use of org.apache.stanbol.commons.indexedgraph.IndexedGraph in project stanbol by apache.
the class SparqlSearcher method find.
@Override
public final QueryResultList<Representation> find(FieldQuery parsedQuery) throws IOException {
long start = System.currentTimeMillis();
final SparqlFieldQuery query = SparqlFieldQueryFactory.getSparqlFieldQuery(parsedQuery);
String sparqlQuery = query.toSparqlConstruct();
long initEnd = System.currentTimeMillis();
log.debug(" > InitTime: " + (initEnd - start));
log.debug(" > SPARQL query:\n" + sparqlQuery);
InputStream in = SparqlEndpointUtils.sendSparqlRequest(getQueryUri(), sparqlQuery, DEFAULT_RDF_CONTENT_TYPE);
long queryEnd = System.currentTimeMillis();
log.debug(" > QueryTime: " + (queryEnd - initEnd));
if (in != null) {
Graph graph;
Graph rdfData = parser.parse(in, DEFAULT_RDF_CONTENT_TYPE, new IRI(getBaseUri()));
if (rdfData instanceof Graph) {
graph = (Graph) rdfData;
} else {
graph = new IndexedGraph(rdfData);
}
long parseEnd = System.currentTimeMillis();
log.debug(" > ParseTime: " + (parseEnd - queryEnd));
return new RdfQueryResultList(query, graph);
} else {
return null;
}
}
use of org.apache.stanbol.commons.indexedgraph.IndexedGraph in project stanbol by apache.
the class RepresentationReader method parseFromContent.
public Map<String, Representation> parseFromContent(RequestData content, MediaType acceptedMediaType) {
// (3) Parse the Representtion(s) form the entity stream
if (content.getMediaType().isCompatible(MediaType.APPLICATION_JSON_TYPE)) {
//parse from json
throw new UnsupportedOperationException("Parsing of JSON not yet implemented :(");
} else if (isSupported(content.getMediaType())) {
//from RDF serialisation
RdfValueFactory valueFactory = RdfValueFactory.getInstance();
Map<String, Representation> representations = new HashMap<String, Representation>();
Set<BlankNodeOrIRI> processed = new HashSet<BlankNodeOrIRI>();
Graph graph = new IndexedGraph();
try {
parser.parse(graph, content.getEntityStream(), content.getMediaType().toString());
} catch (UnsupportedParsingFormatException e) {
//String acceptedMediaType = httpHeaders.getFirst("Accept");
//throw an internal server Error, because we check in
//isReadable(..) for supported types and still we get here a
//unsupported format -> therefore it looks like an configuration
//error the server (e.g. a missing Bundle with the required bundle)
String message = "Unable to create the Parser for the supported format" + content.getMediaType() + " (" + e + ")";
log.error(message, e);
throw new WebApplicationException(Response.status(Status.INTERNAL_SERVER_ERROR).entity(message).header(HttpHeaders.ACCEPT, acceptedMediaType).build());
} catch (RuntimeException e) {
//NOTE: Clerezza seams not to provide specific exceptions on
// parsing errors. Hence the catch for all RuntimeException
String message = "Unable to parse the provided RDF data (format: " + content.getMediaType() + ", message: " + e.getMessage() + ")";
log.error(message, e);
throw new WebApplicationException(Response.status(Status.BAD_REQUEST).entity(message).header(HttpHeaders.ACCEPT, acceptedMediaType).build());
}
for (Iterator<Triple> st = graph.iterator(); st.hasNext(); ) {
BlankNodeOrIRI resource = st.next().getSubject();
if (resource instanceof IRI && processed.add(resource)) {
//build a new representation
representations.put(((IRI) resource).getUnicodeString(), valueFactory.createRdfRepresentation((IRI) resource, graph));
}
}
return representations;
} else {
//unsupported media type
String message = String.format("Parsed Content-Type '%s' is not one of the supported %s", content.getMediaType(), supportedMediaTypes);
log.info("Bad Request: {}", message);
throw new WebApplicationException(Response.status(Status.BAD_REQUEST).entity(message).header(HttpHeaders.ACCEPT, acceptedMediaType).build());
}
}
use of org.apache.stanbol.commons.indexedgraph.IndexedGraph in project stanbol by apache.
the class RdfResultListTest method testRdfResultSorting.
