@Test
public void testAddWhileQuerying() throws Exception {
// Add some data to the repository
con.begin();
con.addStatement(painter, RDF.TYPE, RDFS.CLASS);
con.addStatement(painting, RDF.TYPE, RDFS.CLASS);
con.addStatement(picasso, RDF.TYPE, painter);
con.addStatement(guernica, RDF.TYPE, painting);
con.addStatement(picasso, paints, guernica);
con.commit();
ParsedTupleQuery tupleQuery =
QueryParserUtil.parseTupleQuery(QueryLanguage.SERQL, "SELECT C FROM {} rdf:type {C}", null);
CloseableIteration<? extends BindingSet, QueryEvaluationException> iter;
iter = con.evaluate(tupleQuery.getTupleExpr(), null, EmptyBindingSet.getInstance(), false);
con.begin();
while (iter.hasNext()) {
BindingSet bindings = iter.next();
Value c = bindings.getValue("C");
if (c instanceof Resource) {
con.addStatement((Resource) c, RDF.TYPE, RDFS.CLASS);
}
}
con.commit();
assertEquals(3, countElements(con.getStatements(null, RDF.TYPE, RDFS.CLASS, false)));
// simulate auto-commit
tupleQuery =
QueryParserUtil.parseTupleQuery(QueryLanguage.SERQL, "SELECT P FROM {} P {}", null);
iter = con.evaluate(tupleQuery.getTupleExpr(), null, EmptyBindingSet.getInstance(), false);
while (iter.hasNext()) {
BindingSet bindings = iter.next();
Value p = bindings.getValue("P");
if (p instanceof URI) {
con.begin();
con.addStatement((URI) p, RDF.TYPE, RDF.PROPERTY);
con.commit();
}
}
assertEquals(2, countElements(con.getStatements(null, RDF.TYPE, RDF.PROPERTY, false)));
}
protected void testValueRoundTrip(Resource subj, URI pred, Value obj) throws Exception {
con.begin();
con.addStatement(subj, pred, obj);
con.commit();
CloseableIteration<? extends Statement, SailException> stIter =
con.getStatements(null, null, null, false);
try {
assertTrue(stIter.hasNext());
Statement st = stIter.next();
assertEquals(subj, st.getSubject());
assertEquals(pred, st.getPredicate());
assertEquals(obj, st.getObject());
assertTrue(!stIter.hasNext());
} finally {
stIter.close();
}
ParsedTupleQuery tupleQuery =
QueryParserUtil.parseTupleQuery(
QueryLanguage.SERQL,
"SELECT S, P, O FROM {S} P {O} WHERE P = <" + pred.stringValue() + ">",
null);
CloseableIteration<? extends BindingSet, QueryEvaluationException> iter;
iter = con.evaluate(tupleQuery.getTupleExpr(), null, EmptyBindingSet.getInstance(), false);
try {
assertTrue(iter.hasNext());
BindingSet bindings = iter.next();
assertEquals(subj, bindings.getValue("S"));
assertEquals(pred, bindings.getValue("P"));
assertEquals(obj, bindings.getValue("O"));
assertTrue(!iter.hasNext());
} finally {
iter.close();
}
}
@Test
public void testContexts() throws Exception {
con.begin();
// Add schema data to the repository, no context
con.addStatement(painter, RDF.TYPE, RDFS.CLASS);
con.addStatement(painting, RDF.TYPE, RDFS.CLASS);
// Add stuff about picasso to context1
con.addStatement(picasso, RDF.TYPE, painter, context1);
con.addStatement(guernica, RDF.TYPE, painting, context1);
con.addStatement(picasso, paints, guernica, context1);
// Add stuff about rembrandt to context2
con.addStatement(rembrandt, RDF.TYPE, painter, context2);
con.addStatement(nightwatch, RDF.TYPE, painting, context2);
con.addStatement(rembrandt, paints, nightwatch, context2);
con.commit();
assertEquals("context1 should contain 3 statements", 3, countContext1Elements());
assertEquals(
"context2 should contain 3 statements",
3,
countElements(con.getStatements(null, null, null, false, context2)));
assertEquals("Repository should contain 8 statements", 8, countAllElements());
assertEquals(
"statements without context should equal 2",
2,
countElements(con.getStatements(null, null, null, false, (Resource) null)));
assertEquals(
"Statements without context and statements in context 1 together should total 5",
5,
countElements(con.getStatements(null, null, null, false, null, context1)));
assertEquals(
"Statements without context and statements in context 2 together should total 5",
5,
countElements(con.getStatements(null, null, null, false, null, context2)));
assertEquals(
"Statements in context 1 and in context 2 together should total 6",
6,
countElements(con.getStatements(null, null, null, false, context1, context2)));
// remove two statements from context1.
con.begin();
con.removeStatements(picasso, null, null, context1);
con.commit();
assertEquals("context1 should contain 1 statements", 1, countContext1Elements());
assertEquals("Repository should contain 6 statements", 6, countAllElements());
assertEquals(
"Statements without context and statements in context 1 together should total 3",
3,
countElements(con.getStatements(null, null, null, false, null, context1)));
assertEquals(
"Statements without context and statements in context 2 together should total 5",
5,
countElements(con.getStatements(null, null, null, false, context2, null)));
assertEquals(
"Statements in context 1 and in context 2 together should total 4",
4,
countElements(con.getStatements(null, null, null, false, context1, context2)));
}
protected int countAllElements() throws Exception, SailException {
return countElements(con.getStatements(null, null, null, false));
}
protected int countContext1Elements() throws Exception, SailException {
return countElements(con.getStatements(null, null, null, false, context1));
}
