Source code of the RSA phone book Java program

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//////////////////////////////////////// //// Phonebookview. java
Import java. Io. bufferedreader;
Import java. Io. inputstreamreader;

/*
* Created on Nov 23,200 5
*/

/**
* @ Author TNG
* View interface for the phone book application
* A simple line command interface is implemented
*/

Public class phonebookview {
/*
* Attributes transformed from UML by RSA:
*/

// Phonebookcontroller and phonebookmodel are generated by RSA
// To represent the Association Relationship
Private phonebookcontroller;
Private phonebookmodel;

/*
* Add my own attributes
*/

// The following are some questions to be asked to user
// Via the line command INTERFACE
Public static string add_name_q = "Please enter the exact person name ";
Public static string add_number_q = "Please enter the phone number ";
Public static string search_q = "Please enter the exact person name .";
Public static string idle_q =
"Please enter your choice of action,/" +
Phonebookcontroller. add_command + "/" to add a phone entry or/"" +
Phonebookcontroller. search_command +
"/" To search for a phone number or/"" +
Phonebookcontroller. quit_command + "/" to end the application .";
Public static string search_result_q =
"-This is the located phone number. Enter/" "+
Phonebookcontroller. start_command +
"/" To do more with the application or/"" +
Phonebookcontroller. quit_command + "/" to end the application .";
Public static string search_not_found_q =
"Phone number not found. Enter/" "+
Phonebookcontroller. start_command +
"/" To do more with the application or/"" +
Phonebookcontroller. quit_command + "/" to end the application .";
Public static string error_q =
"You 've entered an invalid choice. Enter/" +
Phonebookcontroller. start_command +
"/" To do more with the application or/"" +
Phonebookcontroller. quit_command + "/" to end the application .";

/**
* Operations transformed from UML by RSA
*/

/**
* Get called when the State has been changed
* @ Param newstate
*/
Public void statehaschanged (phonebookmodel model, string newstate ){
Phonebookmodel = model;
Changeview (newstate );
}

/**
* Change the view based on the new State
* @ Param newstate
*/
Public void changeview (string newstate ){
If (newstate. Equals (phonebookmodel. idle_state )){
Getuserinput (idle_q );
}
Else if (newstate. Equals (phonebookmodel. add_name_state )){
Getuserinput (add_name_q );
}
Else if (newstate. Equals (phonebookmodel. add_number_state )){
Getuserinput (add_number_q );
}
Else if (newstate. Equals (phonebookmodel. search_state )){
Getuserinput (search_q );
}
Else if (newstate. Equals (phonebookmodel. search_result_state )){
String result = phonebookmodel. getsearchresult ();
If (result = NULL | result. Length () = 0 ){
Getuserinput (search_not_found_q );
}
Else {
Getuserinput (result + search_result_q );
}
}
Else if (newstate. Equals (phonebookmodel. error_state )){
Getuserinput (error_q );
}
Else if (newstate. Equals (phonebookmodel. exit_state )){
System. Out. println ("Bye bye ");
}
}

/**
* Get user input based on question
* @ Param question
*/
Public void getuserinput (string question ){
Bufferedreader in =
New bufferedreader (New inputstreamreader (system. In ));
System. Out. println (question );
Try {
String answer = in. Readline (). Trim ();
Phonebookcontroller. userhasinput (answer );
}
Catch (exception e ){
E. printstacktrace ();
}
}

/**
* Add my own operations
*/

/**
* Constructor
* @ Param Controller
*/
Public phonebookview (phonebookcontroller Controller ){
Phonebookcontroller = controller;
}
}
//////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////////// //////////////////////

Phonebookmodel. Java

Import java. Io. bufferedreader;
Import java. Io. file;
Import java. Io. fileoutputstream;
Import java. Io. filereader;
Import java. Io. ioexception;
Import java. Io. printstream;
Import java. util. enumeration;
Import java. util. hashtable;

/*
* Created on Nov 23,200 5
*/

/**
* @ Author TNG
* Model data for the phone book application.
* The phone book entries are persisted to a file
*/

Public class phonebookmodel {

/*
* Attributes transformed from UML by RSA
*/

// Phonebookview is generated by RSA
// To represent the Association Relationship
Private phonebookview;

/*
* Add my own attributes
*/

// The following are varous States captured by the Model
Public static string add_name_state = "add_name ";
Public static string add_number_state = "add_number ";
Public static string search_state = "Search ";
Public static string idle_state = "idle ";
Public static string search_result_state = "search_result ";
Public static string error_state = "error ";
Public static string exit_state = "exit ";

// Private fields used to track various model data
Private string state = idle_state;
Private string searchresult = NULL;
Private hashtable phonebook = NULL;

// For persisting the phone book entries into a file
Private Static final string record_file = "phonebook.txt ";
Private Static final string record_separator = "_ Sep _";

/**
* Operations transformed from UML by RSA
*/

/**
* Set the state
* @ Param astate
*/
Public void setstate (string astate ){
State = astate;
Phonebookview. statehaschanged (this, State );
}

/**
* Add a phone entry
* @ Param name
* @ Param number
*/
Public void addanentry (string name, string number ){
Phonebook. Put (name, number );
}