/**
* Providing a sorted Iteration over query results stored in an RDF
* graph is not something trivial. Therefore this test
*/
@Test
public void testRdfResultSorting() {
SortedMap<Double, RdfRepresentation> sorted = new TreeMap<Double, RdfRepresentation>();
Graph resultGraph = new IndexedGraph();
RdfValueFactory vf = new RdfValueFactory(resultGraph);
IRI resultListNode = new IRI(RdfResourceEnum.QueryResultSet.getUri());
IRI resultProperty = new IRI(RdfResourceEnum.queryResult.getUri());
for (int i = 0; i < 100; i++) {
Double rank;
do {
//avoid duplicate keys
rank = Math.random();
} while (sorted.containsKey(rank));
RdfRepresentation r = vf.createRepresentation("urn:sortTest:rep." + i);
//link the representation with the query result set
resultGraph.add(new TripleImpl(resultListNode, resultProperty, r.getNode()));
r.set(RdfResourceEnum.resultScore.getUri(), rank);
sorted.put(rank, r);
}
RdfQueryResultList resultList = new RdfQueryResultList(new FieldQueryImpl(), resultGraph);
if (log.isDebugEnabled()) {
log.debug("---DEBUG Sorting ---");
for (Iterator<Representation> it = resultList.iterator(); it.hasNext(); ) {
Representation r = it.next();
log.debug("{}: {}", r.getFirst(RdfResourceEnum.resultScore.getUri()), r.getId());
}
}
log.debug("---ASSERT Sorting ---");
for (Iterator<Representation> it = resultList.iterator(); it.hasNext(); ) {
Representation r = it.next();
Double lastkey = sorted.lastKey();
Representation last = sorted.get(lastkey);
Assert.assertEquals("score: " + r.getFirst(RdfResourceEnum.resultScore.getUri()) + " of Representation " + r.getId() + " is not as expected " + last.getFirst(RdfResourceEnum.resultScore.getUri()) + " of Representation " + last.getId() + "!", r, last);
sorted.remove(lastkey);
}
Assert.assertTrue(sorted.isEmpty());
}
use of org.apache.stanbol.commons.indexedgraph.IndexedGraph in project stanbol by apache.
the class ClerezzaModelWriter method toRDF.
private Graph toRDF(QueryResultList<?> resultList) {
final Graph resultGraph;
Class<?> type = resultList.getType();
if (String.class.isAssignableFrom(type)) {
//create a new ImmutableGraph
resultGraph = new IndexedGraph();
for (Object result : resultList) {
//add a triple to each reference in the result set
resultGraph.add(new TripleImpl(QUERY_RESULT_LIST, QUERY_RESULT, new IRI(result.toString())));
}
} else {
//first determine the type of the resultList
final boolean isSignType;
if (Representation.class.isAssignableFrom(type)) {
isSignType = false;
} else if (Representation.class.isAssignableFrom(type)) {
isSignType = true;
} else {
//incompatible type -> throw an Exception
throw new IllegalArgumentException("Parsed type " + type + " is not supported");
}
//special treatment for RdfQueryResultList for increased performance
if (resultList instanceof RdfQueryResultList) {
resultGraph = ((RdfQueryResultList) resultList).getResultGraph();
if (isSignType) {
//if we build a ResultList for Signs, that we need to do more things
//first remove all triples representing results
Iterator<Triple> resultTripleIt = resultGraph.filter(QUERY_RESULT_LIST, QUERY_RESULT, null);
while (resultTripleIt.hasNext()) {
resultTripleIt.next();
resultTripleIt.remove();
}
//to the Sign IDs
for (Object result : resultList) {
IRI signId = new IRI(((Entity) result).getId());
addEntityTriplesToGraph(resultGraph, (Entity) result);
resultGraph.add(new TripleImpl(QUERY_RESULT_LIST, QUERY_RESULT, signId));
}
}
} else {
//any other implementation of the QueryResultList interface
//create a new graph
resultGraph = new IndexedGraph();
if (Representation.class.isAssignableFrom(type)) {
for (Object result : resultList) {
IRI resultId;
if (!isSignType) {
addRDFTo(resultGraph, (Representation) result);
resultId = new IRI(((Representation) result).getId());
} else {
addRDFTo(resultGraph, (Entity) result);
resultId = new IRI(((Entity) result).getId());
}
//Note: In case of Representation this Triple points to
// the representation. In case of Signs it points to
// the sign.
resultGraph.add(new TripleImpl(QUERY_RESULT_LIST, QUERY_RESULT, resultId));
}
}
}
}
return resultGraph;
}
use of org.apache.stanbol.commons.indexedgraph.IndexedGraph in project stanbol by apache.
the class DereferenceEngineTest method validateDereferencedEntities.
private void validateDereferencedEntities(Graph metadata, IRI... entityReferenceFields) {
Graph expected = new IndexedGraph();
for (IRI entityReferenceField : entityReferenceFields) {
Iterator<Triple> referenced = metadata.filter(null, entityReferenceField, null);
while (referenced.hasNext()) {
IRI entity = (IRI) referenced.next().getObject();
Iterator<Triple> entityTriples = testData.filter(entity, null, null);
while (entityTriples.hasNext()) {
expected.add(entityTriples.next());
}
}
}
Graph notExpected = new IndexedGraph(testData);
notExpected.removeAll(expected);
Assert.assertTrue(metadata.containsAll(expected));
Assert.assertTrue(Collections.disjoint(metadata, notExpected));
}
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