/**
* 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;
}
}
/** Refresh content item when metadata is updated */
@Observer(KiWiEvents.METADATA_UPDATED)
public void listenMetadataUpdate(ContentItem item) {
tripleStore.refresh(item, true);
}