cartevent.java

一个优秀的供应商管理系统

package apusic.myshop.control.event;



import java.util.Collection;
import java.util.HashMap;

/**
 * This class represents a shopping cart event.
 * It allows updates on multiple items in the shopping cart.
 */
public class CartEvent extends BaseEvent implements java.io.Serializable {

  public static final int ADD_ITEM = 0;
  public static final int DELETE_ITEM = 1;
  public static final int UPDATE_ITEM = 2;

  private int actionType;
  private Collection itemIds;
  private HashMap quantities;

  public CartEvent(int actionType, Collection itemIds) {
    this.actionType = actionType;
    this.itemIds = itemIds;
  }

  public CartEvent(int actionType, Collection itemIds, HashMap quantities) {
    this.actionType = actionType;
    this.itemIds = itemIds;
    this.quantities = quantities;
  }

  public Collection getItemIds() {
    return itemIds;
  }

  public int getActionType() {
    return actionType;
  }

  public int getItemQty(String itemId) {
    if (quantities != null) return ((Integer)quantities.get(itemId)).intValue();
    else return -1;
  }

  public String toString() {
    return "CartEvent(" + actionType + ", " + itemIds + ")";
  }
}