Ejemplo n.º 1
0
  private KiWiUriResource createFragmentResource(String fragment_id) {
    if (fragment_id.startsWith("uri::")) {
      return tripleStore.createUriResource(fragment_id.substring("uri::".length()));
    }

    return null;
  }
Ejemplo n.º 2
0
  public void writeTo(
      ContentItem st,
      Class<?> type,
      Type genericType,
      Annotation[] annotations,
      MediaType mediaType,
      MultivaluedMap<String, Object> httpHeaders,
      java.io.OutputStream entityStream)
      throws IOException, WebApplicationException {

    TripleStore tripleStore = (TripleStore) Component.getInstance("tripleStore");

    log.info("Titel in Writer" + st.getTitle());

    if (tripleStore == null) {
      log.info("Triplestore not initialized");
    }

    tripleStore.exportData(entityStream, st.getResource(), KiWiDataFormat.RDFXML);
  }
Ejemplo n.º 3
0
  @Override
  public <C extends FragmentFacade> C createFragment(ContentItemI containing_ci, Class<C> type) {

    C ff = kiwiEntityManager.createFacade(contentItemService.createContentItem(), type);
    ff.setContainingContentItem(containing_ci.getDelegate());
    ff.addType(tripleStore.createUriResource(Constants.NS_KIWI_SPECIAL + "Fragment"));

    for (KiWiTriple t : ff.getResource().listOutgoing()) {
      log.debug("triple: #0", t.toString());
    }

    return ff;
  }
Ejemplo n.º 4
0
 /**
  * Query for a single content item using the named query passed as first argument and setting the
  * query parameter "parameter" to the value "value".
  *
  * @param namedQuery the named query to use for querying in the entityManager
  * @param parameter the name of the query parameter to set (e.g. "title", "uri", ...)
  * @param value the value of the query parameter
  * @return the content item returned by the named query, or null
  */
 private ContentItem _getContentItemByQuery(String namedQuery, String parameter, String value) {
   javax.persistence.Query q = entityManager.createNamedQuery(namedQuery);
   q.setParameter(parameter, value);
   q.setMaxResults(1);
   q.setHint("org.hibernate.cacheable", true);
   try {
     ContentItem res = (ContentItem) q.getSingleResult();
     tripleStore.refresh(res, false);
     return res;
   } catch (NoResultException ex) {
     return null;
   }
 }
Ejemplo n.º 5
0
  /**
   * Create a new non-local content item (i.e. with a URI that does not resolve to the current
   * system's base URI.
   *
   * <p>This method does not call persist, the created content item must be persisted manually.
   *
   * @param uri the uri of the external content item to create
   * @return a newly initialised content item that can be used for further operations
   */
  @Insert(ContentItem.class)
  public ContentItem createExternContentItem(String uri) {
    ContentItem result = getContentItemByUri(uri);
    if (result == null) {
      result = tripleStore.createUriResource(uri).getContentItem();
      result.setAuthor(currentUser);

      // TODO: workaround, needs to be fixed properly (KIWI-684)
      //			transactionService.getCurrentTransactionData().setCurrentContentItem(result);

      Events.instance().raiseEvent(KiWiEvents.ACTIVITY_CREATECONTENTITEM, currentUser, result);
      Events.instance().raiseTransactionSuccessEvent(KiWiEvents.ITEM_CREATED, result);
    }
    return result;
  }
Ejemplo n.º 6
0
  /* (non-Javadoc)
   * @see kiwi.api.fragment.FragmentService#createFragment(kiwi.model.content.ContentItemI, java.lang.String, java.lang.Class)
   */
  @Override
  public <C extends FragmentFacade> C createFragment(
      ContentItemI containing_ci, String fragment_id, Class<C> type) {

