Package com.streamconverter.command.impl.csv

Class CsvFilterCommand

java.lang.Object

com.streamconverter.command.AbstractStreamCommand

com.streamconverter.command.impl.csv.CsvFilterCommand

All Implemented Interfaces:

IStreamCommand

public class CsvFilterCommand
extends AbstractStreamCommand

CSV Filter Command Class

This class implements pure data extraction from CSV using column selectors. Unlike CsvNavigateCommand which applies transformations, CsvFilterCommand only extracts/filters columns based on specified column names or indices without any modifications.

Features: - Extract specific columns using column names or indices - Preserve exact data values from extracted columns - Memory-efficient streaming processing - Support for multiple column selection

Field Summary

Fields inherited from class com.streamconverter.command.AbstractStreamCommand

log

Method Summary

Modifier and Type	Method	Description
static CsvFilterCommand	create(CSVPath columnSelector)	Factory method for CSV filtering with single typed column selector (assumes header exists).
static CsvFilterCommand	create(CSVPath columnSelector, boolean hasHeader)	Factory method for CSV filtering with single typed column selector.
void	execute(InputStream inputStream, OutputStream outputStream)	Executes the command on the provided input stream and writes the result to the output stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.streamconverter.command.IStreamCommand

commandName, withLogging, withLogging

Method Details

create

public static CsvFilterCommand create(CSVPath columnSelector)

Factory method for CSV filtering with single typed column selector (assumes header exists).

Parameters:

columnSelector - the typed CSVPath to extract

Returns:

a CsvFilterCommand instance

Throws:

IllegalArgumentException - if columnSelector is null

create

public static CsvFilterCommand create(CSVPath columnSelector,
 boolean hasHeader)

Factory method for CSV filtering with single typed column selector.

Parameters:

columnSelector - the typed CSVPath to extract

hasHeader - whether the CSV has a header row

Returns:

a CsvFilterCommand instance

Throws:

IllegalArgumentException - if columnSelector is null

execute

public void execute(InputStream inputStream,
 OutputStream outputStream)
             throws IOException

Description copied from class: AbstractStreamCommand

Executes the command on the provided input stream and writes the result to the output stream.

Specified by:

execute in interface IStreamCommand

Specified by:

execute in class AbstractStreamCommand

Parameters:

inputStream - The input stream to read data from.

outputStream - The output stream to write data to.

Throws:

IOException - If an I/O error occurs during the execution of the command.