// ItemInfo.java
package model;

import server.*;

public class ItemVO implements java.io.Serializable
{
    
    private String itemID;
    private String description;
    private int quantity;
    private double price;
    
    public ItemVO(String itemID,String description, int quantity, double price) throws ShoppingException
    {
        setID(itemID);
        setDescription(description);
        setQuantity(quantity);
        setPrice(price);
    }
    
    public String getID()
    { 
        return itemID; 
    }
    
    public String getDescription()
    {
        return description; 
    }
    
    public int getQuantity()
    { 
        return quantity; 
    }
    
    public double getPrice()
    { 
        return price; 
    }
    
    public void setID(String itemID) throws ShoppingException
    {
        if ((itemID == null) || itemID.equals(""))
            throw new ShoppingException("Invalid ID");
        this.itemID = itemID;
    }
    
    public void setDescription(String description) throws ShoppingException
    {
        if ((description == null) || description.equals(""))
            throw new ShoppingException("Invalid description");
        this.description = description;
    }
    
    public void setQuantity(int quantity) throws ShoppingException
    {
        if (quantity < 0) throw
                new ShoppingException("Quantity cannot be less than 0");
        this.quantity = quantity;
    }
    
    public void setPrice(double price) throws ShoppingException
    {
        if (price < 0) throw
                new ShoppingException("Price cannot be less than 0");
        this.price = price;
    }
    
    public void changeQuantity(int delta) throws ShoppingException
    {
        quantity += delta;
        if (quantity < 0) throw
                new ShoppingException("Quantity cannot be less than 0");
    }
    
    
    public int hashCode()
    {
        return itemID.hashCode();
    }
    
    public boolean equals(Object object)
    {
        boolean identical = false;
        if (object instanceof ItemVO)
        {
            ItemVO other = (ItemVO)object;
            if (itemID.equalsIgnoreCase(other.itemID))
                identical = true;
        }
        return identical;
    }
    
    public String toString()
    {
        return itemID + ":" + description + ":" + quantity + ":" + price;
    }
}