    KiWiUriResource resource = createFragmentResource(fragment_id);
    // Create the facade
    log.debug("Creating fragment #0", resource.getKiwiIdentifier());
    C ff = kiwiEntityManager.createFacade(resource.getContentItem(), type);
    ff.getDelegate().setDeleted(false);
    ff.setContainingContentItem(containing_ci.getDelegate());
    ff.addType(tripleStore.createUriResource(Constants.NS_KIWI_SPECIAL + "Fragment"));

    for (KiWiTriple t : ff.getResource().listOutgoing()) {
      log.debug("triple: #0", t.toString());
    }

    return ff;
  }
Ejemplo n.º 7
0
  //	@Transactional
  //	@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
  public void importEntry(
      final SyndFeed feed,
      final SyndEntry entry,
      final Set<KiWiUriResource> types,
      final Set<ContentItem> tags,
      User user,
      final Collection<ContentItem> output) {
    if (user == null && entry.getAuthor() != null && !"".equals(entry.getAuthor())) {
      if (userService.userExists(entry.getAuthor())) {
        user = userService.getUserByLogin(entry.getAuthor());
      } else {

        //				user = userService.createUser(entry.getAuthor());
        /* In my opinion, it is not ok to create a user entity
         * without asking the person if he/she wants to be
         * created and persisted in the KiWi dataset.
         * Thus I'm changing the user to 'anonymous',
         * if he/she is'nt registered with the same nick that
         * is given in the rss entry.
         */
        user = userService.getUserByLogin("anonymous");
        kiwiEntityManager.persist(user);
      }
    }

    log.debug("feed entry: #0 (#1)", entry.getTitle(), entry.getUri());

    // create a new content item and copy all data from the feed entry
    ContentItem item;
    if (entry.getLink() != null) {
      item = contentItemService.createExternContentItem(entry.getLink());
    } else if (entry.getUri() != null) {
      try {
        // try parsing URI; if it is not valid,
        URI uri = new URI(entry.getUri());
        item = contentItemService.createExternContentItem(entry.getUri());
      } catch (URISyntaxException e) {
        item = contentItemService.createExternContentItem(feed.getLink() + "#" + entry.getUri());
      }
    } else {
      item = contentItemService.createContentItem();
    }
    contentItemService.updateTitle(item, entry.getTitle());

    if (feed.getLanguage() != null) item.setLanguage(new Locale(feed.getLanguage()));

    if (entry.getPublishedDate() != null) {
      item.setCreated(entry.getPublishedDate());
      item.setModified(entry.getPublishedDate());
    }

    if (entry.getUpdatedDate() != null) {
      if (entry.getPublishedDate() == null) {
        item.setCreated(entry.getUpdatedDate());
      }
      item.setModified(entry.getUpdatedDate());
    }

    item.setAuthor(user);

    // read feed content and set it as item's text content
    List<SyndContent> contents = entry.getContents();
    if (contents.size() == 1) {
      log.debug("using RSS content section provided by item");
      contentItemService.updateTextContentItem(item, "<p>" + contents.get(0).getValue() + "</p>");
    } else if (contents.size() > 1) {
      log.warn("feed entry contained more than one content section");
      contentItemService.updateTextContentItem(item, "<p>" + contents.get(0).getValue() + "</p>");
    } else if (contents.size() == 0) {
      if (entry.getDescription() != null && entry.getDescription().getValue() != null) {
        log.debug("using RSS description as no content section was available");
        contentItemService.updateTextContentItem(
            item, "<p>" + entry.getDescription().getValue() + "</p>");
      }
    }

    // save before tagging
    contentItemService.saveContentItem(item);

    // read feed categories and use them as tags
    for (SyndCategory cat : (List<SyndCategory>) entry.getCategories()) {
      ContentItem _cat;
      if (!taggingService.hasTag(item, cat.getName())) {
        if (cat.getTaxonomyUri() != null) {
          _cat = contentItemService.getContentItemByUri(cat.getTaxonomyUri());
          if (_cat == null) {
            _cat = contentItemService.createExternContentItem(cat.getTaxonomyUri());
            contentItemService.updateTitle(_cat, cat.getName());
            _cat.setAuthor(user);
            contentItemService.saveContentItem(_cat);
          }
          taggingService.createTagging(cat.getName(), item, _cat, user);
        } else {
          _cat = contentItemService.getContentItemByTitle(cat.getName());
          if (_cat == null) {
            _cat = contentItemService.createContentItem();
            contentItemService.updateTitle(_cat, cat.getName());
            _cat.setAuthor(user);
            contentItemService.saveContentItem(_cat);
          }
          taggingService.createTagging(cat.getName(), item, _cat, user);
        }
      }
    }
    // scan for Twitter-style hash tags in title (e.g. #kiwiknows, see KIWI-622)
    Matcher m_hashtag = p_hashtag.matcher(entry.getTitle());
    while (m_hashtag.find()) {
      String tag_label = m_hashtag.group(1);
      if (!taggingService.hasTag(item, tag_label)) {
        ContentItem tag = contentItemService.getContentItemByTitle(tag_label);
        if (tag == null) {
          tag = contentItemService.createContentItem();
          contentItemService.updateTitle(tag, tag_label);
          tag.setAuthor(user);
          contentItemService.saveContentItem(tag);
        }
        taggingService.createTagging(tag_label, item, tag, user);
      }
    }

