Package com.streamconverter.command.impl.json

Class JsonFilterCommand

java.lang.Object

com.streamconverter.command.AbstractStreamCommand

com.streamconverter.command.impl.json.JsonFilterCommand

All Implemented Interfaces:

IStreamCommand

public class JsonFilterCommand
extends AbstractStreamCommand

JSON Filter Command Class

This class implements pure data extraction from JSON using TreePath expressions. Unlike JsonNavigateCommand which applies transformations, JsonFilterCommand only extracts/filters data based on specified paths without any modifications.

Features: - Extract specific elements using TreePath expressions - Preserve exact data types and structure of extracted elements - Streaming processing via Jackson Streaming API (JsonParser/JsonGenerator); the document is never fully loaded into memory - Support for simple path expressions including wildcards ($[*].field, $.array[*].nested.field)

Field Summary

Fields inherited from class com.streamconverter.command.AbstractStreamCommand

log

Method Summary

Modifier and Type	Method	Description
static JsonFilterCommand	create(IPath<List<String>> jsonPath)	Factory method for JSON filtering with typed path 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 JsonFilterCommand create(IPath<List<String>> jsonPath)

Factory method for JSON filtering with typed path selector.

Parameters:

jsonPath - the typed path to extract data

Returns:

a JsonFilterCommand instance

Throws:

IllegalArgumentException - if jsonPath 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.