openjpa/openjpa-examples/openbooks/web/cart.jsp

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<%--
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
--%>
<!-- =============================================================================================== -->
<!-- This JSP page demonstrates usage of OpenBookService to browse, select and purchase Books. -->
<!-- =============================================================================================== -->
<%@page import="openbook.server.OpenBookService"%>
<%@page import="openbook.domain.Book"%>
<%@page import="openbook.domain.Customer"%>
<%@page import="openbook.domain.ShoppingCart"%>
<%@page import="java.util.Map"%>
<%@page import="openbook.util.JSPUtility"%>
<%@include file="header.jsp"%>
<div id="help">
<h3>Shopping Cart</h3>
<% if (ACTION_ADD.equals(request.getParameter(KEY_ACTION))) {
%>
You have just added a Book to the cart.
<br>
<%
}
%>
A <a HREF="generated-html/openbook/domain/ShoppingCart.java.html#items" type="popup">Shopping Cart</a> contains
<a HREF="generated-html/openbook/domain/Book.java.html#class" type="popup">Books</a> that are persistent objects.
<a HREF="generated-html/openbook/domain/ShoppingCart.java.html#non-persistent" type="popup">
Shopping Cart</a> itself, however, is <em>not</em> a persistent object.
Shopping Cart is an in-memory data structure to hold the Books in the current web session and transfer
it to the server when a Purchase Order is to be placed.
</div>
<div id="content" style="display: block">
<%
OpenBookService service = (OpenBookService)session.getAttribute(KEY_SERVICE);
Customer customer = (Customer)session.getAttribute(KEY_USER);
ShoppingCart cart = (ShoppingCart)session.getAttribute(KEY_CART);
if (ACTION_ADD.equals(request.getParameter(KEY_ACTION))) {
String isbn = request.getParameter(KEY_ISBN);
Book book = (Book)session.getAttribute(isbn);
cart.addItem(book, 1);
}
if (cart.isEmpty()) {
%>
<%= customer.getName() %>, your Shopping Cart is empty.<br>
<A HREF="<%= PAGE_SEARCH %>">Continue Shopping</A>
<%
return;
}
%>
<table>
<caption><%= cart.getTotalCount() %> Book<%= cart.getTotalCount() == 1 ? "" : "s" %> in
<%= customer.getName() %>'s Shopping Cart</caption>
<thead>
<tr>
<th width="10em">Title</th>
<th width="6em">Price</th>
<th width="4em">Quantity</th>
</tr>
</thead>
<tfoot>
<tr>
<td><A HREF="<%= PAGE_SEARCH %>">Continue Shopping</A></td>
<td><A HREF="<%= PAGE_CHECKOUT %>">
<img src="images/checkout.gif"
width="156px" height="27px" border="0">
</A></td>
</tr>
</tfoot>
<tbody>
<%
Map<Book,Integer> books = cart.getItems();
int i = 0;
for (Book b : books.keySet()) {
%>
<TR class="<%= i++%2 == 0 ? ROW_STYLE_EVEN : ROW_STYLE_ODD %>">
<TD> <%= b.getTitle() %> </TD>
<TD> <%= JSPUtility.format(b.getPrice()) %> </TD>
<TD> <%= books.get(b) %> </TD>
</TR>
<%
}
%>
</tbody>
</table>
</div>
<%@include file="footer.jsp"%>