package generics;

//: generics/Store.java

// Building up a complex model using generic containers.

import java.util.*;

import net.mindview.util.*;

class Product {

private final int id;

private String description;

private double price;

public Product(int IDnumber, String descr, double price) {

id = IDnumber;

description = descr;

this.price = price;

System.out.println(toString());

}

public String toString() {

return id + ": " + description + ", price: $" + price;

}

public void priceChange(double change) {

price += change;

}

public static Generator<Product> generator = new Generator<Product>() {

private Random rand = new Random(47);

public Product next() {

return new Product(rand.nextInt(1000), "Test", Math.round(rand

.nextDouble() * 1000.0) + 0.99);

}

};

}

class Shelf extends ArrayList<Product> {

public Shelf(int nProducts) {

Generators.fill(this, Product.generator, nProducts);

}

}

class Aisle extends ArrayList<Shelf> {

public Aisle(int nShelves, int nProducts) {

for (int i = 0; i < nShelves; i++)

add(new Shelf(nProducts));

}

}

class CheckoutStand {

}

class Office {

}

public class Store extends ArrayList<Aisle> {

private ArrayList<CheckoutStand> checkouts = new ArrayList<CheckoutStand>();

private Office office = new Office();

public Store(int nAisles, int nShelves, int nProducts) {

for (int i = 0; i < nAisles; i++)

add(new Aisle(nShelves, nProducts));

}

public String toString() {

StringBuilder result = new StringBuilder();

for (Aisle a : this)

for (Shelf s : a)

for (Product p : s) {

result.append(p);

result.append("\n");

}

return result.toString();

}

public static void main(String[] args) {

System.out.println(new Store(14, 5, 10));

}

} /*

* Output: 258: Test, price: $400.99 861: Test, price: $160.99 868: Test, price:

* $417.99 207: Test, price: $268.99 551: Test, price: $114.99 278: Test, price:

* $804.99 520: Test, price: $554.99 140: Test, price: $530.99 ...

*/// :~