Enum and Generic
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
/**
* MediaInvoicer - Simple applicatin of Media, MediaFactory &c.
*
* @author ian
* @version $Id: MediaInvoicer.java,v 1.2 2004/03/08 03:30:59 ian Exp $
*/
public class MediaInvoicer {
public static void main(String[] args) throws IOException {
MediaInvoicer mi = new MediaInvoicer(System.in);
Invoice i = mi.getInvoice();
i.print(System.out);
}
BufferedReader myFile;
public MediaInvoicer(InputStream is) {
myFile = new BufferedReader(new InputStreamReader(is));
}
public Invoice getInvoice() throws IOException {
String line;
List < Item > items = new ArrayList < Item > ();
while ((line = myFile.readLine()) != null) {
if (line.startsWith("#")) {
continue;
}
StringTokenizer st = new StringTokenizer(line);
st.nextToken();
Media m = MediaFactory.getMedia(st.nextToken());
int stock = Integer.parseInt(st.nextToken());
int qty = Integer.parseInt(st.nextToken());
Item tmp = new Item(m, stock, qty);
items.add(tmp);
}
return new Invoice(1, 3,
(Item[]) items.toArray(new Item[items.size()]));
}
/** Inner class for line order item */
class Item {
Media product;
int stockNumber;
int quantity;
/**
* @param product
* @param stockNumber
* @param quantity
*/
public Item(Media product, int stockNumber, int quantity) {
super();
this.product = product;
this.stockNumber = stockNumber;
this.quantity = quantity;
}
public String toString() {
return "Item[" + product + " " + stockNumber + "]";
}
}
/** Inner class for one invoice */
class Invoice {
int orderNumber;
int custNumber;
Item[] items;
public Invoice(int orderNumber, int custNumber, Item[] items) {
super();
this.orderNumber = orderNumber;
this.custNumber = custNumber;
this.items = items;
}
public void print(PrintStream ps) {
ps.println("*** Invoice ***");
ps.println("Customer: " + custNumber + ")");
ps.println("Our order number: " + orderNumber);
for (int i = 0; i < items.length; i++) {
Item it = items[i];
ps.println(it);
}
}
}
}
enum Media {
book, music_cd, music_vinyl, movie_vhs, movie_dvd;
}
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