examples.servlets.wrapper
Class MyResponseWrapper

java.lang.Object
  |
  +--javax.servlet.ServletResponseWrapper
        |
        +--javax.servlet.http.HttpServletResponseWrapper
              |
              +--examples.servlets.wrapper.MyResponseWrapper

All Implemented Interfaces:

javax.servlet.http.HttpServletResponse, javax.servlet.ServletResponse

public class MyResponseWrapper

extends javax.servlet.http.HttpServletResponseWrapper

MyResponseWrapper is a class that extends the HttpServletResponseWrapper for to modify the HttpServlet Response. Here, we override the getOutputStream to use our custom substitution output stream

Author:

Copyright (c) 2002 by BEA Systems, Inc. All Rights Reserved.

Field Summary

(package private) boolean

doMyCustomConversion

Fields inherited from interface javax.servlet.http.HttpServletResponse

SC_ACCEPTED, SC_BAD_GATEWAY, SC_BAD_REQUEST, SC_CONFLICT, SC_CONTINUE, SC_CREATED, SC_EXPECTATION_FAILED, SC_FORBIDDEN, SC_GATEWAY_TIMEOUT, SC_GONE, SC_HTTP_VERSION_NOT_SUPPORTED, SC_INTERNAL_SERVER_ERROR, SC_LENGTH_REQUIRED, SC_METHOD_NOT_ALLOWED, SC_MOVED_PERMANENTLY, SC_MOVED_TEMPORARILY, SC_MULTIPLE_CHOICES, SC_NO_CONTENT, SC_NON_AUTHORITATIVE_INFORMATION, SC_NOT_ACCEPTABLE, SC_NOT_FOUND, SC_NOT_IMPLEMENTED, SC_NOT_MODIFIED, SC_OK, SC_PARTIAL_CONTENT, SC_PAYMENT_REQUIRED, SC_PRECONDITION_FAILED, SC_PROXY_AUTHENTICATION_REQUIRED, SC_REQUEST_ENTITY_TOO_LARGE, SC_REQUEST_TIMEOUT, SC_REQUEST_URI_TOO_LONG, SC_REQUESTED_RANGE_NOT_SATISFIABLE, SC_RESET_CONTENT, SC_SEE_OTHER, SC_SERVICE_UNAVAILABLE, SC_SWITCHING_PROTOCOLS, SC_TEMPORARY_REDIRECT, SC_UNAUTHORIZED, SC_UNSUPPORTED_MEDIA_TYPE, SC_USE_PROXY

Constructor Summary

MyResponseWrapper(javax.servlet.ServletResponse sr, java.lang.String ks, java.lang.String rs)

Method Summary

javax.servlet.ServletOutputStream	getOutputStream() Return the custom output stream to the servlet.
java.io.PrintWriter	getWriter() Return the PrintWriter that uses the customOutputStream
void	setContentLength(int i) In this case, we override setContentLength so the container dosen't have to worry about the size of the response.
void	setContentType(java.lang.String t) To make sure that we are just substituting bits that are text, override the setContetType method.

Methods inherited from class javax.servlet.http.HttpServletResponseWrapper

addCookie, addDateHeader, addHeader, addIntHeader, containsHeader, encodeRedirectUrl, encodeRedirectURL, encodeUrl, encodeURL, sendError, sendError, sendRedirect, setDateHeader, setHeader, setIntHeader, setStatus, setStatus

Methods inherited from class javax.servlet.ServletResponseWrapper

flushBuffer, getBufferSize, getCharacterEncoding, getLocale, getResponse, isCommitted, reset, resetBuffer, setBufferSize, setLocale, setResponse

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.servlet.ServletResponse

flushBuffer, getBufferSize, getCharacterEncoding, getLocale, isCommitted, reset, resetBuffer, setBufferSize, setLocale

Field Detail

doMyCustomConversion

boolean doMyCustomConversion

Constructor Detail

MyResponseWrapper

public MyResponseWrapper(javax.servlet.ServletResponse sr,
                         java.lang.String ks,
                         java.lang.String rs)
                  throws java.io.IOException

Method Detail

getOutputStream

public javax.servlet.ServletOutputStream getOutputStream()
                                                  throws java.io.IOException

Return the custom output stream to the servlet.

Overrides:

getOutputStream in class javax.servlet.ServletResponseWrapper

getWriter

public java.io.PrintWriter getWriter()
                              throws java.io.IOException

Return the PrintWriter that uses the customOutputStream

Overrides:

getWriter in class javax.servlet.ServletResponseWrapper

setContentLength

public void setContentLength(int i)

In this case, we override setContentLength so the container dosen't have to worry about the size of the response. This is because we will likely be changing the size of the response. Here the method is a no-op.

Overrides:

setContentLength in class javax.servlet.ServletResponseWrapper

setContentType

public void setContentType(java.lang.String t)

To make sure that we are just substituting bits that are text, override the setContetType method. This sets the boolean doMyCustomConversion so that when getOutputStream and getWriter are called, we can decide whether to use the customOutputStream or not

Overrides:

setContentType in class javax.servlet.ServletResponseWrapper