Package org.apache.tapestry5.http.internal.services

Class ResponseImpl

java.lang.Object

org.apache.tapestry5.http.internal.services.ResponseImpl

All Implemented Interfaces:

Response

public class ResponseImpl
extends java.lang.Object
implements Response

Implementation of Response that wraps around an underlying HttpServletResponse.

Constructor Summary

Constructors

Constructor	Description
ResponseImpl(HttpServletRequest request, HttpServletResponse response)

Method Summary

Modifier and Type	Method	Description
void	addHeader(java.lang.String name, java.lang.String value)	Adds a response header with the given name and value, not overwriting any previous values which may have already been added.
void	disableCompression()	Invoked to indicate that the response content is either already compressed, or is not compressable.
java.lang.String	encodeRedirectURL(java.lang.String URL)	Encodes the URL for use as a redirect, ensuring that a session id is included (if a session exists, and as necessary depending on the client browser's use of cookies).
java.lang.String	encodeURL(java.lang.String URL)	Encodes the URL, ensuring that a session id is included (if a session exists, and as necessary depending on the client browser's use of cookies).
java.io.OutputStream	getOutputStream(java.lang.String contentType)	Returns an OutputStream to which byte-oriented output may be sent.
java.io.PrintWriter	getPrintWriter(java.lang.String contentType)	Returns a PrintWriter object to which output may be sent.
boolean	isCommitted()	Returns true if the response has already been sent, either as a redirect or as a stream of content.
void	sendError(int sc, java.lang.String message)	Sends an error response to the client using the specified status.
void	sendRedirect(java.lang.String URL)	Sends a redirect to the client.
void	sendRedirect(Link link)	Sends a redirect to a link.
void	setContentLength(int length)	Sets the length of the content body in the response; this method sets the HTTP Content-Length header.
void	setDateHeader(java.lang.String name, long date)	Sets a response header with the given name and date-value.
void	setHeader(java.lang.String name, java.lang.String value)	Sets a response header with the given name and value.
void	setIntHeader(java.lang.String name, int value)	Sets a response header with the given name and integer value.
void	setStatus(int sc)	Sets the status code for this response.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResponseImpl

public ResponseImpl(HttpServletRequest request,
                    HttpServletResponse response)

Method Detail

getPrintWriter

public java.io.PrintWriter getPrintWriter(java.lang.String contentType)
                                   throws java.io.IOException

Description copied from interface: Response

Returns a PrintWriter object to which output may be sent. Invoking flush() on the writer will commit the output.

Specified by:

getPrintWriter in interface Response

Parameters:

contentType - the MIME content type for the output, typically "text/html"

Throws:

java.io.IOException

encodeURL

public java.lang.String encodeURL(java.lang.String URL)

Description copied from interface: Response

Encodes the URL, ensuring that a session id is included (if a session exists, and as necessary depending on the client browser's use of cookies).

Specified by:

encodeURL in interface Response

Returns:

the same URL or a different one with additional information to track the user session

encodeRedirectURL

public java.lang.String encodeRedirectURL(java.lang.String URL)

Description copied from interface: Response

Encodes the URL for use as a redirect, ensuring that a session id is included (if a session exists, and as necessary depending on the client browser's use of cookies).

Specified by:

encodeRedirectURL in interface Response

Returns:

the same URL or a different one with additional information to track the user session

sendRedirect

public void sendRedirect(java.lang.String URL)
                  throws java.io.IOException

Description copied from interface: Response

Sends a redirect to the client.

Specified by:

sendRedirect in interface Response

Parameters:

URL - full or partial (relative) URL to send to the client

Throws:

java.io.IOException

See Also:

Response.encodeRedirectURL(String)

sendRedirect

public void sendRedirect(Link link)
                  throws java.io.IOException

Description copied from interface: Response

Sends a redirect to a link.

Specified by:

sendRedirect in interface Response

Parameters:

link - link to redirect to.

Throws:

java.io.IOException

setStatus

public void setStatus(int sc)

Description copied from interface: Response

Sets the status code for this response. This method is used to set the return status code when there is no error (for example, for the status codes SC_OK or SC_MOVED_TEMPORARILY). If there is an error, and the caller wishes to invoke an error-page defined in the web applicaion, the sendError method should be used instead.

Specified by:

setStatus in interface Response

Parameters:

sc - the status code

getOutputStream

public java.io.OutputStream getOutputStream(java.lang.String contentType)
                                     throws java.io.IOException

Description copied from interface: Response

Returns an OutputStream to which byte-oriented output may be sent. Invoking flush() on the stream will commit the output.

Specified by:

getOutputStream in interface Response

Parameters:

contentType - the MIME content type for the output, often "application/octet-stream" or "text/plain" or one of several others

Throws:

java.io.IOException

sendError

public void sendError(int sc,
                      java.lang.String message)
               throws java.io.IOException

Description copied from interface: Response

Sends an error response to the client using the specified status. The server defaults to creating the response to look like an HTML-formatted server error page containing the specified message, setting the content type to "text/html", leaving cookies and other headers unmodified. If an error-page declaration has been made for the web application corresponding to the status code passed in, it will be served back in preference to the suggested msg parameter. If the response has already been committed, this method throws an IllegalStateException. After using this method, the response should be considered to be committed and should not be written to.

Specified by:

sendError in interface Response

Parameters:

sc - the error status code

message - the descriptive message

Throws:

java.io.IOException - If an input or output exception occurs

setContentLength

public void setContentLength(int length)

Description copied from interface: Response

Sets the length of the content body in the response; this method sets the HTTP Content-Length header.

Specified by:

setContentLength in interface Response

Parameters:

length - the length of the content

setDateHeader

public void setDateHeader(java.lang.String name,
                          long date)

Description copied from interface: Response

Sets a response header with the given name and date-value. The date is specified in terms of milliseconds since the epoch. If the header had already been set, the new value overwrites the previous one.

Specified by:

setDateHeader in interface Response

Parameters:

name - the name of the header to set

date - the assigned date value

setHeader

public void setHeader(java.lang.String name,
                      java.lang.String value)

Description copied from interface: Response

Sets a response header with the given name and value. If the header had already been set, the new value overwrites the previous one.

Specified by:

setHeader in interface Response

Parameters:

name - the name of the header to set

value - the assigned value

addHeader

public void addHeader(java.lang.String name,
                      java.lang.String value)

Description copied from interface: Response

Adds a response header with the given name and value, not overwriting any previous values which may have already been added.

Specified by:

addHeader in interface Response

Parameters:

name - the name of the header to add

value - the assigned value

setIntHeader

public void setIntHeader(java.lang.String name,
                         int value)

Description copied from interface: Response

Sets a response header with the given name and integer value. If the header had already been set, the new value overwrites the previous one.

Specified by:

setIntHeader in interface Response

Parameters:

name - the name of the header to set

value - the assigned integer value

isCommitted

public boolean isCommitted()

Description copied from interface: Response

Returns true if the response has already been sent, either as a redirect or as a stream of content.

Specified by:

isCommitted in interface Response

Returns:

true if response already sent

disableCompression

public void disableCompression()

Description copied from interface: Response

Invoked to indicate that the response content is either already compressed, or is not compressable.

Specified by:

disableCompression in interface Response