Examples of de.nava.informa.core.ChannelIF

de.nava.informa.core.ChannelIF
This interface is implemented by objects representing channels in the news channel object model.
@author Niko Schmuck (niko@nava.de)

    }
    
    String option = args[0];
    String data = args[1];
    
    ChannelIF channel = null;
    
    ChannelBuilderIF builder = new de.nava.informa.impl.basic.ChannelBuilder();
    if (option.trim().startsWith("-f")) {
      channel = FeedParser.parse(builder, new File(data));
    } else {
      channel = FeedParser.parse(builder, new URL(data));
    }


    System.out.println("Channel format: " + channel.getFormat().toString());
    System.out.println(channel);
    System.out.println("containing " + channel.getItems().size() + " items");
    Iterator items = channel.getItems().iterator();
    while (items.hasNext()) {
      ItemIF item = (ItemIF) items.next();
      System.out.println("  - " + item);
    }
  }

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        "description", "link", "language", "item", "image", "textinput",
        "copyright", "rating", "docs", "generator", "pubDate", "lastBuildDate",
        "category", "managingEditor", "webMaster", "cloud" });


    // 1 title element
    ChannelIF chnl = cBuilder.createChannel(channel, channel.getChildTextTrim(
        "title", defNS));


    // set channel format
    chnl.setFormat(ChannelFormat.RSS_2_0);


    // 1 description element
    chnl.setDescription(channel.getChildTextTrim("description", defNS));


    // 1 link element
    chnl.setSite(ParserUtils.getURL(channel.getChildTextTrim("link", defNS)));


    // 1 language element
    chnl.setLanguage(channel.getChildTextTrim("language", defNS));


    // 1..n item elements
    List items = channel.getChildren("item", defNS);
    Iterator i = items.iterator();
    while (i.hasNext()) {
      Element item = (Element) i.next();


      ParserUtils.matchCaseOfChildren(item, new String[] { "title", "link",
          "encoded", "description", "subject", "category", "pubDate", "date",
          "author", "creator", "comments", "guid", "source", "enclosure" });


      // get title element
      Element elTitle = item.getChild("title", defNS);
      String strTitle = "<No Title>";
      if (elTitle != null) {
        strTitle = elTitle.getTextTrim();
      }
      if (logger.isDebugEnabled()) {
        logger.debug("Item element found (" + strTitle + ").");
      }


      // get link element
      Element elLink = item.getChild("link", defNS);
      String strLink = "";
      if (elLink != null) {
        strLink = elLink.getTextTrim();
      }


      // get description element
      Element elDesc = item.getChild("encoded", contentNS);
      if (elDesc == null) {
        elDesc = item.getChild("description", defNS);
      }
      String strDesc = "";
      if (elDesc != null) {
        strDesc = elDesc.getTextTrim();
      }


      // generate new RSS item (link to article)
      ItemIF rssItem = cBuilder.createItem(item, chnl, strTitle, strDesc,
          ParserUtils.getURL(strLink));


      // get subject element
      Element elSubject = item.getChild("subject", defNS);
      if (elSubject == null) {
        // fallback mechanism: get dc:subject element
        elSubject = item.getChild("subject", dcNS);
      }
      if (elSubject != null) {
        rssItem.setSubject(elSubject.getTextTrim());
      }


      // get category list
      // get list of <category> elements
      List listCategory = item.getChildren("category", defNS);
      if (listCategory.size() < 1) {
        // fallback mechanism: get dc:category element
        listCategory = item.getChildren("category", dcNS);
      }
      if (listCategory.size() > 0) {
        RecursiveHashtable<String> catTable = new RecursiveHashtable<String>();


        // for each category, parse hierarchy
        Iterator itCat = listCategory.iterator();
        while (itCat.hasNext()) {
          RecursiveHashtable<String> currTable = catTable;
          Element elCategory = (Element) itCat.next();
          // get contents of category element
          String[] titles = elCategory.getTextNormalize().split("/");
          for (int x = 0; x < titles.length; x++) {
            // tokenize category string to extract out hierarchy
            if (currTable.containsKey(titles[x]) == false) {
              // if token does not exist in current map, add it with child Hashtable
              currTable.put(titles[x], new RecursiveHashtable<String>());
            }
            // reset current Hashtable to child's Hashtable then iterate to next token
            currTable = currTable.get(titles[x]);
          }
        }
        ArrayList<CategoryIF> catList = new ArrayList<CategoryIF>();
        // transform cat list & hierarchy into list of CategoryIF elements
        Enumeration<String> enumCategories = catTable.keys();
        while (enumCategories.hasMoreElements()) {
          String key = enumCategories.nextElement();
          // build category list: getCategoryList(parent, title, children)
          CategoryIF cat = getCategoryList(null, key, catTable.get(key));
          catList.add(cat);
        }
        if (catList.size() > 0) {
          // if categories were actually created, then add list to item node
          rssItem.setCategories(catList);
        }
      }


