src/repository/ProductRepository.java - master - itokar98/HomeWorkPatternsSolidTask1

src/repository/ProductRepository.java
64 строки2 KB
Ilya Tokar
first_commit
19 ноя 2025, 01:14
19 ноя 2025, 01:148a62050
package repository;

import model.Product;

import java.util.*;

public class ProductRepository {
    private Map<Long, Product> products = new HashMap<>();

    public ProductRepository() {
        // Initialize with sample data
        products.put(1L, new Product(1L, "Laptop", "Dell", 999.99, "Electronics"));
        products.put(2L, new Product(2L, "Phone", "Samsung", 699.99, "Electronics"));
        products.put(3L, new Product(3L, "Book", "O'Reilly", 29.99, "Education"));
        products.put(4L, new Product(4L, "Headphones", "Sony", 199.99, "Electronics"));
        products.put(5L, new Product(5L, "Coffee Mug", "KitchenPro", 12.99, "Kitchen"));
    }

    public Optional<Product> findById(Long id) {
        return Optional.ofNullable(products.get(id));
    }

    public List<Product> findAll() {
        return new ArrayList<>(products.values());
    }

    public List<Product> findByCategory(String category) {
        return products.values().stream()
                .filter(product -> product.getCategory().equalsIgnoreCase(category))
                .toList();
    }

    public List<Product> findByManufacturer(String manufacturer) {
        return products.values().stream()
                .filter(product -> product.getManufacturer().equalsIgnoreCase(manufacturer))
                .toList();
    }

    public List<Product> searchByName(String keyword) {
        return products.values().stream()
                .filter(product -> product.getName().toLowerCase().contains(keyword.toLowerCase()))
                .toList();
    }

    public List<Product> findByPriceRange(double minPrice, double maxPrice) {
        return products.values().stream()
                .filter(product -> product.getPrice() >= minPrice && product.getPrice() <= maxPrice)
                .toList();
    }

    public void addProduct(Product product) {
        products.put(product.getId(), product);
    }

    public void updateProduct(Product product) {
        if (products.containsKey(product.getId())) {
            products.put(product.getId(), product);
        }
    }

    public void deleteProduct(Long id) {
        products.remove(id);
    }
}