io.lettuce.core.search.aggregateutils

Class Filter<K,V>

java.lang.Object

io.lettuce.core.search.aggregateutils.Filter<K,V>

Type Parameters:

K - Key type.

V - Value type.

All Implemented Interfaces:

PostProcessingOperation<K,V>

@Experimental
public class Filter<K,V>
extends Object
implements PostProcessingOperation<K,V>

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(V expression) Creates a new FILTER operation.

Method Summary

Modifier and Type	Method and Description
void	build(CommandArgs<K,V> args) Build the operation arguments into the command args.
static <K,V> Filter<K,V>	of(V 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(V expression)

Creates a new FILTER operation.

Parameters:

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

Method Detail

of

public static <K,V> Filter<K,V> of(V expression)

Static factory method to create a Filter instance.

Type Parameters:

K - Key type

V - Value type

Parameters:

expression - the filter expression

Returns:

new Filter instance

build

public void build(CommandArgs<K,V> args)

Description copied from interface: PostProcessingOperation

Build the operation arguments into the command args.

Specified by:

build in interface PostProcessingOperation<K,V>

Parameters:

args - the command args to build into