table-inheritance/src/main/java/com/iluwatar/table/inheritance/VehicleDatabase.java - master - githubmirror/java-design-patterns

table-inheritance/src/main/java/com/iluwatar/table/inheritance/VehicleDatabase.java
91 строка3 KB
Ilkka Seppälä
deps: Refactor dependencies (#3224)
29 мар 2025, 20:34
29 мар 2025, 20:340ca162a
/*
 * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
 *
 * The MIT License
 * Copyright © 2014-2022 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.table.inheritance;

import java.util.HashMap;
import java.util.Map;
import java.util.logging.Logger;

/** Manages the storage and retrieval of Vehicle objects, including Cars and Trucks. */
public class VehicleDatabase {

  final Logger logger = Logger.getLogger(VehicleDatabase.class.getName());

  private Map<Integer, Vehicle> vehicleTable = new HashMap<>();
  private Map<Integer, Car> carTable = new HashMap<>();
  private Map<Integer, Truck> truckTable = new HashMap<>();

  /**
   * Saves a vehicle to the database. If the vehicle is a Car or Truck, it is added to the
   * respective table.
   *
   * @param vehicle the vehicle to save
   */
  public void saveVehicle(Vehicle vehicle) {
    vehicleTable.put(vehicle.getId(), vehicle);
    if (vehicle instanceof Car) {
      carTable.put(vehicle.getId(), (Car) vehicle);
    } else if (vehicle instanceof Truck) {
      truckTable.put(vehicle.getId(), (Truck) vehicle);
    }
  }

  /**
   * Retrieves a vehicle by its ID.
   *
   * @param id the ID of the vehicle
   * @return the vehicle with the given ID, or null if not found
   */
  public Vehicle getVehicle(int id) {
    return vehicleTable.get(id);
  }

  /**
   * Retrieves a car by its ID.
   *
   * @param id the ID of the car
   * @return the car with the given ID, or null if not found
   */
  public Car getCar(int id) {
    return carTable.get(id);
  }

  /**
   * Retrieves a truck by its ID.
   *
   * @param id the ID of the truck
   * @return the truck with the given ID, or null if not found
   */
  public Truck getTruck(int id) {
    return truckTable.get(id);
  }

  /** Prints all vehicles in the database. */
  public void printAllVehicles() {
    for (Vehicle vehicle : vehicleTable.values()) {
      logger.info(vehicle.toString());
    }
  }
}