Package javax.servlet.http

Class HttpServletResponseWrapper

java.lang.Object

javax.servlet.ServletResponseWrapper

javax.servlet.http.HttpServletResponseWrapper

All Implemented Interfaces:

HttpServletResponse, ServletResponse

public class HttpServletResponseWrapper
extends ServletResponseWrapper
implements HttpServletResponse

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

Since:

Servlet 2.3

See Also:

• HttpServletResponse

Field Summary

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_FOUND, 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

Constructors

Constructor	Description
HttpServletResponseWrapper(HttpServletResponse response)	Constructs a response adaptor wrapping the given response.

Method Summary

Modifier and Type	Method	Description
void	addCookie(Cookie cookie)	The default behavior of this method is to call addCookie(Cookie cookie) on the wrapped response object.
void	addDateHeader(String name, long date)	The default behavior of this method is to call addDateHeader(String name, long date) on the wrapped response object.
void	addHeader(String name, String value)	The default behavior of this method is to return addHeader(String name, String value) on the wrapped response object.
void	addIntHeader(String name, int value)	The default behavior of this method is to call addIntHeader(String name, int value) on the wrapped response object.
boolean	containsHeader(String name)	The default behavior of this method is to call containsHeader(String name) on the wrapped response object.
String	encodeRedirectUrl(String url)	Deprecated. As of Version 3.0 of the Java Servlet API
String	encodeRedirectURL(String url)	The default behavior of this method is to return encodeRedirectURL(String url) on the wrapped response object.
String	encodeUrl(String url)	Deprecated. As of Version 3.0 of the Java Servlet API
String	encodeURL(String url)	The default behavior of this method is to call encodeURL(String url) on the wrapped response object.
String	getHeader(String name)	Return the value for the specified header, or null if this header has not been set.
Collection<String>	getHeaderNames()	Get the header names set for this HTTP response.
Collection<String>	getHeaders(String name)	Return a Collection of all the header values associated with the specified header name.
int	getStatus()	Get the HTTP status code for this Response.
Supplier<Map<String,String>>	getTrailerFields()	Obtain the supplier of the trailer headers.
void	sendError(int sc)	The default behavior of this method is to call sendError(int sc) on the wrapped response object.
void	sendError(int sc, String msg)	The default behavior of this method is to call sendError(int sc, String msg) on the wrapped response object.
void	sendRedirect(String location)	The default behavior of this method is to call sendRedirect(String location) on the wrapped response object.
void	setDateHeader(String name, long date)	The default behavior of this method is to call setDateHeader(String name, long date) on the wrapped response object.
void	setHeader(String name, String value)	The default behavior of this method is to return setHeader(String name, String value) on the wrapped response object.
void	setIntHeader(String name, int value)	The default behavior of this method is to call setIntHeader(String name, int value) on the wrapped response object.
void	setStatus(int sc)	The default behavior of this method is to call setStatus(int sc) on the wrapped response object.
void	setStatus(int sc, String sm)	Deprecated. As of Version 3.0 of the Java Servlet API
void	setTrailerFields(Supplier<Map<String,String>> supplier)	Configure the supplier of the trailer headers.

Methods inherited from class javax.servlet.ServletResponseWrapper

flushBuffer, getBufferSize, getCharacterEncoding, getContentType, getLocale, getOutputStream, getResponse, getWriter, isCommitted, isWrapperFor, isWrapperFor, reset, resetBuffer, setBufferSize, setCharacterEncoding, setContentLength, setContentLengthLong, setContentType, 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, getContentType, getLocale, getOutputStream, getWriter, isCommitted, reset, resetBuffer, setBufferSize, setCharacterEncoding, setContentLength, setContentLengthLong, setContentType, setLocale

Constructor Details

HttpServletResponseWrapper

public HttpServletResponseWrapper(HttpServletResponse response)

Constructs a response adaptor wrapping the given response.

Parameters:

response - The response to be wrapped

Throws:

IllegalArgumentException - if the response is null

Method Details

addCookie

public void addCookie(Cookie cookie)

The default behavior of this method is to call addCookie(Cookie cookie) on the wrapped response object.

Specified by:

addCookie in interface HttpServletResponse

Parameters:

cookie - the Cookie to return to the client

containsHeader

public boolean containsHeader(String name)

The default behavior of this method is to call containsHeader(String name) on the wrapped response object.

