Class DeleteCategoryServlet

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

All Implemented Interfaces:

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

public class DeleteCategoryServlet

extends javax.servlet.http.HttpServlet

This class displays the form. through which the sysad can add delete existing categories . Assumptions: Category is deleted only if it is empty. A category is empty if:

1. It does not contain any sub-categories.
2. Or it does not contain any products placed for auction under it.

See Also:

Serialized Form

Constructor Summary

DeleteCategoryServlet()

Method Summary

void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) doGet - this just calls deleteTheCategory in QueryEngine.
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) This is empty.
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

DeleteCategoryServlet

public DeleteCategoryServlet()

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 - this just calls deleteTheCategory in QueryEngine. The method deleteTheCategory in query engine takes care of whether the category can be deleted or not. If it can be deleted, its deleted.

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

This is empty.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

HttpServletRequest - request

HttpServletResponse - response