CartItemSet.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2014 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.financials.cart;
 
import java.io.Serializable;
import java.util.Iterator;
import java.util.TreeSet;
 
public class CartItemSet extends TreeSet<CartItem> implements Serializable {
 
  public boolean addItem(CartItem cartItem) {
    removeGarbage();
    if(cartItem.isValid()) {
      add(cartItem);
      reorder();
      return true;
    }
    return false;
  }
  
  public void removeItem(int order) {
    Iterator<CartItem> it = iterator();
    while(it.hasNext()) {
      if(it.next().getOrder() == order) {
        it.remove();
        break;
      }
    }
    reorder();
  }
 
  private void removeGarbage() {
    Iterator<CartItem> it = iterator();
    while(it.hasNext()) {
      if(!(it.next().isValid())) {
        it.remove();
      }
    }
  }
 
  private void reorder() {
    int count = 1;
    for(CartItem ci : this) {
      ci.setOrder(count++);
    }
  }
  
}