javax.servlet.http
Class HttpServletRequestWrapper

java.lang.Object
  extended by javax.servlet.ServletRequestWrapper
      extended by javax.servlet.http.HttpServletRequestWrapper
All Implemented Interfaces:
HttpServletRequest, ServletRequest

public class HttpServletRequestWrapper
extends ServletRequestWrapper
implements HttpServletRequest

Provides a convenient implementation of the HttpServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet. This class implements the Wrapper or Decorator pattern. Methods default to calling through to the wrapped request object.

Since:
v 2.3
See Also:
HttpServletRequest

Field Summary
 
Fields inherited from interface javax.servlet.http.HttpServletRequest
BASIC_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH, FORM_AUTH
 
Constructor Summary
HttpServletRequestWrapper(HttpServletRequest request)
          Constructs a request object wrapping the given request.
 
Method Summary
 boolean authenticate(HttpServletResponse response)
           
 String getAuthType()
          The default behavior of this method is to return getAuthType() on the wrapped request object.
 String getContextPath()
          The default behavior of this method is to return getContextPath() on the wrapped request object.
 Cookie[] getCookies()
          The default behavior of this method is to return getCookies() on the wrapped request object.
 long getDateHeader(String name)
          The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.
 String getHeader(String name)
          The default behavior of this method is to return getHeader(String name) on the wrapped request object.
 Enumeration<String> getHeaderNames()
          The default behavior of this method is to return getHeaderNames() on the wrapped request object.
 Enumeration<String> getHeaders(String name)
          The default behavior of this method is to return getHeaders(String name) on the wrapped request object.
 int getIntHeader(String name)
          The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.
 String getMethod()
          The default behavior of this method is to return getMethod() on the wrapped request object.
 Part getPart(String name)
          Gets the named Part or null if the Part does not exist.
 Collection<Part> getParts()
          Return a collection of all uploaded Parts.
 String getPathInfo()
          The default behavior of this method is to return getPathInfo() on the wrapped request object.
 String getPathTranslated()
          The default behavior of this method is to return getPathTranslated() on the wrapped request object.
 String getQueryString()
          The default behavior of this method is to return getQueryString() on the wrapped request object.
 String getRemoteUser()
          The default behavior of this method is to return getRemoteUser() on the wrapped request object.
 String getRequestedSessionId()
          The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.
 String getRequestURI()
          The default behavior of this method is to return getRequestURI() on the wrapped request object.
 StringBuffer getRequestURL()
          The default behavior of this method is to return getRequestURL() on the wrapped request object.
 String getServletPath()
          The default behavior of this method is to return getServletPath() on the wrapped request object.
 HttpSession getSession()
          The default behavior of this method is to return getSession() on the wrapped request object.
 HttpSession getSession(boolean create)
          The default behavior of this method is to return getSession(boolean create) on the wrapped request object.
 Principal getUserPrincipal()
          The default behavior of this method is to return getUserPrincipal() on the wrapped request object.
 boolean isRequestedSessionIdFromCookie()
          The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.
 boolean isRequestedSessionIdFromUrl()
          Deprecated. As of Version 3.0 of the Java Servlet API
 boolean isRequestedSessionIdFromURL()
          The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.
 boolean isRequestedSessionIdValid()
          The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.
 boolean isUserInRole(String role)
          The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.
 void login(String username, String password)
           
 void logout()
           
 
Methods inherited from class javax.servlet.ServletRequestWrapper
getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequest, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, isWrapperFor, isWrapperFor, removeAttribute, setAttribute, setCharacterEncoding, setRequest, startAsync, startAsync
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface javax.servlet.ServletRequest
getAsyncContext, getAttribute, getAttributeNames, getCharacterEncoding, getContentLength, getContentType, getDispatcherType, getInputStream, getLocalAddr, getLocale, getLocales, getLocalName, getLocalPort, getParameter, getParameterMap, getParameterNames, getParameterValues, getProtocol, getReader, getRealPath, getRemoteAddr, getRemoteHost, getRemotePort, getRequestDispatcher, getScheme, getServerName, getServerPort, getServletContext, isAsyncStarted, isAsyncSupported, isSecure, removeAttribute, setAttribute, setCharacterEncoding, startAsync, startAsync
 

Constructor Detail

HttpServletRequestWrapper

public HttpServletRequestWrapper(HttpServletRequest request)
Constructs a request object wrapping the given request.

Throws:
IllegalArgumentException - if the request is null
Method Detail

getAuthType

public String getAuthType()
The default behavior of this method is to return getAuthType() on the wrapped request object.

