public PagingLoadResult<Example> getCurrentQueryResult(PagingLoadConfig config)
throws SPARQLQueryException {
logger.debug("Retrieving results for current query.");
List<Example> queryResult = new ArrayList<Example>();
String currentQuery = exampleFinder.getCurrentQuery();
logger.debug("Current query:\n");
logger.debug(currentQuery);
int limit = config.getLimit();
int offset = config.getOffset();
int totalLength = 10;
try {
ResultSetRewindable rs =
SparqlQuery.convertJSONtoResultSet(
selectCache.executeSelectQuery(endpoint, getCountQuery(currentQuery)));
totalLength = rs.next().getLiteral(rs.getResultVars().get(0)).getInt();
} catch (Exception e) {
e.printStackTrace();
}
try {
ResultSetRewindable rs =
SparqlQuery.convertJSONtoResultSet(
selectCache.executeSelectQuery(
endpoint, modifyQuery(currentQuery + " LIMIT " + limit + " OFFSET " + offset)));
String uri;
String label = "";
String imageURL = "";
String comment = "";
QuerySolution qs;
while (rs.hasNext()) {
qs = rs.next();
uri = qs.getResource("x0").getURI();
label = qs.getLiteral("label").getLexicalForm();
queryResult.add(new Example(uri, label, imageURL, comment));
}
} catch (Exception e) {
logger.error("Error while getting result for query \n" + currentQuery, e);
}
PagingLoadResult<Example> result = new BasePagingLoadResult<Example>(queryResult);
result.setOffset(offset);
result.setTotalLength(totalLength);
return result;
}
public Map<String, String> getProperties(String query) throws AutoSPARQLException {
property2LabelMap = new TreeMap<String, String>();
String queryTriples = query.substring(18, query.length() - 1);
String newQuery =
"SELECT DISTINCT ?p ?label WHERE {"
+ queryTriples
+ "?x0 ?p ?o. "
+ "?p <"
+ RDFS.label
+ "> ?label. FILTER(LANGMATCHES(LANG(?label), 'en'))} "
+ "LIMIT 1000";
ResultSet rs =
SparqlQuery.convertJSONtoResultSet(selectCache.executeSelectQuery(endpoint, newQuery));
QuerySolution qs;
while (rs.hasNext()) {
qs = rs.next();
property2LabelMap.put(qs.getResource("p").getURI(), qs.getLiteral("label").getLexicalForm());
}
Iterator<String> it = property2LabelMap.keySet().iterator();
while (it.hasNext()) {
String uri = it.next();
if (!uri.startsWith("http://dbpedia.org/ontology")) {
it.remove();
}
}
property2LabelMap.put(RDFS.label.getURI(), "label");
return property2LabelMap;
}
public PagingLoadResult<Example> getSPARQLQueryResultWithProperties(
String query, List<String> properties, PagingLoadConfig config) throws AutoSPARQLException {
List<Example> queryResult = new ArrayList<Example>();
// properties.remove("label");
int limit = config.getLimit();
int offset = config.getOffset();
int totalLength = 10;
if (currentQueryResultSize == -1) {
try {
ResultSetRewindable rs =
SparqlQuery.convertJSONtoResultSet(
selectCache.executeSelectQuery(endpoint, getCountQuery(query)));
currentQueryResultSize = rs.next().getLiteral(rs.getResultVars().get(0)).getInt();
} catch (Exception e) {
e.printStackTrace();
currentQueryResultSize = 10;
}
}
totalLength = currentQueryResultSize;
List<String> propertiesToDo = new ArrayList<String>(properties);
for (Map<String, Object> prop2Value : propertiesCache.values()) {
propertiesToDo.removeAll(prop2Value.keySet());
}
if (propertiesToDo.size() > 0) {
String queryTriples = query.substring(18, query.length() - 1);
StringBuilder newQuery = new StringBuilder();
Map<String, String> var2URIMap = new HashMap<String, String>(propertiesToDo.size());
if (propertiesToDo.size() == 1 && propertiesToDo.get(0).equals(RDFS.label.getURI())) {
newQuery.append("SELECT DISTINCT ?x0 ?label ?imageURL{");
newQuery.append(queryTriples);
newQuery.append("?x0 <").append(RDFS.label).append("> ?label.\n");
newQuery
.append("OPTIONAL{?x0 <")
.append("http://dbpedia.org/ontology/thumbnail")
.append("> ?imageURL.}\n");
newQuery.append("FILTER(LANGMATCHES(LANG(?label),'en'))");
newQuery.append("}");
} else {
for (String property : propertiesToDo) {
var2URIMap.put(
property2LabelMap.get(property).replace(" ", "_").replace("(", "").replace(")", ""),
property);
}
newQuery.append("SELECT DISTINCT ?x0 ?label ?imageURL ");
for (String var : var2URIMap.keySet()) {
newQuery.append("?").append(var).append(" ");
newQuery.append("?").append(var).append("_label ");
}
newQuery.append("{");
newQuery.append(queryTriples);
newQuery.append("?x0 <").append(RDFS.label).append("> ?label.\n");
newQuery
.append("OPTIONAL{?x0 <")
.append("http://dbpedia.org/ontology/thumbnail")
.append("> ?imageURL.}\n");
for (Entry<String, String> entry : var2URIMap.entrySet()) {
newQuery
.append("OPTIONAL{?x0 <")
.append(entry.getValue())
.append("> ?")
