Can I use for building java.util.function Interface Predicate<T> ?

[hrstoyanov]

Just came across YAVI, thank you for this wonderful, no-refletion, no-annotations, no-dependency java library!

Can I use this one for building complex Predicate<> for stream filtering? I think "fail fast" mode is good here, I also do not need to store info about exactly which property fails the test, just the validation/test result - true/false.

Any code example would be appreciated!

[making]

Hi, I'm not sure what you are looking for.

Something like this?

import java.util.List;
import java.util.stream.Stream;

import am.ik.yavi.builder.ValidatorBuilder;
import am.ik.yavi.core.Validator;

public record Car(String manufacturer, String licensePlate, Integer seatCount) {
	public static final Validator<Car> validator = ValidatorBuilder.<Car>of()
			.constraint(Car::manufacturer, "manufacturer", c -> c.notNull())
			.constraint(Car::licensePlate, "licensePlate", c -> c.notNull().greaterThanOrEqual(2).lessThanOrEqual(14))
			.constraint(Car::seatCount, "seatCount", c -> c.greaterThanOrEqual(2))
			.failFast(true)
			.build();

	public static void main(String[] args) {
		Stream<Car> stream = Stream.of(
				new Car(null, "DD-AB-123", 4),
				new Car("Morris", "D", 4),
				new Car("Morris", "DD-AB-123", 1),
				new Car("Morris", "DD-AB-123", 2));

		List<Car> filtered = stream.filter(car -> Car.validator.validate(car).isValid()).toList();
		System.out.println(filtered); // [Car[manufacturer=Morris, licensePlate=DD-AB-123, seatCount=2]]
	}
}

[hrstoyanov]

Something like this ... But I don't need to store information as to which attribute test failed, just the final result - true/false

[making]

YAVI is not designed to return "only true/false".