RenderResponse (Java Portlet API 1.0 API)

All Superinterfaces:

PortletResponse
```
public interface RenderResponse
extends PortletResponse
```
The RenderResponse defines an object to assist a portlet in sending a response to the portal. It extends the PortletResponse interface to provide specific render response functionality to portlets.
The portlet container creates a RenderResponse object and passes it as argument to the portlet's render method.

See Also:

RenderRequest, PortletResponse

Field Summary

Fields
Modifier and Type Field and Description

static String EXPIRATION_CACHE
Property to set the expiration time in seconds for this response using the setProperty method.

Fields
Modifier and Type	Field and Description
`static String`	`EXPIRATION_CACHE` Property to set the expiration time in seconds for this response using the `setProperty` method.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`PortletURL`	`createActionURL()` Creates a portlet URL targeting the portlet.
`PortletURL`	`createRenderURL()` Creates a portlet URL targeting the portlet.
`void`	`flushBuffer()` Forces any content in the buffer to be written to the client.
`int`	`getBufferSize()` Returns the actual buffer size used for the response.
`String`	`getCharacterEncoding()` Returns the name of the charset used for the MIME body sent in this response.
`String`	`getContentType()` Returns the MIME type that can be used to contribute markup to the render response.
`Locale`	`getLocale()` Returns the locale assigned to the response.
`String`	`getNamespace()` The value returned by this method should be prefixed or appended to elements, such as JavaScript variables or function names, to ensure they are unique in the context of the portal page.
`OutputStream`	`getPortletOutputStream()` Returns a `OutputStream` suitable for writing binary data in the response.
`PrintWriter`	`getWriter()` Returns a PrintWriter object that can send character text to the portal.
`boolean`	`isCommitted()` Returns a boolean indicating if the response has been committed.
`void`	`reset()` Clears any data that exists in the buffer as well as the properties set.
`void`	`resetBuffer()` Clears the content of the underlying buffer in the response without clearing properties set.
`void`	`setBufferSize(int size)` Sets the preferred buffer size for the body of the response.
`void`	`setContentType(String type)` Sets the MIME type for the render response.
`void`	`setTitle(String title)` This method sets the title of the portlet.

Methods inherited from interface javax.portlet.PortletResponse
addProperty, encodeURL, setProperty

- Field Detail
  - EXPIRATION_CACHE
```
static final String EXPIRATION_CACHE
```
    Property to set the expiration time in seconds for this response using the setProperty method.
    If the expiration value is set to 0, caching is disabled for this portlet; if the value is set to -1, the cache does not expire.
    The value is "portlet.expiration-cache".
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getContentType
```
String getContentType()
```
    Returns the MIME type that can be used to contribute markup to the render response.
    If no content type was set previously using the setContentType(java.lang.String) method this method retuns null.
    
    Returns:
    
    the MIME type of the response, or null if no content type is set
    
    See Also:
    
    setContentType(java.lang.String)
  - createRenderURL
```
PortletURL createRenderURL()
```
    Creates a portlet URL targeting the portlet. If no portlet mode, window state or security modifier is set in the PortletURL the current values are preserved. If a request is triggered by the PortletURL, it results in a render request.
    The returned URL can be further extended by adding portlet-specific parameters and portlet modes and window states.
    The created URL will per default not contain any parameters of the current render request.
    
    Returns:
    
    a portlet render URL
  - createActionURL
```
PortletURL createActionURL()
```
    Creates a portlet URL targeting the portlet. If no portlet mode, window state or security modifier is set in the PortletURL the current values are preserved. If a request is triggered by the PortletURL, it results in an action request.
    The returned URL can be further extended by adding portlet-specific parameters and portlet modes and window states.
    The created URL will per default not contain any parameters of the current render request.
    
    Returns:
    
    a portlet action URL
  - getNamespace
```
String getNamespace()
```
    The value returned by this method should be prefixed or appended to elements, such as JavaScript variables or function names, to ensure they are unique in the context of the portal page.
    
    Returns:
    
    the namespace
  - setTitle
```
void setTitle(String title)
```
    This method sets the title of the portlet.
    The value can be a text String
    
    Parameters:
    
    title - portlet title as text String or resource URI
  - setContentType
```
void setContentType(String type)
```
    Sets the MIME type for the render response. The portlet must set the content type before calling getWriter() or getPortletOutputStream().
    Calling setContentType after getWriter or getOutputStream does not change the content type.
    
