renameColumn

void renameColumn(String originalName,
                  String newName)

Rename a column.

Parameters:

originalName - the original name of the column to be renamed.

newName - the new name of the column.

Throws:

IllegalArgumentException - will be thrown if the original column name doesn't exist or the new column name already exists.