Specified by:

containsHeader in interface HttpServletResponse

Parameters:

name - the header name

Returns:

true if the named response header has already been set; false otherwise

encodeURL

public String encodeURL(String url)

The default behavior of this method is to call encodeURL(String url) on the wrapped response object.

Specified by:

encodeURL in interface HttpServletResponse

Parameters:

url - the url to be encoded.

Returns:

the encoded URL if encoding is needed; the unchanged URL otherwise.

encodeRedirectURL

public String encodeRedirectURL(String url)

The default behavior of this method is to return encodeRedirectURL(String url) on the wrapped response object.

Specified by:

encodeRedirectURL in interface HttpServletResponse

Parameters:

url - the url to be encoded.

Returns:

the encoded URL if encoding is needed; the unchanged URL otherwise.

See Also:

• HttpServletResponse.sendRedirect(java.lang.String)
• HttpServletResponse.encodeUrl(java.lang.String)

encodeUrl

@Deprecated
public String encodeUrl(String url)

Deprecated.

As of Version 3.0 of the Java Servlet API

The default behavior of this method is to call encodeUrl(String url) on the wrapped response object.

Specified by:

encodeUrl in interface HttpServletResponse

Parameters:

url - the url to be encoded.

Returns:

the encoded URL if encoding is needed; the unchanged URL otherwise.

encodeRedirectUrl

@Deprecated
public String encodeRedirectUrl(String url)

Deprecated.

As of Version 3.0 of the Java Servlet API

The default behavior of this method is to return encodeRedirectUrl(String url) on the wrapped response object.

Specified by:

encodeRedirectUrl in interface HttpServletResponse

Parameters:

url - the url to be encoded.

Returns:

the encoded URL if encoding is needed; the unchanged URL otherwise.

sendError

public void sendError(int sc,
 String msg)
               throws IOException

The default behavior of this method is to call sendError(int sc, String msg) on the wrapped response object.

Specified by:

sendError in interface HttpServletResponse

Parameters:

sc - the error status code

msg - the descriptive message

Throws:

IOException - If an input or output exception occurs

sendError

public void sendError(int sc)
               throws IOException

The default behavior of this method is to call sendError(int sc) on the wrapped response object.

Specified by:

sendError in interface HttpServletResponse

Parameters:

sc - the error status code

Throws:

IOException - If an input or output exception occurs

sendRedirect

public void sendRedirect(String location)
                  throws IOException

The default behavior of this method is to call sendRedirect(String location) on the wrapped response object.

Specified by:

sendRedirect in interface HttpServletResponse

Parameters:

location - the redirect location URL (may be absolute or relative)

Throws:

IOException - If an input or output exception occurs

setDateHeader

public void setDateHeader(String name,
 long date)

The default behavior of this method is to call setDateHeader(String name, long date) on the wrapped response object.

Specified by:

setDateHeader in interface HttpServletResponse

Parameters:

name - the name of the header to set

date - the assigned date value

See Also:

• HttpServletResponse.containsHeader(java.lang.String)
• HttpServletResponse.addDateHeader(java.lang.String, long)

addDateHeader

public void addDateHeader(String name,
 long date)

The default behavior of this method is to call addDateHeader(String name, long date) on the wrapped response object.

Specified by:

addDateHeader in interface HttpServletResponse

Parameters:

name - the name of the header to set

date - the additional date value

See Also:

• HttpServletResponse.setDateHeader(java.lang.String, long)

setHeader

public void setHeader(String name,
 String value)

The default behavior of this method is to return setHeader(String name, String value) on the wrapped response object.

Specified by:

setHeader in interface HttpServletResponse

Parameters:

name - the name of the header

value - the header value If it contains octet string, it should be encoded according to RFC 2047 (http://www.ietf.org/rfc/rfc2047.txt)

See Also:

• HttpServletResponse.containsHeader(java.lang.String)
• HttpServletResponse.addHeader(java.lang.String, java.lang.String)

addHeader

public void addHeader(String name,
 String value)

The default behavior of this method is to return addHeader(String name, String value) on the wrapped response object.

