Class AddCategoryServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--AddCategoryServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class AddCategoryServlet

extends javax.servlet.http.HttpServlet

This class displays the form, through which the sysad can add new categories and the feature to those categories. Assumptions: It is assumed when the parent category is not a final category. i.e, I should not try to create a category in say RAM. For this we need to check if parent category already contains some product for auction. In that case it won't be final.

See Also:

Serialized Form

Constructor Summary

AddCategoryServlet()

Method Summary

void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) doGet - displays the form with One input box to take new category name.
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) doPost - recieves the data posted from doGet method.
void	init()

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, init, log, log

Methods inherited from class java.lang.Object

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

Constructor Detail

AddCategoryServlet

public AddCategoryServlet()

Method Detail

init

public void init()

Overrides:

init in class javax.servlet.GenericServlet

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  java.io.IOException

doGet - displays the form with

1. One input box to take new category name. It checks (by using query from QueryEngine) whether that category name is not already present in the parent category.
2. Then twenty 20 rows are displayed here to add features of the category to be added an with types of each feature.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

HttpServletRequest - request

HttpServletResponse - response

doPost

public void doPost(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws javax.servlet.ServletException,
                   java.io.IOException

doPost - recieves the data posted from doGet method. And accordingly updates the database by adding the new category to database. Suitable messages are displayed to indicate whether the:

1. Category name was already present.
2. some problem occured during update to database.
3. the update executed successfully.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

HttpServletRequest - request

HttpServletResponse - response