Examples with Graph org.apache.clerezza.commons.rdf.Graph used on opensource projects

Example 71 with Graph

use of org.apache.clerezza.commons.rdf.Graph 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;
    }
}

Example 72 with Graph

use of org.apache.clerezza.commons.rdf.Graph 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());
    }
}

Example 73 with Graph

use of org.apache.clerezza.commons.rdf.Graph 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());
}

Example 74 with Graph

use of org.apache.clerezza.commons.rdf.Graph 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;
}

Example 75 with Graph

use of org.apache.clerezza.commons.rdf.Graph in project stanbol by apache.

the class ClerezzaRuleStore method removeRule.

@Override
public Recipe removeRule(Recipe recipe, Rule rule) {
    Graph tripleCollection = tcManager.getGraph(recipe.getRecipeID());
    // remove from the graph recipe all the triples having the ruleID as subject.
    Iterator<Triple> triplesIterator = tripleCollection.filter(rule.getRuleID(), null, null);
    while (triplesIterator.hasNext()) {
        tripleCollection.remove(triplesIterator.next());
    }
    // remove from the graph recipe the triple recipeID hasRule ruleID
    tripleCollection.remove(new TripleImpl(recipe.getRecipeID(), Symbols.hasRule, rule.getRuleID()));
    recipe.removeRule(rule);
    return recipe;
}