Specified by:

addHeader in interface HttpServletResponse

Parameters:

name - the name of the header

value - the additional header value If it contains octet string, it should be encoded according to RFC 2047 (http://www.ietf.org/rfc/rfc2047.txt)

See Also:

• HttpServletResponse.setHeader(java.lang.String, java.lang.String)

setIntHeader

public void setIntHeader(String name,
 int value)

The default behavior of this method is to call setIntHeader(String name, int value) on the wrapped response object.

Specified by:

setIntHeader in interface HttpServletResponse

Parameters:

name - the name of the header

value - the assigned integer value

See Also:

• HttpServletResponse.containsHeader(java.lang.String)
• HttpServletResponse.addIntHeader(java.lang.String, int)

addIntHeader

public void addIntHeader(String name,
 int value)

The default behavior of this method is to call addIntHeader(String name, int value) on the wrapped response object.

Specified by:

addIntHeader in interface HttpServletResponse

Parameters:

name - the name of the header

value - the assigned integer value

See Also:

• HttpServletResponse.setIntHeader(java.lang.String, int)

setStatus

public void setStatus(int sc)

The default behavior of this method is to call setStatus(int sc) on the wrapped response object.

Specified by:

setStatus in interface HttpServletResponse

Parameters:

sc - the status code

See Also:

• HttpServletResponse.sendError(int, java.lang.String)

setStatus

@Deprecated
public void setStatus(int sc,
 String sm)

Deprecated.

As of Version 3.0 of the Java Servlet API

The default behavior of this method is to call setStatus(int sc, String sm) on the wrapped response object.

Specified by:

setStatus in interface HttpServletResponse

Parameters:

sc - the status code

sm - the status message

getStatus

public int getStatus()

Get the HTTP status code for this Response.

The default implementation is to call HttpServletResponse.getStatus() on the wrapped HttpServletResponse.

Specified by:

getStatus in interface HttpServletResponse

Returns:

The HTTP status code for this Response

Since:

Servlet 3.0

getHeader

public String getHeader(String name)

Return the value for the specified header, or null if this header has not been set. If more than one value was added for this name, only the first is returned; use HttpServletResponse.getHeaders(String) to retrieve all of them.

The default implementation is to call HttpServletResponse.getHeader(String) on the wrapped HttpServletResponse.

Specified by:

getHeader in interface HttpServletResponse

Parameters:

name - Header name to look up

Returns:

The first value for the specified header. This is the raw value so if multiple values are specified in the first header then they will be returned as a single header value .

Since:

Servlet 3.0

getHeaders

public Collection<String> getHeaders(String name)

Return a Collection of all the header values associated with the specified header name.

The default implementation is to call HttpServletResponse.getHeaders(String) on the wrapped HttpServletResponse.

Specified by:

getHeaders in interface HttpServletResponse

Parameters:

name - Header name to look up

Returns:

The values for the specified header. These are the raw values so if multiple values are specified in a single header that will be returned as a single header value.

Since:

Servlet 3.0

getHeaderNames

public Collection<String> getHeaderNames()

Get the header names set for this HTTP response.

The default implementation is to call HttpServletResponse.getHeaderNames() on the wrapped HttpServletResponse.

Specified by:

getHeaderNames in interface HttpServletResponse

Returns:

The header names set for this HTTP response.

Since:

Servlet 3.0

setTrailerFields

public void setTrailerFields(Supplier<Map<String,String>> supplier)

Configure the supplier of the trailer headers. The supplier will be called in the scope of the thread that completes the response.
Trailers that don't meet the requirements of RFC 7230, section 4.1.2 will be ignored.
The default implementation is a NO-OP.

The default implementation is to call HttpServletResponse.setTrailerFields(Supplier) on the wrapped HttpServletResponse.

Specified by:

setTrailerFields in interface HttpServletResponse

Parameters:

supplier - The supplier for the trailer headers

Since:

Servlet 4.0

getTrailerFields

public Supplier<Map<String,String>> getTrailerFields()

Obtain the supplier of the trailer headers.
The default implementation returns null.

The default implementation is to call HttpServletResponse.getTrailerFields() on the wrapped HttpServletResponse.

Specified by:

getTrailerFields in interface HttpServletResponse

Returns:

The supplier for the trailer headers

Since:

Servlet 4.0