      // get publication date
      Element elDate = item.getChild("pubDate", defNS);
      if (elDate == null) {
        // fallback mechanism: get dc:date element
        elDate = item.getChild("date", dcNS);
      }
      if (elDate != null) {
        rssItem.setDate(ParserUtils.getDate(elDate.getTextTrim()));
      }


      rssItem.setFound(dateParsed);


      // get Author element
      Element elAuthor = item.getChild("author", defNS);
      if (elAuthor == null) {
        // fallback mechanism: get dc:creator element
        elAuthor = item.getChild("creator", dcNS);
      }
      if (elAuthor != null)
        rssItem.setCreator(elAuthor.getTextTrim());


      // get Comments element
      Element elComments = item.getChild("comments", defNS);
      String strComments = "";
      if (elComments != null) {
        strComments = elComments.getTextTrim();
      }
      rssItem.setComments(ParserUtils.getURL(strComments));


      // get guid element
      Element elGuid = item.getChild("guid", defNS);
      if (elGuid != null) {
        String guidUrl = elGuid.getTextTrim();
        if (guidUrl != null) {
          boolean permaLink = true;
          Attribute permaLinkAttribute = elGuid.getAttribute("isPermaLink",
              defNS);
          if (permaLinkAttribute != null) {
            String permaLinkStr = permaLinkAttribute.getValue();
            if (permaLinkStr != null) {
              permaLink = Boolean.valueOf(permaLinkStr).booleanValue();
            }
          }
          ItemGuidIF itemGuid = cBuilder.createItemGuid(rssItem, guidUrl,
              permaLink);
          rssItem.setGuid(itemGuid);
        }
      }


      // get source element
      Element elSource = item.getChild("source", defNS);
      if (elSource != null) {
        String sourceName = elSource.getTextTrim();
        Attribute sourceAttribute = elSource.getAttribute("url", defNS);
        if (sourceAttribute != null) {
          String sourceLocation = sourceAttribute.getValue().trim();
          ItemSourceIF itemSource = cBuilder.createItemSource(rssItem,
              sourceName, sourceLocation, null);
          rssItem.setSource(itemSource);
        }
      }


      // get enclosure element
      Element elEnclosure = item.getChild("enclosure", defNS);
      if (elEnclosure != null) {
        URL location = null;
        String type = null;
        int length = -1;
        Attribute urlAttribute = elEnclosure.getAttribute("url", defNS);
        if (urlAttribute != null) {
          location = ParserUtils.getURL(urlAttribute.getValue().trim());
        }
        Attribute typeAttribute = elEnclosure.getAttribute("type", defNS);
        if (typeAttribute != null) {
          type = typeAttribute.getValue().trim();
        }
        Attribute lengthAttribute = elEnclosure.getAttribute("length", defNS);
        if (lengthAttribute != null) {
          try {
            length = Integer.parseInt(lengthAttribute.getValue().trim());
          } catch (NumberFormatException e) {
            logger.warn(e);
          }
        }
        ItemEnclosureIF itemEnclosure = cBuilder.createItemEnclosure(rssItem,
            location, type, length);
        rssItem.setEnclosure(itemEnclosure);
      }
    }


    // 0..1 image element
    Element image = channel.getChild("image", defNS);
    if (image != null) {


      ParserUtils.matchCaseOfChildren(image, new String[] { "title", "url",
          "link", "width", "height", "description" });


