ZCW-MesoLabs-Inheritance-ProductManager-BlueJ/Inventory.java

import java.util.Hashtable;
import java.util.Set;

/**
 * Write a description of class Inventory here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Inventory
{
    Hashtable<String, Product> productInventory;
    
    public Inventory() {
        productInventory = new Hashtable<String, Product>();
    }
    
    public void addItem(Product prod) {
        productInventory.put(prod.getID(), prod);
    }
    
    public void addItem(float price, int quantity, String id) {
        Product newItem = new Product(price, quantity, id);
        productInventory.put(id, newItem);
    }
    
    public Product getItem(String id) {
        return productInventory.get(id);
    }
    public int getOnHandQuantity(String id) {
        return productInventory.get(id).getOnHandQuantity() ;
    }
    public float getPrice(String id) {
        return productInventory.get(id).getPrice();
    }
    
    public void updatePrice(String id, float price) {
        productInventory.get(id).setPrice(price);
    }
    
    public void addUnits(String id, int quantity) {
        productInventory.get(id).addUnits(quantity);
    }
    
    public void removeUnits(String id, int quantity) {
        productInventory.get(id).removeUnits(quantity);
    }
    
    public double getInventoryValue() {
        double inventoryValue = 0;
        Set<String> productIDs = productInventory.keySet();
        
        for (String id : productIDs) {
            Product p = productInventory.get(id);
            int quantity = p.getOnHandQuantity();
            float price = p.getPrice();
            inventoryValue += quantity * price;
        }
        
        return inventoryValue;
    }
}