AbstractVehicle.java

package agency;

import util.TimeProvider;

public abstract class AbstractVehicle implements Vehicle {
  private static final int MINIMAL_YEAR_VALUE = 1900;
  private final String brand;
  private final String model;
  private final int productionYear;

  @Override
  public int hashCode() {
    int result = brand.hashCode();
    result = 31 * result + model.hashCode();
    result = 31 * result + productionYear;
    return result;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || this.getClass() != o.getClass()) return false;

    AbstractVehicle that = (AbstractVehicle) o;

    if (productionYear != that.productionYear) return false;
    if (!brand.equals(that.brand)) return false;
    return model.equals(that.model);
  }

  AbstractVehicle(String brand, String model, int productionYear) {
    int currentYearValue =  TimeProvider.currentYearValue();
    if(productionYear < MINIMAL_YEAR_VALUE || productionYear > currentYearValue)
      throw new IllegalArgumentException(productionYear + " is not a correct year (comprised between "
              + MINIMAL_YEAR_VALUE + " and " + currentYearValue + ")");
    this.productionYear = productionYear;
    this.brand = brand;
    this.model = model;
  }

  @Override
  public String getBrand() {
    return brand;
  }

  @Override
  public String getModel() {
    return model;
  }

  @Override
  public int getProductionYear() {
    return productionYear;
  }

  public abstract String kindOfVehicle();
  public abstract String vehicleDetails();

  @Override
  public String toString() {
    return kindOfVehicle() + " " + brand + " " + model + " " + productionYear + " (" + vehicleDetails() + ")" + " : "
            + dailyRentalPrice() + "€";
  }
}