    Parameters:
    
    type - the content MIME type
    
    Throws:
    
    IllegalArgumentException - if the given type is not in the list returned by PortletRequest.getResponseContentTypes
    
    See Also:
    
    PortletRequest.getResponseContentTypes(), getContentType()
  - getCharacterEncoding
```
String getCharacterEncoding()
```
    Returns the name of the charset used for the MIME body sent in this response.
    See RFC 2047 for more information about character encoding and MIME.
    
    Returns:
    
    a String specifying the name of the charset, for example, ISO-8859-1
  - getWriter
```
PrintWriter getWriter()
               throws IOException
```
    Returns a PrintWriter object that can send character text to the portal.
    Before calling this method the content type of the render response must be set using the setContentType(java.lang.String) method.
    Either this method or getPortletOutputStream() may be called to write the body, not both.
    
    Returns:
    
    a PrintWriter object that can return character data to the portal
    
    Throws:
    
    IOException - if an input or output exception occurred
    
    IllegalStateException - if the getPortletOutputStream method has been called on this response, or if no content type was set using the setContentType method.
    
    See Also:
    
    setContentType(java.lang.String), getPortletOutputStream()
  - getLocale
```
Locale getLocale()
```
    Returns the locale assigned to the response.
    
    Returns:
    
    Locale of this response
  - setBufferSize
```
void setBufferSize(int size)
```
    Sets the preferred buffer size for the body of the response. The portlet container will use a buffer at least as large as the size requested.
    This method must be called before any response body content is written; if content has been written, or the portlet container does not support buffering, this method may throw an IllegalStateException.
    
    Parameters:
    
    size - the preferred buffer size
    
    Throws:
    
    IllegalStateException - if this method is called after content has been written, or the portlet container does not support buffering
    
    See Also:
    
    getBufferSize(), flushBuffer(), isCommitted(), reset()
  - getBufferSize
```
int getBufferSize()
```
    Returns the actual buffer size used for the response. If no buffering is used, this method returns 0.
    
    Returns:
    
    the actual buffer size used
    
    See Also:
    
    setBufferSize(int), flushBuffer(), isCommitted(), reset()
  - flushBuffer
```
void flushBuffer()
          throws IOException
```
    Forces any content in the buffer to be written to the client. A call to this method automatically commits the response.
    
    Throws:
    
    IOException - if an error occured when writing the output
    
    See Also:
    
    setBufferSize(int), getBufferSize(), isCommitted(), reset()
  - resetBuffer
```
void resetBuffer()
```
    Clears the content of the underlying buffer in the response without clearing properties set. If the response has been committed, this method throws an IllegalStateException.
    
    Throws:
    
    IllegalStateException - if this method is called after response is comitted
    
    See Also:
    
    setBufferSize(int), getBufferSize(), isCommitted(), reset()
  - isCommitted
```
boolean isCommitted()
```
    Returns a boolean indicating if the response has been committed.
    
    Returns:
    
    a boolean indicating if the response has been committed
    
    See Also:
    
    setBufferSize(int), getBufferSize(), flushBuffer(), reset()
  - reset
```
void reset()
```
    Clears any data that exists in the buffer as well as the properties set. If the response has been committed, this method throws an IllegalStateException.
    
    Throws:
    
    IllegalStateException - if the response has already been committed
    
    See Also:
    
    setBufferSize(int), getBufferSize(), flushBuffer(), isCommitted()
  - getPortletOutputStream
```
OutputStream getPortletOutputStream()
                             throws IOException
```
    Returns a OutputStream suitable for writing binary data in the response. The portlet container does not encode the binary data.
    Before calling this method the content type of the render response must be set using the setContentType(java.lang.String) method.
    Calling flush() on the OutputStream commits the response.
    Either this method or getWriter() may be called to write the body, not both.
    
    Returns:
    
    a OutputStream for writing binary data
    
    Throws:
    
    IllegalStateException - if the getWriter method has been called on this response, or if no content type was set using the setContentType method.
    
    IOException - if an input or output exception occurred
    
    See Also:
    
    setContentType(java.lang.String), getWriter()

Interface RenderResponse

Field Summary

Method Summary

Methods inherited from interface javax.portlet.PortletResponse

Field Detail

EXPIRATION_CACHE

Method Detail

getContentType

createRenderURL

createActionURL

getNamespace

setTitle

setContentType

getCharacterEncoding

getWriter

getLocale

setBufferSize

getBufferSize

flushBuffer

resetBuffer

isCommitted

reset

getPortletOutputStream