private Model execute(Model inputModel, String endpoint) {
Model cube = createModel();
Resource dataset;
Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
dataset =
cube.createResource(
GK.uri + "Properties_per_Class" + calendar.getTimeInMillis(), QB.Dataset);
dataset.addLiteral(RDFS.comment, "Properties per class");
dataset.addLiteral(DCTerms.date, cube.createTypedLiteral(calendar));
dataset.addLiteral(DCTerms.publisher, "R & D, Unister GmbH, Geoknow");
dataset.addProperty(QB.structure, cube.createResource(STRUCTURE));
QueryExecution qExec;
if (inputModel != null) {
qExec = QueryExecutionFactory.create(INSTANCES, inputModel);
} else {
qExec =
QueryExecutionFactory.sparqlService(endpoint, INSTANCES, defaultGraphs, defaultGraphs);
}
ResultSet result = qExec.execSelect();
int i = 0;
while (result.hasNext()) {
Resource owlClass = result.next().getResource("class");
NUMBER_OF_PROPERTIES.setIri("class", owlClass.getURI());
QueryExecution propertiesQexec;
if (inputModel != null) {
propertiesQexec = QueryExecutionFactory.create(NUMBER_OF_PROPERTIES.asQuery(), inputModel);
} else {
propertiesQexec =
QueryExecutionFactory.sparqlService(
endpoint, NUMBER_OF_PROPERTIES.asQuery(), defaultGraphs, defaultGraphs);
System.out.println(NUMBER_OF_PROPERTIES.asQuery());
}
try {
ResultSet propertiesResult = propertiesQexec.execSelect();
if (propertiesResult.hasNext()) {
System.out.println(i);
Resource obs =
cube.createResource(
"http://www.geoknow.eu/data-cube/metric2/observation" + i, QB.Observation);
obs.addProperty(QB.dataset, dataset);
obs.addProperty(GK.DIM.Class, owlClass);
obs.addLiteral(GK.MEASURE.PropertyCount, propertiesResult.next().getLiteral("count"));
i++;
}
} catch (Exception e) {
System.out.println(i);
Resource obs =
cube.createResource(
"http://www.geoknow.eu/data-cube/metric2/observation" + i, QB.Observation);
obs.addProperty(QB.dataset, dataset);
obs.addProperty(GK.DIM.Class, owlClass);
obs.addLiteral(GK.MEASURE.PropertyCount, -1);
obs.addLiteral(RDFS.comment, e.getMessage());
i++;
}
}
return cube;
}
private void generateSample() {
logger.info("Generating sample...");
sample = ModelFactory.createDefaultModel();
// we have to set up a new query execution factory working on our local model
qef = new QueryExecutionFactoryModel(sample);
reasoner = new SPARQLReasoner(qef);
// get the page size
// TODO put to base class
long pageSize = 10000; // PaginationUtils.adjustPageSize(globalQef, 10000);
ParameterizedSparqlString sampleQueryTemplate = getSampleQuery();
sampleQueryTemplate.setIri("p", entityToDescribe.toStringID());
Query query = sampleQueryTemplate.asQuery();
query.setLimit(pageSize);
boolean isEmpty = false;
int i = 0;
while (!isTimeout() && !isEmpty) {
// get next sample
logger.debug("Extending sample...");
query.setOffset(i++ * pageSize);
QueryExecution qe = ksQef.createQueryExecution(query);
Model tmp = qe.execConstruct();
sample.add(tmp);
// if last call returned empty model, we can leave loop
isEmpty = tmp.isEmpty();
}
logger.info("...done. Sample size: " + sample.size() + " triples");
}
private Model execute(Model inputModel, String endpoint) {
Model cube = createModel();
Resource dataset;
Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
dataset = cube.createResource(GK.uri + "Average_Surface", QB.Dataset);
dataset.addLiteral(RDFS.comment, "Average Surface per class");
dataset.addLiteral(DCTerms.date, cube.createTypedLiteral(calendar));
dataset.addLiteral(DCTerms.publisher, "R & D, Unister GmbH, Geoknow");
dataset.addProperty(QB.structure, cube.createResource(STRUCTURE));
if (endpoint != null) {
dataset.addProperty(DCTerms.source, endpoint);
}
QueryExecution qExec;
if (inputModel != null) {
qExec = QueryExecutionFactory.create(GET_CLASSES, inputModel);
} else {
qExec =
QueryExecutionFactory.sparqlService(endpoint, GET_CLASSES, defaultGraphs, defaultGraphs);
}
ResultSet result = qExec.execSelect();
int obsCount = 0;
while (result.hasNext()) {
double area = 0;
int i = 0;
Resource owlClass = result.next().get("class").asResource();
if (!blacklist.contains(owlClass.toString())) {
System.out.println(owlClass);
GET_INSTANCES.setIri("class", owlClass.getURI());
QueryExecution qexecInstances;
if (inputModel != null) {
qexecInstances = QueryExecutionFactory.create(GET_INSTANCES.asQuery(), inputModel);
} else {
qexecInstances =
QueryExecutionFactory.sparqlService(
endpoint, GET_INSTANCES.asQuery(), defaultGraphs, defaultGraphs);
}
for (ResultSet instancesResult = qexecInstances.execSelect(); instancesResult.hasNext(); ) {
QuerySolution next = instancesResult.next();
String instance = next.get("instance").asResource().getURI();
if (instance == null) {
continue;
}
POLYGON.setIri("instance", instance);
QueryExecution qexecMember;
if (inputModel != null) {
qexecMember = QueryExecutionFactory.create(POLYGON.asQuery(), inputModel);
} else {
qexecMember =
QueryExecutionFactory.sparqlService(
endpoint, POLYGON.asQuery(), defaultGraphs, defaultGraphs);
}
StringBuilder polygonBuilder = new StringBuilder();
firstLat = null;
firstLong = null;
for (ResultSet latLong = qexecMember.execSelect(); latLong.hasNext(); ) {
processPoint(latLong.next(), polygonBuilder);
}
if (polygonBuilder.length() > 0) {
area += calculateArea(polygonBuilder);
} else {
area = 0;
polygonBuilder.setLength(0);
this.firstLat = null;
this.firstLong = null;
MULTI_POLYGON.setIri("instance", instance);
QueryExecution qexecMultiPolygon;
if (inputModel != null) {
qexecMultiPolygon = QueryExecutionFactory.create(MULTI_POLYGON.asQuery(), inputModel);
} else {
qexecMultiPolygon =
QueryExecutionFactory.sparqlService(
endpoint, MULTI_POLYGON.asQuery(), defaultGraphs, defaultGraphs);
}
String polygonName = "";
for (ResultSet latLong = qexecMultiPolygon.execSelect(); latLong.hasNext(); ) {
QuerySolution solution = latLong.next();
if (!polygonName.equals(solution.get("polygon").asNode().getBlankNodeLabel())) {
if (polygonBuilder.length() > 0) {
area += calculateArea(polygonBuilder);
}
this.firstLat = null;
this.firstLong = null;
polygonBuilder.setLength(0);
}
polygonName = solution.get("polygon").asNode().getBlankNodeLabel();
processPoint(solution, polygonBuilder);
}
}
i++;
}
}
Resource obs = cube.createResource(structureUri + "/obs/" + obsCount, QB.Observation);
double average = i == 0 ? 0 : area / i;
obs.addProperty(GK.MEASURE.Average, cube.createTypedLiteral(average));
obs.addProperty(GK.DIM.Class, owlClass);
obs.addProperty(QB.dataset, dataset);
obsCount++;
}
return cube;
}
