GroceryStoreImpl.java

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package etm.tutorial.fiveminute.store;

import etm.tutorial.fiveminute.store.dao.StockDao;
import etm.tutorial.fiveminute.store.model.Item;
import etm.tutorial.fiveminute.store.model.OrderStatus;

import java.util.List;

/**
 * Default GroceryStore implementation.
 *
 * @author void.fm
 * @version $Revision$
 */
public class GroceryStoreImpl implements GroceryStore {

  private StockDao stockDao;
  private int orderId = 0;


  public GroceryStoreImpl(StockDao aStockDao) {
    this.stockDao = aStockDao;
  }

  public OrderStatus buy(int aItemId, int quantity) throws UnknownArticleException {
    Item orderedItem = stockDao.getItem(aItemId);
    if (orderedItem == null) {
      throw new UnknownArticleException();
    }
    if (stockDao.addOrder(orderedItem, quantity)) {
      return new OrderStatus(orderedItem, ++orderId);
    } else {
      return new OrderStatus(orderedItem);
    }
  }


  public List listStock() {
    return stockDao.getCurrentStock();
  }

}