public void CanBuildUnionWithGraphPatternBuilders()
{
// Define two pattern builders which will be used to generate triple patterns for a UNION expression.
GraphPatternBuilder patternBuilder0 = new GraphPatternBuilder();
GraphPatternBuilder patternBuilder1 = new GraphPatternBuilder();
IQueryBuilder queryBuilder0 = QueryBuilder
.Ask()
.Union(patternBuilder0, patternBuilder1);
// Add some triple patterns after the UNION was added to the query.
patternBuilder0.Where(p => p.Subject("s0").Predicate("p0").ObjectLiteral(0));
patternBuilder1.Where(p => p.Subject("s1").Predicate("p1").ObjectLiteral(1));
SparqlQuery q0 = queryBuilder0.BuildQuery();
Assert.Single(q0.RootGraphPattern.ChildGraphPatterns);
Assert.True(q0.RootGraphPattern.ChildGraphPatterns.First().IsUnion);
Assert.Equal(2, q0.RootGraphPattern.ChildGraphPatterns.First().ChildGraphPatterns.Count());
// Now add other triples to the query after the query was already build.
patternBuilder1.Where(p => p.Subject("s1").Predicate("p2").ObjectLiteral(2));
SparqlQuery q1 = queryBuilder0.BuildQuery();
Assert.Single(q1.RootGraphPattern.ChildGraphPatterns);
Assert.True(q1.RootGraphPattern.ChildGraphPatterns.First().IsUnion);
Assert.Equal(2, q1.RootGraphPattern.ChildGraphPatterns.First().ChildGraphPatterns.Count());
Assert.Contains(q1.RootGraphPattern.ChildGraphPatterns.First().ChildGraphPatterns, p => p.ToString().Contains("p2"));
}
public void ShouldAllowCreatingUnionOfTwoGraphPatterns()
{
// given
_builder.Where(t => t.Subject("s").Predicate("p").Object("o"));
// when
var unionBuilder =
_builder.Union(union => union.Where(t => t.Subject("x").Predicate("y").Object("z")));
var graphPattern = ((GraphPatternBuilder)unionBuilder).BuildGraphPattern(_namespaceMapper.Object);
// then
Assert.IsTrue(graphPattern.IsUnion);
Assert.AreEqual(2, graphPattern.ChildGraphPatterns.Count);
Assert.AreEqual(1, graphPattern.ChildGraphPatterns[0].TriplePatterns.Count);
Assert.AreEqual(1, graphPattern.ChildGraphPatterns[1].TriplePatterns.Count);
Assert.AreEqual(3, graphPattern.ChildGraphPatterns[0].Variables.Count());
Assert.AreEqual(3, graphPattern.ChildGraphPatterns[1].Variables.Count());
}
/// <inheritdoc />
public IGraphPatternBuilder Child(IQueryBuilder queryBuilder)
{
SparqlQuery subquery = queryBuilder.BuildQuery();
GraphPatternBuilder childBuilder = new GraphPatternBuilder();
childBuilder.Where(new SubQueryPattern(subquery));
_childGraphPatternBuilders.Add(childBuilder);
return(this);
}
IGraphPatternBuilder IAssignmentVariableNamePart <IGraphPatternBuilder> .As(string variableName)
{
_graphPatternBuilder.Where(mapper => new ITriplePattern[] { new BindPattern(variableName, BuildAssignmentExpression(mapper)) });
return(_graphPatternBuilder);
}
public IDescribeGraphPatternBuilder Where(params ITriplePattern[] triplePatterns)
{
_builder.Where(triplePatterns);
return(this);
}