I have deep hierarchal object that I need to validate. My question is how to accumulate and validate all validations in the data structure in one traversal?
In the below example, suppose I want to vaildate OrderDocument and OrderItem in one traversal, how to compose, traverse and add multiple validation in lens composition?
final Lens<Order, List<OrderDocument>> orderDocumentsLens =
Lens.lens(Order::getOrderDocuments, ds -> cr -> cr.withOrderDocuments(ds));
final Lens<OrderDocument, List<OrderItem>> orderItemsLens =
Lens.lens(OrderDocument::getOrderItems, is -> crd -> crd.withOrderItems(is));
final Lens<OrderItem, List<OrderItemProperties>> orderItemPropertiesLens =
Lens.lens(OrderItem::getOrderItemProperties, sls -> i -> i.withOrderItemProperties(sls));
final List<String> fail = orderDocumentsLens.composeTraversal(List.Optic.traversal())
.composeLens(orderItemsLens).composeTraversal(List.Optic.traversal())
.composeLens(orderItemPropertiesLens).composeTraversal(List.Optic.traversal())
.modifyValidationF(Semigroup.stringSemigroup, this::validateItemProperties)
.f(order)
.accumulate().fail();
private Validation<String, OrderItemProperties> validateItemProperties(OrderItemProperties properties) {
return Validation.success(properties);
}
I have deep hierarchal object that I need to validate. My question is how to accumulate and validate all validations in the data structure in one traversal?
In the below example, suppose I want to vaildate OrderDocument and OrderItem in one traversal, how to compose, traverse and add multiple validation in lens composition?