    // check for geo information
    GeoRSSModule geoRSSModule = GeoRSSUtils.getGeoRSS(entry);
    if (geoRSSModule != null && geoRSSModule.getPosition() != null) {
      POI poi = kiwiEntityManager.createFacade(item, POI.class);
      poi.setLatitude(geoRSSModule.getPosition().getLatitude());
      poi.setLongitude(geoRSSModule.getPosition().getLongitude());
      kiwiEntityManager.persist(poi);
    }

    // check for media information
    MediaEntryModule mediaModule = (MediaEntryModule) entry.getModule(MediaModule.URI);
    if (mediaModule != null) {
      MediaContent[] media = mediaModule.getMediaContents();
      if (media.length > 0) {
        MediaContent m = media[0];
        if (m.getReference() instanceof UrlReference) {
          URL url = ((UrlReference) m.getReference()).getUrl();

          String type = m.getType();
          String name = url.getFile();
          if (name.lastIndexOf("/") > 0) {
            name = name.substring(name.lastIndexOf("/") + 1);
          }

          log.debug("importing media data from URL #0", url.toString());

          try {
            InputStream is = url.openStream();

            ByteArrayOutputStream bout = new ByteArrayOutputStream();

            int c;
            while ((c = is.read()) != -1) {
              bout.write(c);
            }

            byte[] data = bout.toByteArray();

            contentItemService.updateMediaContentItem(item, data, type, name);

            is.close();
            bout.close();
          } catch (IOException ex) {
            log.error("error importing media content from RSS stream");
          }
        } else {
          log.info("RSS importer can only import media with URL references");
        }
      } else {
        log.warn("media module found without content");
      }

      Category[] cats = mediaModule.getMetadata().getCategories();
      for (Category cat : cats) {
        ContentItem _cat;

        String label = cat.getLabel() != null ? cat.getLabel() : cat.getValue();

        if (!taggingService.hasTag(item, label)) {
          if (cat.getScheme() != null) {
            _cat = contentItemService.getContentItemByUri(cat.getScheme() + cat.getValue());
            if (_cat == null) {
              _cat = contentItemService.createExternContentItem(cat.getScheme() + cat.getValue());
              contentItemService.updateTitle(_cat, label);
              _cat.setAuthor(user);
              contentItemService.saveContentItem(_cat);
            }
            taggingService.createTagging(label, item, _cat, user);
          } else {
            _cat = contentItemService.getContentItemByTitle(label);
            if (_cat == null) {
              _cat = contentItemService.createContentItem();
              contentItemService.updateTitle(_cat, label);
              _cat.setAuthor(user);
              contentItemService.saveContentItem(_cat);
            }
            taggingService.createTagging(label, item, _cat, user);
          }
        }
      }
    }

    // add parameter categories as tags
    for (ContentItem tag : tags) {
      if (!taggingService.hasTag(item, tag.getTitle())) {
        taggingService.createTagging(tag.getTitle(), item, tag, user);
      }
    }

    // add parameter types as types
    for (KiWiUriResource type : types) {
      item.addType(type);
    }

    // add kiwi:FeedPost type
    item.addType(tripleStore.createUriResource(Constants.NS_KIWI_CORE + "FeedPost"));

    /* the flush is necessary, because CIs or tags will
     * otherwise be created multiple times when they
     * appear more than once in one RSS feed */
    entityManager.flush();
    log.debug("imported content item '#0' with URI '#1'", item.getTitle(), item.getResource());
  }
Ejemplo n.º 8
0
 /** Refresh content item when metadata is updated */
 @Observer(KiWiEvents.METADATA_UPDATED)
 public void listenMetadataUpdate(ContentItem item) {
   tripleStore.refresh(item, true);
 }