/**
* addLink
*
* <p>Create a link between two items
*
* <pre>
* Version Date Developer Description
* 0.1 26/04/2012 Genevieve Turner (GT) Initial
* 0.19 27/09/2012 Genevieve Turner (GT) Updated to generate reverse links
* </pre>
*
* @param fedoraObject The item to transform to a display
* @param form Contains the parameters from the request
* @return A response for the web page
* @throws FedoraClientException
*/
@Override
public void addLink(FedoraObject fedoraObject, String linkType, String itemId)
throws FedoraClientException {
String link = GlobalProps.getProperty(GlobalProps.PROP_FEDORA_RELATEDURI);
LinkTypeDAO linkTypeDAO = new LinkTypeDAOImpl();
LinkType linkTypeRecord = linkTypeDAO.getByCode(linkType);
if (null == linkTypeRecord) {
throw new WebApplicationException(
Response.status(400).entity("Invalid relation type").build());
}
FedoraReference reference = new FedoraReference();
String referenceType = linkType;
String referenceItem = itemId;
reference.setPredicate_(link + referenceType);
reference.setObject_(referenceItem);
reference.setIsLiteral_(Boolean.FALSE);
FedoraBroker.addRelationship(fedoraObject.getObject_id(), reference);
if (referenceItem.startsWith("info:fedora/")) {
String referenceItemID = referenceItem.substring(12);
FedoraReference reverseReference = new FedoraReference();
reverseReference.setPredicate_(link + linkTypeRecord.getReverse());
reverseReference.setObject_("info:fedora/" + fedoraObject.getObject_id());
reverseReference.setIsLiteral_(Boolean.FALSE);
FedoraBroker.addRelationship(referenceItemID, reverseReference);
}
}
@PrePersist
protected void onCreate() {
this.timestamp = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(timestamp.getTime());
calendar.add(Calendar.DATE, 30);
this.expiry = calendar.getTime();
this.accessCode = Math.round(Math.random() * (double) Long.MAX_VALUE);
this.accessPassword =
Util.generateRandomString(
Integer.parseInt(GlobalProps.getProperty(GlobalProps.PROP_DROPBOX_PASSWORDLENGTH)));
}
/**
* getLinks
*
* <p>Retrieves the links for a page.
*
* <pre>
* Version Date Developer Description
* 0.3 26/04/2012 Genevieve Turner (GT) Initial
* 0.7 08/06/2012 Genevieve Turner (GT) Updated to cater for change to post method in the riSearchService
* 0.17 28/08/2012 Genevieve Turner (GT) Added the display of reverse links
* 0.19 28/09/2012 Genevieve Turner (GT) Updated so reverse links are not displayed
* 0.21 22/10/2012 Genevieve Turner (GT) Made this method public
* </pre>
*
* @param fedoraObject The object to retrieve the links for
* @return The results of the query
*/
@Override
public List<Result> getLinks(FedoraObject fedoraObject) {
SparqlQuery sparqlQuery = new SparqlQuery();
sparqlQuery.addVar("?item");
sparqlQuery.addVar("?title");
sparqlQuery.addVar("?predicate");
sparqlQuery.addVar("?type");
sparqlQuery.addTriple(
"<info:fedora/" + fedoraObject.getObject_id() + ">", "?predicate", "?item", Boolean.FALSE);
// GT - 20120928 - Note this code is only commented out as it may be placed back in at a later
// date.
/*
StringBuilder tripleString = new StringBuilder();
tripleString.append("{ <info:fedora/");
tripleString.append(fedoraObject.getObject_id());
tripleString.append("> ?predicate ?item . } ");
tripleString.append("UNION ");
tripleString.append("{ ?item ?predicate <info:fedora/");
tripleString.append(fedoraObject.getObject_id());
tripleString.append("> } ");
sparqlQuery.addTripleSet(tripleString.toString());
*/
// Ensure that the linked to item is active (i.e. it hasn't been deleted)
sparqlQuery.addTriple("?item", "<dc:title>", "?title", true);
sparqlQuery.addTriple("?item", "<dc:type>", "?type", true);
sparqlQuery.addTriple("?item", "<fedora-model:state>", "?state", true);
String filterString =
"regex(str(?predicate), '"
+ GlobalProps.getProperty(GlobalProps.PROP_FEDORA_RELATEDURI)
+ "', 'i')";
sparqlQuery.addFilter(filterString, "");
sparqlQuery.addFilter("!BOUND(?state) || regex(str(?state), 'Active')", "&&");
ClientResponse respFromRiSearch = riSearchService.post("query", sparqlQuery.generateQuery());
List<Result> resultList = getSparqlResultList(respFromRiSearch);
LOGGER.debug("Number of related items found: {}", resultList.size());
return resultList;
}
