Hi
I'm trying to inject the ContentHub constraint fields into the content's
metadata graph e.g. the "title" Solr field becomes a dc:title etc.
The code is as from the sample below. I get the metadata graph, acquire
the lock, add the triple. If I check within that method whether it was
added, i.e. with
ci.getMetadata().filter(null,DC.title,null)
I can find the triple. But as I leave the method and I check the content
metadata again, I cannot find these changes. The metadata graph seems
unaltered.
Given that the metadata graph seems to be a nonvolatile member of
ContentItemImpl, I'm wondering why my changes are not being reflected.
Does anyone have a clue?
Thanks
Alessandro
/*------- BEGIN code sample ---------*/
// All content items
SolrDocumentList docs = searchUtility.search("*:*").getResults();
for (SolrDocument doc : docs) {
String id = (String) doc.getFieldValue(SolrFieldName.ID.toString());
ContentItem ci = contentStore.get(id);
String title = (String)
doc.getFieldValue(SolrFieldName.TITLE.toString());
LockableMGraph mg = ci.getMetadata();
// Acquire the lock and add the triple
Lock writeLock = mg.getLock().writeLock();
Triple t = new TripleImpl(ci.getUri(), DC.title,
ClerezzaBackendStatic.createLiteral(title, Locale.getDefault(),
null));
writeLock.lock();
mg.add(t);
writeLock.unlock();
}
/*------- END code sample ---------*/
--
M.Sc. Alessandro Adamou
Alma Mater Studiorum - Università di Bologna
Department of Computer Science
Mura Anteo Zamboni 7, 40127 Bologna - Italy
Semantic Technology Laboratory (STLab)
Institute for Cognitive Science and Technology (ISTC)
National Research Council (CNR)
Via Nomentana 56, 00161 Rome - Italy
"I will give you everything, so long as you do not demand anything."
(Ettore Petrolini, 1930)
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