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CS1322/p3/PostOffice.java

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+/**
+ *  <PRE>
+ *  PostOffice.java
+ *
+ *  Revisions: 1.0 Oct. 11, 2002
+ *               Created the PostOffice class
+ *			   1.1 Oct. 11, 2002
+ *				 Compiled, Finished, Commented
+ *			   2.0 Oct. 16, 2002
+ *				 Added Phase6 methods
+ *
+ *  </PRE>
+ *
+ *	Collaboration Statement:
+ *    I worked on the homework assignment alone, using only             
+ *    course materials.
+ *  
+ *  Created with JCreatorLE, some indents are off when viewed through notepad
+ *    or EMACS
+ *
+ *  @author <A HREF="mailto:gtg184g@mail.gatech.edu">Jose Manuel Caban</A>
+ *  @version Version 2.0, Oct. 16, 2002
+ */
+
+import java.util.*;
+
+public class PostOffice implements P3Type{
+  
+  public static final boolean bDebug = false; //nothing to debug via var tho
+  
+  HashTable htExpress = new HashTable(10);
+
+  
+  ///////////
+  //Methods//
+  ///////////
+  
+  /**
+   *Issue a mailbox with key as last name
+   *@param mbToAdd, the mailbox to be added
+   */
+  public void issue(MailBox mbToAdd){
+  	
+  	if(htExpress.get(mbToAdd.getStrLName()) == null){ //avoid duplicate
+  		htExpress.add(mbToAdd.getStrLName(),mbToAdd);
+  	}
+  }
+  
+  /**
+   *Return the mail in a given persons box
+   *@param strLName, the last name of the person
+   */
+  public String retrieve(String strLName){
+  	
+  	if(htExpress.get(strLName) == null){
+  		return P3Type.NO_MAILBOX;
+  	}
+  	
+  	MailBox mb = (MailBox)htExpress.get(strLName);
+  	Enumeration e = mb.getMail();
+  	String strLong = "";
+  	int count = 1; //for flair
+  	
+  	while(e.hasMoreElements()){
+  		strLong += "\nMessage " + count + ":\n" + 
+  					e.nextElement().toString() + "\n";
+  		count++;
+  	}
+  	return strLong;
+  }
+  
+  /**
+   *Send mail
+   *@param toSend, the message to be sent
+   */
+  public int send(Mail toSend){
+  	String strFromLName = "";
+  	String strToLName = "";
+  	  	
+  	StringTokenizer st;
+  	
+  	//verify sender
+  	st = new StringTokenizer(toSend.getStrFrom());
+  	
+  	while(st.hasMoreTokens()){
+  		strFromLName = st.nextToken();
+  	}
+  	
+  	if(htExpress.get(strFromLName) == null){
+  		return P3Type.BAD_SENDER;
+  	}
+  	
+  	//verify recipient  	
+  	st = new StringTokenizer(toSend.getStrTo());
+  	
+  	while(st.hasMoreTokens()){
+  		strToLName = st.nextToken();
+  	}
+  	
+  	if(htExpress.get(strToLName) == null){
+  		return P3Type.NO_RECIPIENT;
+  	}
+  	
+  	//add the mail
+  	MailBox mb = (MailBox)htExpress.get(strToLName);
+  	mb.addMail(toSend);
+  	
+  	return P3Type.MAIL_SENT;  	
+  }//end send(Mail)
+  
+  /**
+   *@param strLName, to be removed from PostOffice
+   *@return the number of unread messages in the box
+   */
+  public int remove(String strLName){
+  	
+  	if(htExpress.get(strLName) == null){
+  		return P3Type.NO_MAILBOX_NUM;
+  	}
+  	
+  	int count = 0;
+  	MailBox mTemp = (MailBox)htExpress.remove(strLName);
+  	Enumeration e = mTemp.getMail();
+  	
+  	//only because it looks cooler AND takes less typing
+  	for(;e.hasMoreElements();count++,e.nextElement());
+  	
+  	return count;
+  }//end remove(String)
+  
+  /**
+   *@return enumeration containing the mailboxes
+   */
+  public Enumeration allBoxes(){
+  	//this is a tough one
+  	//took 4 of the 5 hours of p3phase5
+  	return htExpress.elements();
+  }
+  
+  /**
+   *Resize the HashTable
+   *Doubles current size
+   */
+  public void resize(){
+  	htExpress.rehash(htExpress.size() * 2);
+  }
+  
+  /*	   */
+  /*Phase 6*/
+  /*	   */
+  
+  /**
+   *Write mailboxes to file and close program
+   */
+  public void leavingForTheDay(){
+  	FileChanger fc = new FileChanger(P3Type.POST_OFFICE);
+  	fc.initWriter();
+  	
+  	Enumeration e = htExpress.elements();
+  	while(e.hasMoreElements()){
+  		fc.writeObject(e.nextElement());
+  	}
+  	fc.closeWrite();
+  }
+  
+  /**********************************************************/
+  
+  /**
+   *  Debugging main for class PostOffice.  
+   *  This method will rigorously test my code.
+   *
+   *  <br><br>
+   *  @param args a String array of command line arguments.
+   */
+  public static void main(String[] args) {
+    
+    //System.testclass.for.me
+    //If Java is so smart, why doesn't it have that!
+    //by the way, how's that commenting style I just thought of /*stuff*/
+    
+    
+    /*Begin Test Class*/
+    PostOffice po = new PostOffice();
+    
+    //create test dummie...er...beta testers    
+    
+    //game gods
+    po.issue(new MailBox("Romero","John"));  //hmm, two John's maybe
+    po.issue(new MailBox("Carmack","John")); //I need a name change?
+    po.issue(new MailBox("Sweeney","Tim"));
+    po.issue(new MailBox("Miyamato","Shigeru"));
+    
+    //musical greatness
+    po.issue(new MailBox("Beethoven","Ludwik von"));//hehe test StringToken too
+    po.issue(new MailBox("Stravinsky","Igor"));
+    po.issue(new MailBox("Reznor","Trent"));
+    po.issue(new MailBox("Bowie","David"));
+    
+    //good anime characters
+    po.issue(new MailBox("Starwind","Gene"));
+    po.issue(new MailBox("Spiegel","Spike"));
+    
+    //assorted
+    po.issue(new MailBox("McGee","Mike"));  //that's Mike McGee of the IN
+    po.issue(new MailBox("Dole","Bob"));	//viva la Pfiezer!	
+    
+    	/*Test Exception*/
+    	po.issue(new MailBox("Romero","John"));
+    
+    /*Test Retrieve*/
+    po.send(new Mail("You're career has hit rock bottom","Carmack","Romero"));
+    po.send(new Mail("I mean games for the PalmPC!?","Sweeney","Romero"));
+    
+    	/*Test Exception*/
+    	if(po.send(new Mail("BOOOOOO","Bob","Romero")) == -1){
+    		System.out.println("BAD_SENDER");
+    	}
+    	//despite not receiving the mail, a response!
+    	if(po.send(new Mail("FU!","Romero","Bob")) == -2){
+    		System.out.println("BAD_RECIPIENT");
+    	}
+    	
+    System.out.println(po.retrieve("Romero"));
+    
+    /*Test Remove*/
+    	/*Test Exception*/
+    	System.out.println(po.remove("Romreo")); //oops :)
+    	
+    System.out.println(po.remove("Romero"));
+    
+    /*Nothing to test for resize() and allBoxes(), tested in HashTable*/
+    
+    /*End Test Class*/
+    
+  }// end of main(String[] args)
+
+}// end of class PostOffice