use of org.openrdf.query.parser.ParsedQuery in project blueprints by tinkerpop.
the class PropertyGraphSailTest method testSPARQL.
@Test
public void testSPARQL() throws Exception {
int count;
String queryStr = "PREFIX pgm: <" + PropertyGraphSail.ONTOLOGY_NS + ">\n" + "PREFIX prop: <" + PropertyGraphSail.PROPERTY_NS + ">\n" + "SELECT ?project ?name WHERE {\n" + " ?marko prop:name \"marko\".\n" + " ?e1 pgm:label \"knows\".\n" + " ?e1 pgm:tail ?marko.\n" + " ?e1 pgm:head ?friend.\n" + " ?e2 pgm:label \"created\".\n" + " ?e2 pgm:tail ?friend.\n" + " ?e2 pgm:head ?project.\n" + " ?project prop:name ?name.\n" + "}";
System.out.println(queryStr);
ParsedQuery query = new SPARQLParser().parseQuery(queryStr, "http://example.org/bogus/");
CloseableIteration<? extends BindingSet, QueryEvaluationException> results = sc.evaluate(query.getTupleExpr(), query.getDataset(), new EmptyBindingSet(), false);
try {
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI project = (URI) set.getValue("project");
Literal name = (Literal) set.getValue("name");
assertNotNull(project);
assertNotNull(name);
System.out.println("project = " + project + ", name = " + name);
}
} finally {
results.close();
}
assertEquals(2, count);
}
use of org.openrdf.query.parser.ParsedQuery in project blueprints by tinkerpop.
the class SailGraph method executeSparql.
/**
* Evaluate a SPARQL query against the SailGraph (http://www.w3.org/TR/rdf-sparql-query/). The result is a mapping between the ?-bindings and the bound URI, blank node, or literal represented as a Vertex.
*
* @param sparqlQuery the SPARQL query to evaluate
* @return the mapping between a ?-binding and the URI, blank node, or literal as a Vertex
* @throws RuntimeException if an error occurs in the SPARQL query engine
*/
public List<Map<String, Vertex>> executeSparql(String sparqlQuery) throws RuntimeException {
try {
sparqlQuery = getPrefixes() + sparqlQuery;
final SPARQLParser parser = new SPARQLParser();
final ParsedQuery query = parser.parseQuery(sparqlQuery, null);
boolean includeInferred = false;
final CloseableIteration<? extends BindingSet, QueryEvaluationException> results = this.sailConnection.get().evaluate(query.getTupleExpr(), query.getDataset(), new MapBindingSet(), includeInferred);
final List<Map<String, Vertex>> returnList = new ArrayList<Map<String, Vertex>>();
try {
while (results.hasNext()) {
BindingSet bs = results.next();
Map<String, Vertex> returnMap = new HashMap<String, Vertex>();
for (Binding b : bs) {
returnMap.put(b.getName(), this.getVertex(b.getValue().toString()));
}
returnList.add(returnMap);
}
} finally {
results.close();
}
return returnList;
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
use of org.openrdf.query.parser.ParsedQuery in project blueprints by tinkerpop.
the class SailTest method testJoins.
@Test
public void testJoins() throws Exception {
SPARQLParser parser = new SPARQLParser();
BindingSet bindings = new EmptyBindingSet();
String baseURI = "http://example.org/bogus/";
SailConnection sc = sail.getConnection();
try {
CloseableIteration<? extends BindingSet, QueryEvaluationException> results;
int count;
String queryStr = "PREFIX : <urn:com.tinkerpop.blueprints.pgm.oupls.sail.test/>\n" + "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?foaf WHERE {\n" + " :ford foaf:knows ?friend .\n" + " ?friend foaf:knows ?foaf .\n" + "}";
ParsedQuery query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI foaf = (URI) set.getValue("foaf");
assertTrue(foaf.stringValue().startsWith("urn:com.tinkerpop.blueprints.pgm.oupls.sail.test/"));
}
results.close();
assertEquals(4, count);
} finally {
sc.rollback();
sc.close();
}
}
use of org.openrdf.query.parser.ParsedQuery in project blueprints by tinkerpop.
the class SailTest method testEvaluate.