      ImageIF rssImage = cBuilder.createImage(image.getChildTextTrim("title",
          defNS), ParserUtils.getURL(image.getChildTextTrim("url", defNS)),
          ParserUtils.getURL(image.getChildTextTrim("link", defNS)));
      Element imgWidth = image.getChild("width", defNS);
      if (imgWidth != null) {
        try {
          rssImage.setWidth(Integer.parseInt(imgWidth.getTextTrim()));
        } catch (NumberFormatException e) {
          logger.warn("Error parsing width: " + e.getMessage());
        }
      }
      Element imgHeight = image.getChild("height", defNS);
      if (imgHeight != null) {
        try {
          rssImage.setHeight(Integer.parseInt(imgHeight.getTextTrim()));
        } catch (NumberFormatException e) {
          logger.warn("Error parsing height: " + e.getMessage());
        }
      }
      Element imgDescr = image.getChild("description", defNS);
      if (imgDescr != null) {
        rssImage.setDescription(imgDescr.getTextTrim());
      }
      chnl.setImage(rssImage);
    }


    // 0..1 textinput element
    Element txtinp = channel.getChild("textinput", defNS);
    if (txtinp != null) {


      ParserUtils.matchCaseOfChildren(txtinp, new String[] { "title",
          "description", "name", "link" });


      TextInputIF rssTextInput = cBuilder.createTextInput(txtinp
          .getChildTextTrim("title", defNS), txtinp.getChildTextTrim(
          "description", defNS), txtinp.getChildTextTrim("name", defNS),
          ParserUtils.getURL(txtinp.getChildTextTrim("link", defNS)));
      chnl.setTextInput(rssTextInput);
    }


    // 0..1 copyright element
    Element copyright = channel.getChild("copyright", defNS);
    if (copyright != null) {
      chnl.setCopyright(copyright.getTextTrim());
    }


    // 0..1 Rating element
    Element rating = channel.getChild("rating", defNS);
    if (rating != null) {
      chnl.setRating(rating.getTextTrim());
    }


    // 0..1 Docs element
    Element docs = channel.getChild("docs", defNS);
    if (docs != null) {
      chnl.setDocs(docs.getTextTrim());
    }


    // 0..1 Generator element
    Element generator = channel.getChild("generator", defNS);
    if (generator != null) {
      chnl.setGenerator(generator.getTextTrim());
    }


    // 0..1 ttl element
    Element ttl = channel.getChild("ttl", defNS);
    if (ttl != null) {
      String ttlValue = ttl.getTextTrim();
      try {
        chnl.setTtl(Integer.parseInt(ttlValue));
      } catch (NumberFormatException e) {
        logger.warn("Invalid TTL format: '" + ttlValue + "'");
      }
    }


    // 0..1 pubDate element
    Element pubDate = channel.getChild("pubDate", defNS);
    if (pubDate != null) {
      chnl.setPubDate(ParserUtils.getDate(pubDate.getTextTrim()));
    }


    // 0..1 lastBuildDate element
    Element lastBuildDate = channel.getChild("lastBuildDate", defNS);
    if (lastBuildDate != null) {
      chnl.setLastBuildDate(ParserUtils.getDate(lastBuildDate.getTextTrim()));
    }


    // get category list
    // get list of <category> elements
    List listCategory = channel.getChildren("category", defNS);
    if (listCategory.size() < 1) {
      // fallback mechanism: get dc:category element
      listCategory = channel.getChildren("category", dcNS);
    }
    if (listCategory.size() > 0) {
      RecursiveHashtable<String> catTable = new RecursiveHashtable<String>();
      // for each category, parse hierarchy
      Iterator itCat = listCategory.iterator();
      while (itCat.hasNext()) {
        RecursiveHashtable<String> currTable = catTable;
        Element elCategory = (Element) itCat.next();
        // get contents of category element
        String[] titles = elCategory.getTextNormalize().split("/");
        for (int x = 0; x < titles.length; x++) {
          // tokenize category string to extract out hierarchy
          if (currTable.containsKey(titles[x]) == false) {
            // if token does not exist in current map, add it with child Hashtable
            currTable.put(titles[x], new RecursiveHashtable<String>());
          }
          // reset current Hashtable to child's Hashtable then iterate to next token
          currTable = currTable.get(titles[x]);
        }
      }
      ArrayList<CategoryIF> catList = new ArrayList<CategoryIF>();
      // transform cat list & hierarchy into list of CategoryIF elements
      Enumeration<String> enumCategories = catTable.keys();
      while (enumCategories.hasMoreElements()) {
        String key = enumCategories.nextElement();
        // build category list: getCategoryList(parent, title, children)
        CategoryIF cat = getCategoryList(null, key, catTable.get(key));
        catList.add(cat);
      }
      if (catList.size() > 0) {
        // if categories were actually created, then add list to item node
        chnl.setCategories(catList);
      }
    }


