Test.java

package com.doublescoring.socredit;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Test {
	public static void main(String[] args) {
		int size = Arrays.asList(new OrderList(Arrays.asList(new Order(Arrays.asList("гавно", "шлак")))))
				.stream()
				.flatMap(orderList -> orderList.getOrders().stream())
				.flatMap(order -> order.getProducts().stream())
				.filter(s -> !"гавно".equals(s))
				.collect(Collectors.toList()).size();
		System.out.println(size);
	}

	public static class OrderList {
		public OrderList(List<Order> orders) {
			this.orders = orders;
		}

		private List<Order> orders;

		public List<Order> getOrders() {
			return orders;
		}

		public void setOrders(List<Order> orders) {
			this.orders = orders;
		}
	}

	public static class Order {
		public Order(List<String> products) {
			this.products = products;
		}

		private List<String> products;

		public List<String> getProducts() {
			return products;
		}

		public void setProducts(List<String> products) {
			this.products = products;
		}
	}
}