Specified by:
getAuthType in interface HttpServletRequest
Returns:
one of the static members BASIC_AUTH, FORM_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH (suitable for == comparison) or the container-specific string indicating the authentication scheme, or null if the request was not authenticated.

getCookies

public Cookie[] getCookies()
The default behavior of this method is to return getCookies() on the wrapped request object.

Specified by:
getCookies in interface HttpServletRequest
Returns:
an array of all the Cookies included with this request, or null if the request has no cookies

getDateHeader

public long getDateHeader(String name)
The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.

Specified by:
getDateHeader in interface HttpServletRequest
Parameters:
name - a String specifying the name of the header
Returns:
a long value representing the date specified in the header expressed as the number of milliseconds since January 1, 1970 GMT, or -1 if the named header was not included with the request

getHeader

public String getHeader(String name)
The default behavior of this method is to return getHeader(String name) on the wrapped request object.

Specified by:
getHeader in interface HttpServletRequest
Parameters:
name - a String specifying the header name
Returns:
a String containing the value of the requested header, or null if the request does not have a header of that name

getHeaders

public Enumeration<String> getHeaders(String name)
The default behavior of this method is to return getHeaders(String name) on the wrapped request object.

Specified by:
getHeaders in interface HttpServletRequest
Parameters:
name - a String specifying the header name
Returns:
an Enumeration containing the values of the requested header. If the request does not have any headers of that name return an empty enumeration. If the container does not allow access to header information, return null

getHeaderNames

public Enumeration<String> getHeaderNames()
The default behavior of this method is to return getHeaderNames() on the wrapped request object.

Specified by:
getHeaderNames in interface HttpServletRequest
Returns:
an enumeration of all the header names sent with this request; if the request has no headers, an empty enumeration; if the servlet container does not allow servlets to use this method, null

getIntHeader

public int getIntHeader(String name)
The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.

Specified by:
getIntHeader in interface HttpServletRequest
Parameters:
name - a String specifying the name of a request header
Returns:
an integer expressing the value of the request header or -1 if the request doesn't have a header of this name

getMethod

public String getMethod()
The default behavior of this method is to return getMethod() on the wrapped request object.

Specified by:
getMethod in interface HttpServletRequest
Returns:
a String specifying the name of the method with which this request was made

getPathInfo

public String getPathInfo()
The default behavior of this method is to return getPathInfo() on the wrapped request object.

Specified by:
getPathInfo in interface HttpServletRequest
Returns:
a String, decoded by the web container, specifying extra path information that comes after the servlet path but before the query string in the request URL; or null if the URL does not have any extra path information

getPathTranslated

public String getPathTranslated()
The default behavior of this method is to return getPathTranslated() on the wrapped request object.

Specified by:
getPathTranslated in interface HttpServletRequest
Returns:
a String specifying the real path, or null if the URL does not have any extra path information

getContextPath

public String getContextPath()
The default behavior of this method is to return getContextPath() on the wrapped request object.

Specified by:
getContextPath in interface HttpServletRequest
Returns:
a String specifying the portion of the request URI that indicates the context of the request

getQueryString

public String getQueryString()
The default behavior of this method is to return getQueryString() on the wrapped request object.

Specified by:
getQueryString in interface HttpServletRequest
Returns:
a String containing the query string or null if the URL contains no query string. The value is not decoded by the container.

getRemoteUser

public String getRemoteUser()
The default behavior of this method is to return getRemoteUser() on the wrapped request object.

Specified by:
getRemoteUser in interface HttpServletRequest
Returns:
a String specifying the login of the user making this request, or null if the user login is not known

isUserInRole

public boolean isUserInRole(String role)
The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.

Specified by:
isUserInRole in interface HttpServletRequest
Parameters:
role - a String specifying the name of the role
Returns:
a boolean indicating whether the user making this request belongs to a given role; false if the user has not been authenticated

getUserPrincipal

public Principal getUserPrincipal()
The default behavior of this method is to return getUserPrincipal() on the wrapped request object.

Specified by:
getUserPrincipal in interface HttpServletRequest
Returns:
a java.security.Principal containing the name of the user making this request; null if the user has not been authenticated

getRequestedSessionId

public String getRequestedSessionId()
The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.

Specified by:
getRequestedSessionId in interface HttpServletRequest
Returns:
a String specifying the session ID, or null if the request did not specify a session ID
See Also:
HttpServletRequest.isRequestedSessionIdValid()

getRequestURI

public String getRequestURI()
The default behavior of this method is to return getRequestURI() on the wrapped request object.

