org.springframework.web.servlet.view.feed

Class AbstractRssFeedView

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.context.support.WebApplicationObjectSupport

org.springframework.web.servlet.view.AbstractView

org.springframework.web.servlet.view.feed.AbstractFeedView<com.sun.syndication.feed.rss.Channel>

org.springframework.web.servlet.view.feed.AbstractRssFeedView

All Implemented Interfaces:

Aware, BeanNameAware, ApplicationContextAware, ServletContextAware, View

public abstract class AbstractRssFeedView
extends AbstractFeedView<com.sun.syndication.feed.rss.Channel>

Abstract superclass for RSS Feed views, using java.net's ROME package.

Application-specific view classes will extend this class. The view will be held in the subclass itself, not in a template. Main entry points are the AbstractFeedView.buildFeedMetadata(java.util.Map<java.lang.String, java.lang.Object>, T, javax.servlet.http.HttpServletRequest) and buildFeedItems(java.util.Map<java.lang.String, java.lang.Object>, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse).

Thanks to Jettro Coenradie and Sergio Bossa for the original feed view prototype!

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller

See Also:

AbstractFeedView.buildFeedMetadata(java.util.Map<java.lang.String, java.lang.Object>, T, javax.servlet.http.HttpServletRequest), buildFeedItems(java.util.Map<java.lang.String, java.lang.Object>, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

Field Summary

Fields inherited from class org.springframework.web.servlet.view.AbstractView

DEFAULT_CONTENT_TYPE

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Fields inherited from interface org.springframework.web.servlet.View

PATH_VARIABLES, RESPONSE_STATUS_ATTRIBUTE, SELECTED_CONTENT_TYPE

Constructor Summary

Constructors

Constructor and Description
AbstractRssFeedView()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	buildFeedEntries(Map<String,Object> model, com.sun.syndication.feed.rss.Channel channel, HttpServletRequest request, HttpServletResponse response) Invokes buildFeedItems(Map, HttpServletRequest, HttpServletResponse) to get a list of feed items.
protected abstract List<com.sun.syndication.feed.rss.Item>	buildFeedItems(Map<String,Object> model, HttpServletRequest request, HttpServletResponse response) Subclasses must implement this method to build feed items, given the model.
protected com.sun.syndication.feed.rss.Channel	newFeed() Create a new Channel instance to hold the entries.

Methods inherited from class org.springframework.web.servlet.view.feed.AbstractFeedView

buildFeedMetadata, renderMergedOutputModel

Methods inherited from class org.springframework.web.servlet.view.AbstractView

addStaticAttribute, createMergedOutputModel, createRequestContext, createTemporaryOutputStream, exposeModelAsRequestAttributes, generatesDownloadContent, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, isExposePathVariables, prepareResponse, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setExposePathVariables, setRequestContextAttribute, setResponseContentType, toString, writeToResponse

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractRssFeedView

public AbstractRssFeedView()

Method Detail

newFeed

protected com.sun.syndication.feed.rss.Channel newFeed()

Create a new Channel instance to hold the entries.

By default returns an RSS 2.0 channel, but the subclass can specify any channel.

Specified by:

newFeed in class AbstractFeedView<com.sun.syndication.feed.rss.Channel>

Returns:

the newly created Feed instance

buildFeedEntries

protected final void buildFeedEntries(Map<String,Object> model,
                    com.sun.syndication.feed.rss.Channel channel,
                    HttpServletRequest request,
                    HttpServletResponse response)
                               throws Exception

Invokes buildFeedItems(Map, HttpServletRequest, HttpServletResponse) to get a list of feed items.

Specified by:

buildFeedEntries in class AbstractFeedView<com.sun.syndication.feed.rss.Channel>

Parameters:

model - the model Map

channel - the feed to add entries to

request - in case we need locale etc. Shouldn't look at attributes.

response - in case we need to set cookies. Shouldn't write to it.

Throws:

Exception - any exception that occured during building

buildFeedItems

protected abstract List<com.sun.syndication.feed.rss.Item> buildFeedItems(Map<String,Object> model,
                                                     HttpServletRequest request,
                                                     HttpServletResponse response)
                                                                   throws Exception

Subclasses must implement this method to build feed items, given the model.

Note that the passed-in HTTP response is just supposed to be used for setting cookies or other HTTP headers. The built feed itself will automatically get written to the response after this method returns.

Parameters:

model - the model Map

request - in case we need locale etc. Shouldn't look at attributes.

response - in case we need to set cookies. Shouldn't write to it.

Returns:

the feed items to be added to the feed

Throws:

Exception - any exception that occurred during document building

See Also:

Item