/**
* Search the phone number and set the searchresult Field
* @ Param name
*/
Public void searchphonenumber (string name ){
Searchresult = (string) Phonebook. Get (name );
}

/**
* Return the search result
*/
Public String getsearchresult (){
Return searchresult;
}

/**
* Get the state
*/
Public String getstate (){
Return state;
}

/**
* Add my own operations
*/

/**
* Constructor
* @ Param View
*/
Public phonebookmodel (phonebookview view ){
Phonebookview = view;
Phonebook = new hashtable ();
Readrecord ();
}

/**
* Save all the phone entries
*/
Public void saveall (){
Writerecord ();
}

/**
* Read the phone entries from the file
*/
Private void readrecord ()
{
File recordfile;

Try {
Recordfile = new file (record_file );
Int I = 0;
If (! Recordfile. createnewfile ()){
Bufferedreader in =
New bufferedreader (New filereader (recordfile ));

For (I = 0; I <3; I ++ ){
String record = in. Readline ();
If (record! = NULL & record. Length ()! = 0 ){
Int separatorindex =
Record. indexof (record_separator );
If (separatorindex! =-1 ){
String name = record. substring
(0, separatorindex );
String number = record. substring
(Separatorindex + record_separator.length ());
Phonebook. Put (name, number );
}
}
}
In. Close ();
}
}
Catch (exception e ){
E. printstacktrace ();
}
}

/**
* Write the phone entries to file
*/
Private void writerecord ()
{
File recordfile;
Try {
Recordfile = new file (record_file );
Fileoutputstream out = new fileoutputstream (record_file );
Printstream P = new printstream (out );

Enumeration E = phonebook. Keys ();
While (E. hasmoreelements ()){
String name = (string) E. nextelement ();
String number = (string) Phonebook. Get (name );
String newrecord = Name + record_separator + number;
P. println (newrecord );
}
P. Close ();
}
Catch (ioexception e ){
E. printstacktrace ();
}
}
}

//////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////////// //////////////////

Phonebookcontroller. Java

/*
* Created on Nov 23,200 5
*/

/**
* @ Author TNG
* Controller for the phone book application
* No sophisticated error handling is implemented
*/

Public class phonebookcontroller {
/*
* Attributes transformed from UML by RSA:
*/

// Phonebookmodel and phonebookview are generated by RSA
// To represent the Association Relationship
Private phonebookmodel;
Private phonebookview;

/*
* Add my own attributes
*/

// The following are some commands that initiated
// User defined selection
Public static string start_command = "start ";
Public static string quit_command = "quit ";
Public static string add_command = "add ";
Public static string search_command = "Search ";

// A private field used to track user defined input of Person Name
Private string name;

/**
* Operations transformed from UML by RSA
*/

/**
* Called by phonebookview to your y user has input
* @ Param userinput
*/
Public void userhasinput (string userinput ){
String currentstate = phonebookmodel. getstate ();

If (userinput! = NULL & userinput. Length ()! = 0 ){
If (currentstate. Equals (phonebookmodel. idle_state )){
If (userinput. Equals (add_command )){
Phonebookmodel. setstate
(Phonebookmodel. add_name_state );
}
Else if (userinput. Equals (search_command )){
Phonebookmodel. setstate
(Phonebookmodel. search_state );
}
Else if (userinput. Equals (quit_command )){
Phonebookmodel. saveall ();
Phonebookmodel. setstate
(Phonebookmodel. exit_state );
}
Else {
Phonebookmodel. setstate
(Phonebookmodel. error_state );
}
}
Else if (currentstate. equals
(Phonebookmodel. add_name_state )){
Name = userinput;
Phonebookmodel. setstate
(Phonebookmodel. add_number_state );
}
Else if (currentstate. equals
(Phonebookmodel. add_number_state )){
Phonebookmodel. addanentry (name, userinput );
Phonebookmodel. setstate (phonebookmodel. idle_state );
}
Else if (currentstate. Equals (phonebookmodel. search_state )){
Phonebookmodel. searchphonenumber (userinput );
Phonebookmodel. setstate
(Phonebookmodel. search_result_state );
}
Else if (currentstate. equals
(Phonebookmodel. search_result_state) |
Currentstate. equals
(Phonebookmodel. error_state )){
If (userinput. Equals (start_command )){
Phonebookmodel. setstate
(Phonebookmodel. idle_state );
}
Else if (userinput. Equals (quit_command )){
Phonebookmodel. saveall ();
Phonebookmodel. setstate
(Phonebookmodel. exit_state );
}
Else {
Phonebookmodel. setstate
(Phonebookmodel. error_state );
}
}
}
Else {
Phonebookmodel. setstate (phonebookmodel. error_state );
}
}

/**
* Start the application
*/
Public void start (){
Phonebookmodel. setstate (phonebookmodel. idle_state );
}

/**
* Add my own operations
*/

/**
* Constructor
*/
Public phonebookcontroller (){
Phonebookview = new phonebookview (this );
Phonebookmodel = new phonebookmodel (phonebookview );
}

/**
* Main
* @ Param ARGs
*/
Public static void main (string [] ARGs)
{
Phonebookcontroller controller = new phonebookcontroller ();
Controller. Start ();
}
}