ch7.accountCookie
Class ControllerHelper

java.lang.Object
  shared.HelperBaseCh4
      shared.HelperBaseCh5
          shared.HelperBaseCh6
              ch7.accountLogin.ControllerHelper
                  ch7.accountCookie.ControllerHelper

public class ControllerHelper
extends ControllerHelper

Write the cookie when new data is saved; read the cookie when a new request is started.

The cookie will be read in the method that is called when a Get request is made. This is considered a new request, so only read the cookie at that time.

Nested Class Summary

Nested classes/interfaces inherited from class shared.HelperBaseCh4

HelperBaseCh4.SessionData

Field Summary

Fields inherited from class ch7.accountLogin.ControllerHelper

data

Fields inherited from class shared.HelperBaseCh6

checked, selected

Fields inherited from class shared.HelperBaseCh4

logger, request, response

Constructor Summary

ControllerHelper(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
Call the base class constructor to store the request and response.

Method Summary

protected void	doGet() GET is considered a new request, so the old data is not read and the JSP is always for the edit page.
protected void	doPost() Call the super class doPost method.
java.lang.String	getMethod() The default method.
java.lang.String	jspLocation(java.lang.String page) Encapsulates the location of the JSPs.
java.lang.String	newUserMethod() If new user is cliked, then create a new bean and go to the login page.
java.lang.String	processMethod() The method to call when the process button is clicked.

Methods inherited from class ch7.accountLogin.ControllerHelper

confirmMethod, copyFromSession, editMethod, getData, initHibernate, loginMethod

Methods inherited from class shared.HelperBaseCh6

addChecked, addChoice, addSelected, clearMaps, clearProperty, getChecked, getSelected, invokeGetter, setCheckedAndSelected, setCheckedAndSelected

Methods inherited from class shared.HelperBaseCh5

getErrors, isValid, isValidProperty, setErrors

Methods inherited from class shared.HelperBaseCh4

addHelperToSession, addHelperToSession, executeButtonMethod, executeButtonMethod, fillBeanFromRequest, invokeButtonMethod, writeError

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ControllerHelper

public ControllerHelper(javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response)

Call the base class constructor to store the request and response.

Parameters:

request - Request information encapsulated in a Java object

response - Response information encapsulated in a Java object

Method Detail

jspLocation

public java.lang.String jspLocation(java.lang.String page)

Encapsulates the location of the JSPs.

Overrides:

jspLocation in class ControllerHelper

Parameters:

page - The file name of the JSP.

Returns:

The full path to the JSP.

getMethod

public java.lang.String getMethod()

The default method. It is not associated with any button.

Look for a cookie named "account". If it exists, then look for an account with the value of the cookie in the database. If it is there, then set the database bean as the current data and go to the edit page; otherwise, go to the login page.

Overrides:

getMethod in class ControllerHelper

Returns:

The address for the JSP.

newUserMethod

public java.lang.String newUserMethod()

If new user is cliked, then create a new bean and go to the login page.

Overrides:

newUserMethod in class ControllerHelper

Returns:

The address of the JSP.

processMethod

public java.lang.String processMethod()

The method to call when the process button is clicked.

Test if the data is still valid; if it isn't, then the session has expired. If the data is valid, then save it to the database

Write the account number to a cookie named "account".

Retrieve all the data from the database and add it to the request so that the JSPs can access it.

The method is adorned with a ButtonMethod annotation that associates the name of a button with the method.

Overrides:

processMethod in class ControllerHelper

Returns:

The address for the JSP.

doGet

protected void doGet()
              throws javax.servlet.ServletException,
                     java.io.IOException

GET is considered a new request, so the old data is not read and the JSP is always for the edit page.

1. Add the helper to the session but ignore the data from the old helper in the session
2. Always call the default method.
3. Forward the request and response to the next address.

Overrides:

doGet in class ControllerHelper

Throws:

javax.servlet.ServletException

java.io.IOException

doPost

protected void doPost()
               throws javax.servlet.ServletException,
                      java.io.IOException

Call the super class doPost method.

POST is considered a continuation of a previous request, so read the old data from the session and calculate the next page based on the button.

1. Add the helper to the session and copy the old helper data into the current helper. This eliminates the need for hidden fields.
2. Call the appropriate method for the clicked button. This is done from a method in the helper base that loops throuh all the button methods, looking for the one for the clicked button. This eliminates the need for the nested if-else block.
3. Forward the request and response to the next address.

Overrides:

doPost in class ControllerHelper

Throws:

javax.servlet.ServletException

java.io.IOException