Pizza.java

package pizza.step7;

import org.apache.commons.lang.StringUtils;

import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;

public class Pizza {
  private final String size;
  private List toppings;
  private static final Map<String, Integer> basePrices;
  static {
    HashMap prices = new HashMap();
    prices.put("small", 10);
    prices.put("medium", 15);
    prices.put("large", 20);
    basePrices = prices;
  }

  private Pizza(String size) {
    this.size = size;
    this.toppings = new ArrayList();
  }

  public static Pizza small() {
    return new Pizza("small");
  }

  public static Pizza medium() {
    return new Pizza("medium");
  }

  public static Pizza large() {
    return new Pizza("large");
  }

  public String getSize() {
    return size;
  }

  public void addTopping(String s) {
    toppings.add(s);
  }

  public Object getToppings() {
    return StringUtils.join(toppings, ", ");
  }
  public int getPrice() {
    return getBasePrice() + getToppingPrice();
  }

  private int getBasePrice() {
    return basePrices.get(getSize());
  }

  private int getToppingPrice() {
    return toppings.size();
  }
  
}