productproxy.java

著名的uncle Bob的Agile software development的代码

public class ProductProxy implements Product
{
  private String itsSku;
  public ProductProxy(String sku)
  {
    itsSku = sku;
  }
  public int getPrice() throws Exception
  {
    ProductData pd = DB.getProductData(itsSku);
    return pd.price;
  }

  public String getName() throws Exception
  {
    ProductData pd = DB.getProductData(itsSku);
    return pd.name;
  }

  public String getSku() throws Exception
  {
    return itsSku;
  }
}