    // 0..1 managingEditor element
    Element managingEditor = channel.getChild("managingEditor", defNS);
    if (managingEditor != null) {
      chnl.setCreator(managingEditor.getTextTrim());
    }


    // 0..1 webMaster element
    Element webMaster = channel.getChild("webMaster", defNS);
    if (webMaster != null) {
      chnl.setPublisher(webMaster.getTextTrim());
    }


    // 0..1 cloud element
    Element cloud = channel.getChild("cloud", defNS);
    if (cloud != null) {
      String _port = cloud.getAttributeValue("port", defNS);
      int port = -1;
      if (_port != null) {
        try {
          port = Integer.parseInt(_port);
        } catch (NumberFormatException e) {
          logger.warn(e);
        }
      }
      chnl.setCloud(cBuilder.createCloud(cloud.getAttributeValue("domain",
          defNS), port, cloud.getAttributeValue("path", defNS), cloud
          .getAttributeValue("registerProcedure", defNS), cloud
          .getAttributeValue("protocol", defNS)));
    }


    chnl.setLastUpdated(dateParsed);


    // 0..1 skipHours element
    // 0..1 skipDays element


    return chnl;

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      channels = (ChannelIF[]) timers.keySet().toArray(new ChannelIF[0]);
    }


    // Reschedule all registered channels.
    for (int i = 0; i < channels.length; i++) {
      final ChannelIF channel = channels[i];
      rescheduleChannel(channel, period);
    }
  }

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   *
   * @param record record.
   * @param period period.
   */
  private void resched(ChannelRecord record, long period) {
    ChannelIF channel = record.getChannel();


    // remove existing task
    unschedule(channel);


    // schedule new task

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   * @param period period in millis.
   */
  private void sched(ChannelRecord record, long delay, long period) {
    record.setCanceled(false);


    ChannelIF channel = record.getChannel();
    SchedulerTask tt = new SchedulerTask(record);


    synchronized (timers) {
      timers.put(channel, tt);
    }

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   *
   * @param item item to delete.
   */
  public final void deleteItem(ItemIF item) {
    if (item instanceof Item) {
      final ChannelIF parent = ((Item) item).getParent();
      parent.removeItem(item);
    }


    items.remove(new Long(item.getId()));
    item.setId(-1);
  }

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   * @param dest destination group to put channel into.
   */
  final void moveChannels(ChannelGroupIF src, ChannelGroupIF dest) {
    final ChannelIF[] secondChannels = (ChannelIF[]) src.getAll().toArray(new ChannelIF[0]);
    for (int i = 0; i < secondChannels.length; i++) {
      ChannelIF channel = secondChannels[i];


      addChannelToGroup(channel, dest);
      removeChannelFromGroup(channel, src);
    }
  }

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   */
  public ChannelIF createChannel(String title, URL location)
    throws PersistenceManagerException {


    // Create channel object and perform some initialization and save
    final ChannelIF channel = new Channel(title);
    channel.setLocation(location);
    HibernateUtil.saveObject(channel);


    return channel;
  }

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    group.getChildren().size();


    // Load the lists of channels and items in all channels
    ChannelIF[] channels = (ChannelIF[]) group.getAll().toArray(new ChannelIF[0]);
    for (int i = 0; i < channels.length; i++) {
      ChannelIF channel = channels[i];
      channel.getCategories().size();
      ((Channel)channel).getGroups().size();
      for (Iterator it = channel.getItems().iterator(); it.hasNext();) {
        ((ItemIF)it.next()).getCategories().size();
      }
    }
  }

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   */
  private static void deleteItem(ItemIF item, Session session)
    throws PersistenceManagerException {


    // Find the channel and remove item from it
    final ChannelIF channel = item.getChannel();
    if (channel != null) {
      HibernateUtil.lock(channel, session);
      channel.removeItem(item);
    } else {
      LOG.severe("Item didn't belong to any channel: " + item);
    }


    // Delete item

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de.nava.informa.exporters.TestRSS_0_91_Exporter

de.nava.informa.exporters.TestRSS_1_0_Exporter

de.nava.informa.impl.basic.Channel

de.nava.informa.impl.basic.ChannelGroup

de.nava.informa.impl.basic.TestChannelBuilder

de.nava.informa.impl.basic.TestItemOrder

de.nava.informa.impl.hibernate.Channel

de.nava.informa.impl.hibernate.ChannelBuilder

de.nava.informa.impl.hibernate.ChannelGroup

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