private KiWiUriResource createFragmentResource(String fragment_id) {
if (fragment_id.startsWith("uri::")) {
return tripleStore.createUriResource(fragment_id.substring("uri::".length()));
}
return null;
}
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);
}
@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;
}
/**
* 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;
}
}
/**
* 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;
}
/* (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;
}
// @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());
}
/** Refresh content item when metadata is updated */
@Observer(KiWiEvents.METADATA_UPDATED)
public void listenMetadataUpdate(ContentItem item) {
tripleStore.refresh(item, true);
}