otie
Class Controller

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          otie.Controller

All Implemented Interfaces:

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

public class Controller

extends javax.servlet.http.HttpServlet

See Also:

Serialized Form

Field Summary

private boolean

Final

Fields inherited from class javax.servlet.http.HttpServlet

Fields inherited from class javax.servlet.GenericServlet

Constructor Summary

Controller()

Method Summary

private java.util.ArrayList	addSystemParameters(java.util.ArrayList aList, java.lang.String fileName, java.io.PrintWriter pW) Adds the system parameters into the ArrayList object given as parameter.
void	destroy()
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Process HTTP request.
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
private void	error(java.io.PrintWriter pW)
private void	error(java.io.PrintWriter pW, java.lang.String message)
private Attribute	getAttribute(XMLFile xmlFile, java.lang.String elementName, java.io.PrintWriter printWriter) Create a new attribute representing a given system parameter.
private java.util.ArrayList[]	getAttributes(javax.servlet.http.HttpServletRequest request) A method that maps the request parameters into a more accessible format.
void	init()

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from class java.lang.Object

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

Field Detail

Final

private boolean Final

Constructor Detail

Controller

public Controller()

Method Detail

init

public void init()
          throws javax.servlet.ServletException

Throws:

javax.servlet.ServletException

doGet

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

Process HTTP request.

Parameters:

request - HttpServletRequest The request object.

response - HttpServletResponse The response object.

Throws:

javax.servlet.ServletException - A generic class of exception thrown by a servlet.

java.io.IOException - IO failure with the PrintWriter object.

doPost

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

Throws:

javax.servlet.ServletException

java.io.IOException

getAttributes

private java.util.ArrayList[] getAttributes(javax.servlet.http.HttpServletRequest request)

A method that maps the request parameters into a more accessible format.

Parameters:

request - HttpServletRequest The HTTP request object.

Returns:

ArrayList Returns an ArrayList containing Attribute-objects representing the original HTTP request parameters.

error

private void error(java.io.PrintWriter pW)

error

private void error(java.io.PrintWriter pW,
                   java.lang.String message)

getAttribute

private Attribute getAttribute(XMLFile xmlFile,
                               java.lang.String elementName,
                               java.io.PrintWriter printWriter)

Create a new attribute representing a given system parameter.

Parameters:

xmlFile - XMLFile The XMLFile object representing the system main configuration.

elementName - String The name of the element of which the attribute is to be created.

printWriter - PrintWriter A PrintWriter object for outputting error messages.

Returns:

Attribute Return a new attribute object or null if parameter does not exist in the main configuration file.

addSystemParameters

private java.util.ArrayList addSystemParameters(java.util.ArrayList aList,
                                                java.lang.String fileName,
                                                java.io.PrintWriter pW)

Adds the system parameters into the ArrayList object given as parameter. The system parameters are assume to be in an XML-file that satisfies the format described in the project documentation.

Parameters:

aList - ArrayList The ArrayList object to which the parameters are to be added.

fileName - String The name (and path) of the main configuration file.

pW - PrintWriter A PrintWriter object for outputting error messages, if necessary.

Returns:

ArrayList Returns the original ArrayList in which the system parameters have been added.

destroy

public void destroy()