Specified by:
getRequestURI in interface HttpServletRequest
Returns:
a String containing the part of the URL from the protocol name up to the query string
See Also:
HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)

getRequestURL

public StringBuffer getRequestURL()
The default behavior of this method is to return getRequestURL() on the wrapped request object.

Specified by:
getRequestURL in interface HttpServletRequest
Returns:
a StringBuffer object containing the reconstructed URL

getServletPath

public String getServletPath()
The default behavior of this method is to return getServletPath() on the wrapped request object.

Specified by:
getServletPath in interface HttpServletRequest
Returns:
a String containing the name or path of the servlet being called, as specified in the request URL, decoded, or an empty string if the servlet used to process the request is matched using the "/*" pattern.

getSession

public HttpSession getSession(boolean create)
The default behavior of this method is to return getSession(boolean create) on the wrapped request object.

Specified by:
getSession in interface HttpServletRequest
Parameters:
create - true to create a new session for this request if necessary; false to return null if there's no current session
Returns:
the HttpSession associated with this request or null if create is false and the request has no valid session
See Also:
HttpServletRequest.getSession()

getSession

public HttpSession getSession()
The default behavior of this method is to return getSession() on the wrapped request object.

Specified by:
getSession in interface HttpServletRequest
Returns:
the HttpSession associated with this request
See Also:
HttpServletRequest.getSession(boolean)

isRequestedSessionIdValid

public boolean isRequestedSessionIdValid()
The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.

Specified by:
isRequestedSessionIdValid in interface HttpServletRequest
Returns:
true if this request has an id for a valid session in the current session context; false otherwise
See Also:
HttpServletRequest.getRequestedSessionId(), HttpServletRequest.getSession(boolean), HttpSessionContext

isRequestedSessionIdFromCookie

public boolean isRequestedSessionIdFromCookie()
The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.

Specified by:
isRequestedSessionIdFromCookie in interface HttpServletRequest
Returns:
true if the session ID came in as a cookie; otherwise, false
See Also:
HttpServletRequest.getSession(boolean)

isRequestedSessionIdFromURL

public boolean isRequestedSessionIdFromURL()
The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.

Specified by:
isRequestedSessionIdFromURL in interface HttpServletRequest
Returns:
true if the session ID came in as part of a URL; otherwise, false
See Also:
HttpServletRequest.getSession(boolean)

isRequestedSessionIdFromUrl

public boolean isRequestedSessionIdFromUrl()
Deprecated. As of Version 3.0 of the Java Servlet API

The default behavior of this method is to return isRequestedSessionIdFromUrl() on the wrapped request object.

Specified by:
isRequestedSessionIdFromUrl in interface HttpServletRequest

authenticate

public boolean authenticate(HttpServletResponse response)
                     throws IOException,
                            ServletException
Specified by:
authenticate in interface HttpServletRequest
Returns:
Throws:
IOException
ServletException
Since:
Servlet 3.0 TODO SERVLET3 - Add comments

login

public void login(String username,
                  String password)
           throws ServletException
Specified by:
login in interface HttpServletRequest
Throws:
ServletException - If any of HttpServletRequest.getRemoteUser(), HttpServletRequest.getUserPrincipal() or HttpServletRequest.getAuthType() are non-null, if the configured authenticator does not support user name and password authentication or if the authentication fails
Since:
Servlet 3.0 TODO SERVLET3 - Add comments

logout

public void logout()
            throws ServletException
Specified by:
logout in interface HttpServletRequest
Throws:
ServletException - If the logout fails
Since:
Servlet 3.0 TODO SERVLET3 - Add comments

getParts

public Collection<Part> getParts()
                          throws IllegalStateException,
                                 IOException,
                                 ServletException
Description copied from interface: HttpServletRequest
Return a collection of all uploaded Parts.

Specified by:
getParts in interface HttpServletRequest
Returns:
Throws:
IllegalStateException - if size limits are exceeded
IOException - if an I/O error occurs
ServletException - if the request is not multipart/form-data
Since:
Servlet 3.0 TODO SERVLET3 - Add comments

getPart

public Part getPart(String name)
             throws IllegalStateException,
                    IOException,
                    ServletException
Description copied from interface: HttpServletRequest
Gets the named Part or null if the Part does not exist. Triggers upload of all Parts.

Specified by:
getPart in interface HttpServletRequest
Returns:
Throws:
ServletException
IOException
IllegalStateException
Since:
Servlet 3.0 TODO SERVLET3 - Add comments

(Built by coreservlets)

As of July 2010, there were no online versions of the servlet 3.0, JSP 2.2, and EL 2.2 Javadocs, except as part of the huge Java EE 6 API. So, I built them myself from the Tomcat 7 source code.

Java EE TutorialsJava EE Training