www.pudn.com > chap8.rar > MailboxFactory.java

package chap8; 
 
import java.util.*; 
 
/** 
 * Produces Mailboxes from some back-end database. 
 */ 
public class MailboxFactory { 
 
    /** 
     * Get a mailbox for a particular user. 
     */ 
    public static Mailbox getMailbox(String username) { 
 
        // this implementation is completely fake. It could be swapped 
        // out with an EJB implementation, for example 
        Map folders = new HashMap(); 
 
        // build new folders 
        List messages = new ArrayList(); 
        messages.add(new MessageHeader( 
                0, "dexter@yahoo.com", "burke_e@ociweb.com", 
                "[no subject]", 
                createDate(2001, Calendar.JANUARY, 1, 8, 0, 23))); 
        messages.add(new MessageHeader( 
                1, "spammer@hidden.net", "burke_e@yahoo.com", 
                "Get rich quick!", 
                createDate(2001, Calendar.JANUARY, 3, 8, 16, 45))); 
        messages.add(new MessageHeader( 
                2, "a3947k@hotmail.com", "burke_e@yahoo.com", 
                "Here's an offer you can't refuse", 
                createDate(2001, Calendar.JANUARY, 4, 6, 32, 25))); 
        messages.add(new MessageHeader( 
                3, "sally123@mindspring.com", "burke_e@ociweb.com", 
                "A friend referred you to me", 
                createDate(2001, Calendar.JANUARY, 6, 12, 20, 14))); 
        messages.add(new MessageHeader( 
                4, "joe001", "burke_e@ociweb.com", 
                "Did you hear about this?", 
                createDate(2001, Calendar.JANUARY, 9, 3, 45, 20))); 
        messages.add(new MessageHeader( 
                5, "jill0393@mindspring.com", "burke_e@ociweb.com", 
                "Let me tell you about this", 
                createDate(2001, Calendar.FEBRUARY, 2, 3, 10, 57))); 
        messages.add(new MessageHeader( 
                6, "autoreply@nospam.com", "burke_e@ociweb.com", 
                "How's it going?", 
                createDate(2001, Calendar.FEBRUARY, 3, 5, 45, 20))); 
 
        folders.put(Mailbox.INBOX, new MailFolder(Mailbox.INBOX, messages)); 
 
 
        // create another dummy folder 
        messages = new ArrayList(); 
        messages.add(new MessageHeader( 
                7, "jen@yahoo.com", "burke_e@ociweb.com", 
                "How's it going?", 
                createDate(2001, Calendar.FEBRUARY, 3, 5, 45, 20))); 
        folders.put("Personal", new MailFolder("Personal", messages)); 
 
        return new Mailbox(username, folders); 
    } 
 
    // prevent instantiation of this class 
    private MailboxFactory() { 
    } 
 
    // a simple helper method to create fake dates 
    private static Date createDate(int year, int month, int date, 
            int hour, int minute, int second) { 
        Calendar cal = Calendar.getInstance(); 
        cal.set(year, month, date, hour, minute, second); 
        return cal.getTime(); 
    } 
}