Android Open Source - BBC-News-Reader R S S Manager

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License

The source code is released under:

Copyright (c) 2011, 2012, Digital Lizard (Oscar Key, Thomas Boby) All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the...

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Java Source Code

/*******************************************************************************
 * BBC News Reader/*from   w w  w  .  ja v a 2s .c  om*/
 * Released under the BSD License. See README or LICENSE.
 * Copyright (c) 2011, Digital Lizard (Oscar Key, Thomas Boby)
 * All rights reserved.
 ******************************************************************************/
package com.digitallizard.bbcnewsreader;

import java.util.ArrayList;
import java.util.List;

import org.mcsoxford.rss.RSSException;
import org.mcsoxford.rss.RSSFault;
import org.mcsoxford.rss.RSSFeed;
import org.mcsoxford.rss.RSSItem;
import org.mcsoxford.rss.RSSReader;

public class RSSManager implements Runnable {
  /* constants */
  
  /* variables */
  ResourceInterface resourceInterface;
  Thread thread;
  String[] names;
  String[] urls;
  ArrayList<RSSFeed> feeds;
  RSSReader reader;
  boolean isLoading;
  volatile boolean noError;
  
  synchronized void setIsLoading(boolean keepLoading) {
    this.isLoading = keepLoading;
  }
  
  synchronized boolean isLoading() {
    return isLoading;
  }
  
  public RSSManager(ResourceInterface service) {
    this.resourceInterface = service;
  }
  
  public void load(String[] names, String[] urls) {
    // check we are not already loading
    if (!isLoading()) {
      this.names = names; // store the names
      this.urls = urls; // store the URLS
      feeds = new ArrayList<RSSFeed>();
      thread = new Thread(this);
      setIsLoading(true);
      noError = true;
      thread.start();
    }
  }
  
  public void stopLoading() {
    noError = false;
    setIsLoading(false);
  }
  
  public void run() {
    // create a reader
    reader = new RSSReader();
    // load in the feeds
    for (int i = 0; i < urls.length; i++) {
      // check we haven't been cancelled
      if (isLoading()) {
        RSSFeed feed;
        try {
          feed = reader.load(urls[i]);
          feeds.add(feed);
          List<RSSItem> items = feed.getItems();
          // loop through the items and send them to the parent service
          resourceInterface.categoryRssLoaded(items.toArray(new RSSItem[items.size()]), names[i]);
        } catch (RSSException e) {
          // FIXME not a good way to handle these errors, will be fixed by new RSSManager
          // report the error to the resource service
          resourceInterface.reportError(ReaderActivity.ERROR_TYPE_GENERAL, "The rss feed could not be read.", e.toString());
          // give up loading
          stopLoading();
        } catch (RSSFault e) {
          // FIXME not a good way to handle these errors, will be fixed by new RSSManager
          // report the error to the resource service
          resourceInterface.reportError(ReaderActivity.ERROR_TYPE_INTERNET,
              "The rss feed could not be read. Check your internet connection.", e.toString());
          // give up loading
          stopLoading();
        }
      }
    }
    // report that the load is complete
    resourceInterface.rssLoadComplete(noError);
    setIsLoading(false); // we are not longer loading
  }
}

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