io.lettuce.core.search.aggregateutils

Class Apply

java.lang.Object

io.lettuce.core.search.aggregateutils.Apply

All Implemented Interfaces:

PostProcessingOperation

@Experimental
public class Apply
extends Object
implements PostProcessingOperation

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(String expression, String name) Creates a new APPLY operation.

Method Summary

Modifier and Type	Method and Description
void	build(CommandArgs<?,?> args) Build the operation arguments into the command args.
static Apply	of(String expression, String 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(String expression,
             String name)

Creates a new APPLY operation.

Parameters:

expression - the expression to apply

name - the result field name

Method Detail

of

public static Apply of(String expression,
                       String name)

Static factory method to create an Apply instance.

Parameters:

expression - the expression to apply

name - the name of the result field

Returns:

new Apply 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