// tuple queries ///////////////////////////////////////////////////////////
@Test
public void testEvaluate() throws Exception {
Set<String> languages;
String prefix = "urn:com.tinkerpop.blueprints.pgm.oupls.sail.test/";
URI thorUri = sail.getValueFactory().createURI(prefix + "thor");
SailConnection sc = sail.getConnection();
try {
sc.begin();
URI uriA = sail.getValueFactory().createURI("http://example.org/uriA");
URI uriB = sail.getValueFactory().createURI("http://example.org/uriB");
URI uriC = sail.getValueFactory().createURI("http://example.org/uriC");
sc.addStatement(uriA, uriB, uriC);
sc.commit();
sc.begin();
SPARQLParser parser = new SPARQLParser();
BindingSet bindings = new EmptyBindingSet();
String baseURI = "http://example.org/bogus/";
String queryStr;
ParsedQuery query;
CloseableIteration<? extends BindingSet, QueryEvaluationException> results;
int count;
// s ?p ?o SELECT
queryStr = "SELECT ?y ?z WHERE { <http://example.org/uriA> ?y ?z }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI y = (URI) set.getValue("y");
Value z = (Value) set.getValue("z");
assertNotNull(y);
assertNotNull(z);
// System.out.println("y = " + y + ", z = " + z);
}
results.close();
assertTrue(count > 0);
// s p ?o SELECT using a namespace prefix
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?z WHERE { <" + prefix + "thor> foaf:name ?z }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
languages = new HashSet<String>();
while (results.hasNext()) {
count++;
BindingSet set = results.next();
Literal z = (Literal) set.getValue("z");
assertNotNull(z);
languages.add(z.getLanguage());
}
results.close();
assertTrue(count > 0);
assertEquals(2, languages.size());
assertTrue(languages.contains("en"));
assertTrue(languages.contains("is"));
// ?s p o SELECT using a plain literal value with no language tag
queryStr = "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n" + "SELECT ?s WHERE { ?s rdfs:comment \"he really knows where his towel is\" }";
URI fordUri = sail.getValueFactory().createURI(prefix + "ford");
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI s = (URI) set.getValue("s");
assertNotNull(s);
assertEquals(s, fordUri);
}
results.close();
assertTrue(count > 0);
// ?s p o SELECT using a language-specific literal value
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?s WHERE { ?s foaf:name \"Thor\"@en }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI s = (URI) set.getValue("s");
assertNotNull(s);
assertEquals(s, thorUri);
}
results.close();
assertTrue(count > 0);
// The language tag is necessary
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?s WHERE { ?s foaf:name \"Thor\" }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
results.next();
}
results.close();
assertEquals(0, count);
// ?s p o SELECT using a typed literal value
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>\n" + "SELECT ?s WHERE { ?s foaf:msnChatID \"Thorster123\"^^xsd:string }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI s = (URI) set.getValue("s");
assertNotNull(s);
assertEquals(s, thorUri);
}
results.close();
assertTrue(count > 0);
// The data type is necessary
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>\n" + "SELECT ?s WHERE { ?s foaf:msnChatID \"Thorster123\" }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
results.next();
}
results.close();
assertEquals(0, count);
// s ?p o SELECT
// TODO: commented out languages for now
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>\n" + "SELECT ?p WHERE { <" + prefix + "thor> ?p \"Thor\"@en }";
query = parser.parseQuery(queryStr, baseURI);
URI foafNameUri = sail.getValueFactory().createURI("http://xmlns.com/foaf/0.1/name");
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
BindingSet set = results.next();
URI p = (URI) set.getValue("p");
assertNotNull(p);
assertEquals(p, foafNameUri);
}
results.close();
assertTrue(count > 0);
// context-specific SELECT
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?z\n" + "FROM <" + prefix + "ctx1>\n" + "WHERE { <" + prefix + "thor> foaf:name ?z }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
languages = new HashSet<String>();
while (results.hasNext()) {
count++;
BindingSet set = results.next();
Literal z = (Literal) set.getValue("z");
assertNotNull(z);
