/* The contents of this file are subject to the license and copyright terms
* detailed in the license directory at the root of the source tree (also
* available online at http://fedora-commons.org/license/).
*/
package org.fcrepo.server.resourceIndex;
import java.util.Date;
import java.util.Set;
import org.jrdf.graph.ObjectNode;
import org.jrdf.graph.SubjectNode;
import org.jrdf.graph.Triple;
import org.fcrepo.common.rdf.RDFName;
import org.fcrepo.common.rdf.SimpleLiteral;
import org.fcrepo.common.rdf.SimpleTriple;
import org.fcrepo.server.errors.ResourceIndexException;
import org.fcrepo.utilities.DateUtility;
import static org.fcrepo.common.Constants.MODEL;
import static org.fcrepo.common.Constants.RDF_XSD;
public abstract class TripleGeneratorBase {
// Helper methods for creating RDF components
protected RDFName getStateResource(String state)
throws ResourceIndexException {
if (state == null) {
throw new ResourceIndexException("State cannot be null");
} else if (state.equals("A")) {
return MODEL.ACTIVE;
} else if (state.equals("D")) {
return MODEL.DELETED;
} else if (state.equals("I")) {
return MODEL.INACTIVE;
} else {
throw new ResourceIndexException("Unrecognized state: " + state);
}
}
// Helper methods for adding triples
protected void add(SubjectNode subject,
RDFName predicate,
ObjectNode object,
Set<Triple> set) throws ResourceIndexException {
set.add(new SimpleTriple(subject, predicate, object));
}
protected void add(SubjectNode subject,
RDFName predicate,
String lexicalValue,
Set<Triple> set) throws Exception {
if (lexicalValue != null) {
set.add(new SimpleTriple(subject, predicate, new SimpleLiteral(lexicalValue)));
}
}
protected void add(SubjectNode subject,
RDFName predicate,
String lexicalValue,
String lang,
Set<Triple> set) throws Exception {
if (lexicalValue != null) {
set.add(new SimpleTriple(subject, predicate, new SimpleLiteral(lexicalValue, lang)));
}
}
protected void add(SubjectNode subject,
RDFName predicate,
Date dateValue,
Set<Triple> set) throws Exception {
if (dateValue != null) {
String lexicalValue = DateUtility.convertDateToXSDString(dateValue);
ObjectNode object = new SimpleLiteral(lexicalValue,
RDF_XSD.DATE_TIME.getURI());
set.add(new SimpleTriple(subject, predicate, object));
}
}
protected void add(SubjectNode subject,
RDFName predicate,
boolean booleanValue,
Set<Triple> set) throws Exception {
add(subject, predicate, Boolean.toString(booleanValue), set);
}
}