MediaInvoicer.java Source code

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Here is the source code for MediaInvoicer.java

Source

/*
 * 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;

}