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(Map, WireFeed , HttpServletRequest)` and `buildFeedItems(Map, HttpServletRequest, 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(Map, WireFeed , HttpServletRequest)`, `buildFeedItems(Map, HttpServletRequest, 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 occured during document building
      See Also:
        `Item`