io.lettuce.core.search.aggregateutils

Class Filter

java.lang.Object

io.lettuce.core.search.aggregateutils.Filter

All Implemented Interfaces:

PostProcessingOperation

@Experimental
public class Filter
extends Object
implements PostProcessingOperation

FILTER post-processing operation. Filters results using predicate expressions on the current pipeline state.

Filters are applied after the query and relate to the current state of the pipeline. This allows filtering on computed fields created by APPLY operations or reducer results.

Example Usage:

 {
     @code
     // Filter by numeric comparison
     Filter priceFilter = Filter.of("@price > 100");

     // Filter by computed field
     Filter totalFilter = Filter.of("@total_value > 1000");
 }
 

Since:

7.5

Author:

Aleksandar Todorov

See Also:

PostProcessingOperation

Constructor Summary

Constructors

Constructor and Description
Filter(String expression) Creates a new FILTER operation.

Method Summary

Modifier and Type	Method and Description
void	build(CommandArgs<?,?> args) Build the operation arguments into the command args.
static Filter	of(String expression) Static factory method to create a Filter instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

Filter

public Filter(String expression)

Creates a new FILTER operation.

Parameters:

expression - the filter expression (e.g., "@price > 100", "@category == 'electronics'")

Method Detail

of

public static Filter of(String expression)

Static factory method to create a Filter instance.

Parameters:

expression - the filter expression

Returns:

new Filter instance

build

public void build(CommandArgs<?,?> args)

Description copied from interface: PostProcessingOperation

Build the operation arguments into the command args.

Specified by:

build in interface PostProcessingOperation

Parameters:

args - the command args to build into