Package com.lumiomedical.etl.dataframe.processor.column

Class CompileColumnsToJSONProcessor

java.lang.Object

com.lumiomedical.etl.dataframe.processor.column.CompileColumnsToJSONProcessor

All Implemented Interfaces:

TableProcessor

public class CompileColumnsToJSONProcessor
extends Object
implements TableProcessor

This transformer will turn a series of column into a single JSON object stored in a new column. This can be helpful when attempting to merge/append dataframes with different column schemas: we can compile extraneous columns into a single one if we need their contents down the line, and only retain columns that are in common. An optional "dropColumns" argument can be passed in order to require the removal of compiled columns.

Author:

Pierre Lecerf ([email protected]) Created on 2020/08/20

Constructor Summary

Constructors

Constructor	Description
CompileColumnsToJSONProcessor(String columnName, boolean dropColumns, String... columns)
CompileColumnsToJSONProcessor(String columnName, boolean dropColumns, Collection<String> columns)
CompileColumnsToJSONProcessor(String columnName, String... columns)
CompileColumnsToJSONProcessor(String columnName, Collection<String> columns)

Method Summary

Modifier and Type	Method	Description
tech.tablesaw.api.Table	process(tech.tablesaw.api.Table table)

Methods inherited from class java.lang.Object

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

Constructor Details

CompileColumnsToJSONProcessor

public CompileColumnsToJSONProcessor(String columnName, Collection<String> columns)

CompileColumnsToJSONProcessor

public CompileColumnsToJSONProcessor(String columnName, String... columns)

CompileColumnsToJSONProcessor

public CompileColumnsToJSONProcessor(String columnName, boolean dropColumns, String... columns)

CompileColumnsToJSONProcessor

public CompileColumnsToJSONProcessor(String columnName, boolean dropColumns, Collection<String> columns)

Parameters:

columnName -

columns -

dropColumns -

Method Details

process

public tech.tablesaw.api.Table process(tech.tablesaw.api.Table table) throws TableProcessorException

Specified by:

process in interface TableProcessor

Returns:

Throws:

TableProcessorException