.append(entry.getKey())
.append(".}\n");
}
for (Entry<String, String> entry : var2URIMap.entrySet()) {
newQuery
.append("OPTIONAL{?")
.append(entry.getKey())
.append(" <")
.append(RDFS.label)
.append("> ?")
.append(entry.getKey())
.append("_label.\n");
newQuery.append("FILTER(LANGMATCHES(LANG(?" + entry.getKey() + "_label),'en'))}\n");
}
newQuery.append("FILTER(LANGMATCHES(LANG(?label),'en'))");
newQuery.append("}");
}
logger.debug("Query with properties:\n" + newQuery.toString());
try {
ResultSetRewindable rs =
SparqlQuery.convertJSONtoResultSet(
selectCache.executeSelectQuery(endpoint, modifyQuery(newQuery + " LIMIT 1000")));
String uri;
String label = "";
String imageURL = "";
QuerySolution qs;
RDFNode object;
while (rs.hasNext()) {
qs = rs.next();
uri = qs.getResource("x0").getURI();
label = qs.getLiteral("label").getLexicalForm();
imageURL = qs.getResource("imageURL") != null ? qs.getResource("imageURL").getURI() : "";
Map<String, Object> properties2Value = propertiesCache.get(uri);
if (properties2Value == null) {
properties2Value = new HashMap<String, Object>();
properties2Value.put(RDFS.label.getURI(), label);
properties2Value.put("http://dbpedia.org/ontology/thumbnail", imageURL);
propertiesCache.put(uri, properties2Value);
}
Object value;
String property;
for (Entry<String, String> entry : var2URIMap.entrySet()) {
value = "";
property = entry.getValue();
object = qs.get(entry.getKey() + "_label");
if (object == null) {
object = qs.get(entry.getKey());
}
if (object != null) {
if (object.isURIResource()) {
value = object.asResource().getURI();
} else if (object.isLiteral()) {
Literal lit = object.asLiteral();
// if(lit.getDatatypeURI().equals(XSD.BOOLEAN)){
// property2DatatypeMap.put(property, Boolean.class);
// value = lit.getBoolean();
// } else if(lit.getDatatypeURI().equals(XSD.INT)){
// property2DatatypeMap.put(property, Integer.class);
// value = lit.getInt();
// } else if(lit.getDatatypeURI().equals(XSD.DOUBLE)){
// property2DatatypeMap.put(property, Double.class);
// value = lit.getDouble();
// } else if(lit.getDatatypeURI().equals(XSD.FLOAT)){
// property2DatatypeMap.put(property, Float.class);
// value = lit.getFloat();
// } else {
// property2DatatypeMap.put(property, String.class);
// value = object.asLiteral().getLexicalForm();
// }
value = object.asLiteral().getLexicalForm();
}
}
Object oldValue = properties2Value.get(property);
if (oldValue != null && value != null) {
value = oldValue + ", " + value;
}
properties2Value.put(property, value);
}
}
} catch (Exception e) {
logger.error("Error while getting result for query \n" + newQuery, e);
}
}
Example example;
int cnt = 0;
for (Entry<String, Map<String, Object>> uri2PropertyValues : propertiesCache.entrySet()) {
// if(cnt++ == limit+offset){
// break;
// }
// if(cnt > offset){
example = new Example();
example.setAllowNestedValues(false);
example.set("uri", uri2PropertyValues.getKey());
Object value;
String property;
for (Entry<String, Object> property2Value : uri2PropertyValues.getValue().entrySet()) {
property = property2Value.getKey();
value = property2Value.getValue();
// if(value == null){
// Class cls = property2DatatypeMap.get(property);
// if(cls == String.class){
// value = "";
// } else if(cls == Integer.class){
// value = Integer.valueOf(-1);
// } else if(cls == Double.class){
// value = Double.valueOf(-1);
// } else if(cls == Float.class){
// value = Float.valueOf(-1);
// } else if(cls == Boolean.class){
// value = Boolean.FALSE;
// }
// }
example.set(property, value);
}
queryResult.add(example);
// }
}
if (config.getSortInfo().getSortField() != null) {
final String sortField = config.getSortInfo().getSortField();
Collections.sort(
queryResult,
config
.getSortInfo()
.getSortDir()
.comparator(
new Comparator<Example>() {
@Override
public int compare(Example o1, Example o2) {
return ((String) o1.get(sortField)).compareTo((String) o2.get(sortField));
}
}));
}
int start = config.getOffset();
int end = queryResult.size();
if (limit > 0) {
end = Math.min(start + limit, end);
}
// queryResult = queryResult.subList(start, end);
ArrayList<Example> tmp = new ArrayList<Example>();
for (int i = start; i < end; i++) {
tmp.add(queryResult.get(i));
}
PagingLoadResult<Example> result = new BasePagingLoadResult<Example>(tmp);
result.setOffset(offset);
result.setTotalLength(totalLength);
return result;
}