languages.add(z.getLanguage());
}
results.close();
assertTrue(count > 0);
assertEquals(2, languages.size());
assertTrue(languages.contains("en"));
assertTrue(languages.contains("is"));
queryStr = "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "SELECT ?z\n" + "FROM <http://example.org/emptycontext>\n" + "WHERE { <" + prefix + "thor> foaf:name ?z }";
query = parser.parseQuery(queryStr, baseURI);
results = sc.evaluate(query.getTupleExpr(), query.getDataset(), bindings, false);
count = 0;
while (results.hasNext()) {
count++;
results.next();
}
results.close();
assertEquals(0, count);
// s p o? select without and with inferencing
// TODO commented out waiting for inferencing
// queryStr =
// "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"
// + "SELECT ?o\n"
// + "WHERE { <" + prefix + "instance1> rdf:type ?o }";
// query = parser.parseQuery(queryStr, baseURI);
// results = sc.evaluate(query.getTupleExpr(), query.getDataset(),
// bindings, false);
// count = 0;
// while (results.hasNext()) {
// count++;
// BindingSet set = results.next();
// URI o = (URI) set.getValue("o");
// assertEquals(prefix + "classB", o.toString());
// }
// results.close();
// assertEquals(1, count);
// results = sc.evaluate(query.getTupleExpr(), query.getDataset(),
// bindings, true);
// count = 0;
// boolean foundA = false, foundB = false;
// while (results.hasNext()) {
// count++;
// BindingSet set = results.next();
// URI o = (URI) set.getValue("o");
// String s = o.toString();
// if (s.equals(prefix + "classA")) {
// foundA = true;
// } else if (s.equals(prefix + "classB")) {
// foundB = true;
// }
// }
// results.close();
// assertEquals(2, count);
// assertTrue(foundA);
// assertTrue(foundB);
} finally {
sc.rollback();
sc.close();
}
}
use of org.openrdf.query.parser.ParsedQuery in project blueprints by tinkerpop.
the class GraphSailTest method testCodePlay.
@Test
public void testCodePlay() throws Exception {
Sail sail = new GraphSail(new TinkerGraph());
sail.initialize();
try {
SailConnection sc = sail.getConnection();
try {
sc.begin();
ValueFactory vf = sail.getValueFactory();
sc.addStatement(vf.createURI("http://tinkerpop.com#1"), vf.createURI("http://tinkerpop.com#knows"), vf.createURI("http://tinkerpop.com#3"), vf.createURI("http://tinkerpop.com"));
sc.addStatement(vf.createURI("http://tinkerpop.com#1"), vf.createURI("http://tinkerpop.com#name"), vf.createLiteral("marko"), vf.createURI("http://tinkerpop.com"));
sc.addStatement(vf.createURI("http://tinkerpop.com#3"), vf.createURI("http://tinkerpop.com#name"), vf.createLiteral("josh"), vf.createURI("http://tinkerpop.com"));
CloseableIteration<? extends Statement, SailException> results = sc.getStatements(null, null, null, false);
try {
System.out.println("get statements: ?s ?p ?o ?g");
while (results.hasNext()) {
System.out.println(results.next());
}
} finally {
results.close();
}
System.out.println("\nget statements: http://tinkerpop.com#3 ?p ?o ?g");
results = sc.getStatements(vf.createURI("http://tinkerpop.com#3"), null, null, false);
try {
while (results.hasNext()) {
System.out.println(results.next());
}
} finally {
results.close();
}
SPARQLParser parser = new SPARQLParser();
CloseableIteration<? extends BindingSet, QueryEvaluationException> sparqlResults;
String queryString = "SELECT ?x ?y WHERE { ?x <http://tinkerpop.com#knows> ?y }";
ParsedQuery query = parser.parseQuery(queryString, "http://tinkerPop.com");
System.out.println("\nSPARQL: " + queryString);
sparqlResults = sc.evaluate(query.getTupleExpr(), query.getDataset(), new EmptyBindingSet(), false);
try {
while (sparqlResults.hasNext()) {
System.out.println(sparqlResults.next());
}
} finally {
sparqlResults.close();
}
Graph graph = ((GraphSail) sail).getBaseGraph();
System.out.println();
for (Vertex v : graph.getVertices()) {
System.out.println("------");
System.out.println(v);
for (String key : v.getPropertyKeys()) {
System.out.println(key + "=" + v.getProperty(key));
}
}
for (Edge e : graph.getEdges()) {
System.out.println("------");
System.out.println(e);
for (String key : e.getPropertyKeys()) {
System.out.println(key + "=" + e.getProperty(key));
}
}
} finally {
sc.rollback();
sc.close();
}
} finally {
sail.shutDown();
}
}
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