io.lettuce.core.search.aggregateutils

Class Apply<K,V>

java.lang.Object

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

Type Parameters:

K - Key type.

V - Value type.

All Implemented Interfaces:

PostProcessingOperation<K,V>

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

APPLY post-processing operation. Applies a 1-to-1 transformation expression on properties and stores the result as a new property.

APPLY can perform arithmetic operations on numeric properties or apply functions depending on property types.

Example Usage:

 
 {
     @code
     // Calculate total value from price and quantity
     Apply totalValue = Apply.of("@price * @quantity", "total_value");

     // Mathematical operations
     Apply discount = Apply.of("@price * 0.9", "discounted_price");
 }
 

Since:

7.5

Author:

Aleksandar Todorov

See Also:

PostProcessingOperation

Constructor Summary

Constructors

Constructor and Description
Apply(V expression, K name) Creates a new APPLY 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> Apply<K,V>	of(V expression, K name) Static factory method to create an Apply instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

Apply

public Apply(V expression,
             K name)

Creates a new APPLY operation.

Parameters:

expression - the expression to apply

name - the result field name

Method Detail

of

public static <K,V> Apply<K,V> of(V expression,
                                  K name)

Static factory method to create an Apply instance.

Type Parameters:

K - Key type

V - Value type

Parameters:

expression - the expression to apply

name - the name of the result field

Returns:

new Apply 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