📄 htmlsalesformatter.java
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import java.util.*;
/**
* The class HTMLSalesFormatter implements the interface <code>SalesFormatter</code>.
* This class is implemented as a singleton so a new object will not be
* created every time the HTML format is used.
*
* @author 张维
* @version 1.0.0
* @see SalesFormatter
* @see Order
* @see Product
* @see OrderItem
* @see Sales
* @see Catalog
* @see Coffee
* @see CoffeeBrewer
*/
public class HTMLSalesFormatter implements SalesFormatter {
/* Line separator */
private static final String NEW_LINE = System.getProperty("line.separator");
/*The single instance of class HTMLSalesFormatter */
private static HTMLSalesFormatter singletonInstance = null;
/**
* Returns the single instance of class <code>HTMLSalesFormatter</code>
*
* @return the single instance of class <code>HTMLSalesFormatter</code>
*/
public static HTMLSalesFormatter getSingletonInstance( ) {
if (singletonInstance == null) {
singletonInstance = new HTMLSalesFormatter();
}
return singletonInstance;
}
/**
* The constructor is declared private so other classes cannot
* create an instance of this class.
*/
private HTMLSalesFormatter( ) {
}
/**
* Returns an HTML representation of the specified sales.
*
* @param sales the Sales object that contains the orders that have been sold.
* @return an HTML representation of the specified <code. Sales} object.
*/
public String formatSales(Sales sales) {
String s = "<html>" + NEW_LINE + " <body>" + NEW_LINE
+ " <center><h2>Orders</h2></center>" + NEW_LINE;
for(Iterator iterator = sales.getOrdersIterator( ); iterator.hasNext( );) {
Order order = (Order)iterator.next( );
s = s + " <hr>" + NEW_LINE + " <h4>Total = "
+ order.getTotalCost( ) + "</h4>" + NEW_LINE;
Iterator iterator1 = order.getItemsIterator( );
while(iterator1.hasNext( )) {
OrderItem orderitem = (OrderItem)iterator1.next( );
s = s + " <p>" + NEW_LINE + " <b>code:</b> "
+ orderitem.getProduct( ).getCode( ) + "<br>" + NEW_LINE
+ " <b>quantity:</b> " + orderitem.getQuantity( ) + "<br>" + NEW_LINE
+ " <b>price:</b> " + orderitem.getProduct( ).getPrice( ) + NEW_LINE
+ " </p>" + NEW_LINE;
}
}
s = s + " </body>" + NEW_LINE + "</html>";
return s;
}
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